
Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.
Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.Modified Bell X-1 model pioneered variable-sweep studies in 1947. Photograph published in Sixty Years of Aeronautical Research 1917-1977 By David A. Anderton. A NASA publication, page 52.

The Bell Aircraft Corporation X-1-2 aircraft on the ramp at NACA High Speed Flight Research Station located on the South Base of Muroc Army Air Field in 1947. The X-1-2 flew until October 23, 1951, completing 74 glide and powered flights with nine different pilots. The aircraft has white paint and the NACA tail band. The black Xs are reference markings for tracking purposes. They were widely used on NACA aircraft in the early 1950s.

NACA X-Planes on South Base ramp. Northrop X-4, Bell X-1, Bell X-5, Douglas D-558-1, Douglas D-558-2. Back row Convair XF-92A. March 30, 1952

CAPE CANAVERAL, Fla. – In the Vehicle Assembly Building's High Bay 4 at NASA's Kennedy Space Center in Florida, the Ares I-X interstage 1 for the upper stage simulator is lowered onto the forward assembly. It will be mated with the frustum on top of the forward assembly. Ares I-X is the flight test vehicle for the Ares I, a component of the Constellation Program. Ares I is the essential core of a safe, reliable, cost-effective space transportation system that eventually will carry crewed missions back to the moon, on to Mars and out into the solar system. Ares I-X is targeted for launch in August 2009. Photo credit: NASA/Tim Jacobs

CAPE CANAVERAL, Fla. – In the Vehicle Assembly Building's High Bay 4 at NASA's Kennedy Space Center in Florida, the Ares I-X interstage 1 for the upper stage simulator is lowered onto the forward assembly. It will be mated with the frustum on top of the forward assembly. Ares I-X is the flight test vehicle for the Ares I, a component of the Constellation Program. Ares I is the essential core of a safe, reliable, cost-effective space transportation system that eventually will carry crewed missions back to the moon, on to Mars and out into the solar system. Ares I-X is targeted for launch in August 2009. Photo credit: NASA/Tim Jacobs

A 1/10th Scale Model of the X-15 research plane is prepared in Langley's 7 x 10 Foot Wind Tunnel for studies relating to spin characteristics. -- Photograph published in Winds of Change, 75th Anniversary NASA publication (page 66), by James Schultz.

CAPE CANAVERAL, Fla. – Mobile Launcher Platform-1 is moving to Launch Pad 39B at NASA's Kennedy Space Center in Florida via the crawler-transporter underneath. The MLP has been handed over to the Constellation Program for its future use for the Ares I-X flight test in the summer of 2009. Seen around the service structures on the pad are the new 600-foot lightning towers and masts erected for the Ares launches. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The MLP is being moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Following this testing, MLP-1 will be moved to the Vehicle Assembly Building's High Bay 3 to begin stacking, or assembling, Ares I-X. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Mobile Launcher Platform-1, on top of the crawler-transporter, nears the flame trench (lower left) on the top of Launch Pad 39B at NASA's Kennedy Space Center in Florida. The MLP has been handed over to the Constellation Program for its future use for the Ares I-X flight test in the summer of 2009. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The MLP is being moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Following this testing, MLP-1 will be moved to the Vehicle Assembly Building's High Bay 3 to begin stacking, or assembling, Ares I-X. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Mobile Launcher Platform-1 nears the top of Launch Pad 39B at NASA's Kennedy Space Center in Florida via the crawler-transporter underneath. The MLP has been handed over to the Constellation Program for its future use for the Ares I-X flight test in the summer of 2009. Seen around the service structures on the pad are the new 600-foot lightning towers and masts erected for the Ares launches. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The MLP is being moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Following this testing, MLP-1 will be moved to the Vehicle Assembly Building's High Bay 3 to begin stacking, or assembling, Ares I-X. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Mobile Launcher Platform-1, on top of the crawler-transporter, reaches the top of Launch Pad 39B at NASA's Kennedy Space Center in Florida. The MLP has been handed over to the Constellation Program for its future use for the Ares I-X flight test in the summer of 2009. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The MLP is being moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Following this testing, MLP-1 will be moved to the Vehicle Assembly Building's High Bay 3 to begin stacking, or assembling, Ares I-X. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Mobile Launcher Platform-1 is moving to Launch Pad 39B at NASA's Kennedy Space Center in Florida via the crawler-transporter underneath. The MLP has been handed over to the Constellation Program for its future use for the Ares I-X flight test in the summer of 2009. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The MLP is being moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Following this testing, MLP-1 will be moved to the Vehicle Assembly Building's High Bay 3 to begin stacking, or assembling, Ares I-X. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Mobile Launcher Platform-1, on top of the crawler-transporter, reaches the top of Launch Pad 39B at NASA's Kennedy Space Center in Florida. The MLP has been handed over to the Constellation Program for its future use for the Ares I-X flight test in the summer of 2009. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The MLP is being moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Following this testing, MLP-1 will be moved to the Vehicle Assembly Building's High Bay 3 to begin stacking, or assembling, Ares I-X. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Mobile Launcher Platform-1 nears the top of Launch Pad 39B at NASA's Kennedy Space Center in Florida via the crawler-transporter underneath. The MLP has been handed over to the Constellation Program for its future use for the Ares I-X flight test in the summer of 2009. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The MLP is being moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Following this testing, MLP-1 will be moved to the Vehicle Assembly Building's High Bay 3 to begin stacking, or assembling, Ares I-X. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Mobile Launcher Platform-1 is moving to Launch Pad 39B at NASA's Kennedy Space Center in Florida via the crawler-transporter underneath. The MLP has been handed over to the Constellation Program for its future use for the Ares I-X flight test in the summer of 2009. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The MLP is being moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Following this testing, MLP-1 will be moved to the Vehicle Assembly Building's High Bay 3 to begin stacking, or assembling, Ares I-X. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – In the Vehicle Assembly Building's High Bay 4 at NASA's Kennedy Space Center in Florida, the Ares I-X interstage 1 for the upper stage simulator (left) is being lifted to move it to the forward assembly. The interstage will be mated with the frustum on the forward assembly. At center is the crew module-launch abort system, or CM-LAS, and simulator service module-service adapter stack. Ares I-X is the flight test vehicle for the Ares I, a component of the Constellation Program. Ares I is the essential core of a safe, reliable, cost-effective space transportation system that eventually will carry crewed missions back to the moon, on to Mars and out into the solar system. Ares I-X is targeted for launch in August 2009. Photo credit: NASA/Tim Jacobs

CAPE CANAVERAL, Fla. – In the Vehicle Assembly Building's High Bay 4 at NASA's Kennedy Space Center in Florida, the Ares I-X interstage 1 for the upper stage simulator is being moved to the forward assembly. The interstage will be mated with the frustum on the forward assembly. To the left is the crew module-launch abort system, or CM-LAS, and simulator service module-service adapter stack. Ares I-X is the flight test vehicle for the Ares I, a component of the Constellation Program. Ares I is the essential core of a safe, reliable, cost-effective space transportation system that eventually will carry crewed missions back to the moon, on to Mars and out into the solar system. Ares I-X is targeted for launch in August 2009. Photo credit: NASA/Tim Jacobs

CAPE CANAVERAL, Fla. – In the Vehicle Assembly Building's High Bay 4 at NASA's Kennedy Space Center in Florida, the Ares I-X interstage 1 for the upper stage simulator is being moved to the forward assembly (far left). The interstage will be mated with the frustum on the forward assembly. To the right is the crew module-launch abort system, or CM-LAS, and simulator service module-service adapter stack. Ares I-X is the flight test vehicle for the Ares I, a component of the Constellation Program. Ares I is the essential core of a safe, reliable, cost-effective space transportation system that eventually will carry crewed missions back to the moon, on to Mars and out into the solar system. Ares I-X is targeted for launch in August 2009. Photo credit: NASA/Tim Jacobs

CAPE CANAVERAL, Fla. – In the Vehicle Assembly Building's High Bay 4 at NASA's Kennedy Space Center in Florida, the Ares I-X interstage 1 for the upper stage simulator is being moved to the forward assembly. The interstage will be mated with the frustum on the forward assembly. To the right is the crew module-launch abort system, or CM-LAS, and simulator service module-service adapter stack. Ares I-X is the flight test vehicle for the Ares I, a component of the Constellation Program. Ares I is the essential core of a safe, reliable, cost-effective space transportation system that eventually will carry crewed missions back to the moon, on to Mars and out into the solar system. Ares I-X is targeted for launch in August 2009. Photo credit: NASA/Tim Jacobs

A 1953 photo of some of the research aircraft at the NACA High-Speed Flight Research Station (now known as the the Dryden Flight Research Center). The photo shows the X-3 (center) and, clockwise from left: X-1A (Air Force serial number 48-1384), the third D-558-1 (NACA tail number 142), XF-92A, X-5, D-558-2, and X-4.

Testing of the Ascent Thrust Vector Control System in support of the Ares 1-X program at the Marshall Space Flight Center in Huntsville, Alabama. This image is extracted from a high definition video file and is the highest resolution available

Shown is testing of a 3.5% Ares 1-X buffet model at the transonic wind tunnel at Langley Research Center, Virginia in support of the Ares/Constellation program. This image is extracted from high definition video and is the highest resolution available

Shown is testing of a 3.5% Ares 1-X buffet model at the transonic wind tunnel at Langley Research Center, Virginia in support of the Ares/Constellation program. This image is extracted from high definition video and is the highest resolution available.

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, the crawler-transporter is underneath the mobile launcher platform to move it from Kennedy's Launch Pad 39B to the Vehicle Assembly Building's High Bay 3 in preparation for the Ares I-X flight test this summer. The platform was turned over from the shuttle program to the Constellation Program last month. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The platform was moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, the mobile launcher platform that was turned over from the shuttle program to the Constellation Program last month is being moved from Kennedy's Launch Pad 39B via the crawler-transporter underneath. The platform will be rolled into the Vehicle Assembly Building's High Bay 3 in preparation for the Ares I-X flight test this summer. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The platform was moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, a water truck sprays the dry crawlerway in front of the crawler-transporter carrying the mobile launcher platform on top as it moves away from Kennedy's Launch pad 39B. The platform, turned over from the shuttle program to the Constellation Program last month, will be rolled into the Vehicle Assembly Building's High Bay 3 in preparation for the Ares I-X flight test this summer. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The platform was moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, the mobile launcher platform that was turned over from the shuttle program to the Constellation Program last month moves along the crawlerway via the crawler-transporter underneath. In the background is the Vehicle Assembly Building. The platform will be rolled into the VAB's High Bay 3 in preparation for the Ares I-X flight test this summer. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The platform was moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – A worker is dwarfed by the giant crawler-transporter and mobile launcher platform moving along the crawlerway toward the Vehicle Assembly Building. The platform will be rolled into the VAB's High Bay 3 in preparation for the Ares I-X flight test this summer. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The platform was moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, the mobile launcher platform that was turned over from the shuttle program to the Constellation Program last month moves off Kennedy's Launch Pad 39B via the crawler-transporter underneath. The platform will be rolled into the Vehicle Assembly Building's High Bay 3 in preparation for the Ares I-X flight test this summer. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The platform was moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, a water truck continues to spray the dry crawlerway in front of the crawler-transporter as it moves the mobile launcher platform on top away from Kennedy's Launch pad 39B. The platform, turned over from the shuttle program to the Constellation Program last month, will be rolled into the Vehicle Assembly Building's High Bay 3 in preparation for the Ares I-X flight test this summer. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The platform was moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, the mobile launcher platform that was turned over from the shuttle program to the Constellation Program last month is being moved from Kennedy's Launch Pad 39B via the crawler-transporter underneath. Here, the platform and crawler can be seen straddling the flame trench on the launch pad. The platform will be rolled into the Vehicle Assembly Building's High Bay 3 in preparation for the Ares I-X flight test this summer. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. Ground Control System hardware was installed in MLP-1 in December 2008. The platform was moved to the launch pad to check out the installed hardware with the Launch Control Center Firing Room 1 equipment, using the actual circuits that will be used when the fully stacked Ares I-X vehicle is rolled out later this year for launch. Photo credit: NASA/Kim Shiflett

The DARPA/U.S. Air Force X-45A Unmanned Combat Air Vehicle (UCAV) system demonstration program completed the first phase of demonstrations, known as Block I, on Feb. 28, 2003. The final Block I activities included two flights at Dryden, during which safe operation of the weapons bay door was verified at 35,000 feet and speeds of Mach 0.75, the maximum planned altitude and speed for the two X-45A demonstrator vehicles.

The DARPA/U.S. Air Force X-45A Unmanned Combat Air Vehicle (UCAV) system demonstration program completed the first phase of demonstrations, known as Block I, on Feb. 28, 2003. The final Block I activities included two flights at Dryden, during which safe operation of the weapons bay door was verified at 35,000 feet and speeds of Mach 0.75, the maximum planned altitude and speed for the two X-45A demonstrator vehicles.

The DARPA/U.S. Air Force X-45A Unmanned Combat Air Vehicle (UCAV) system demonstration program completed the first phase of demonstrations, known as Block I, on Feb. 28, 2003. The final Block I activities included two flights at Dryden, during which safe operation of the weapons bay door was verified at 35,000 feet and speeds of Mach 0.75, the maximum planned altitude and speed for the two X-45A demonstrator vehicles.

The DARPA/U.S. Air Force X-45A Unmanned Combat Air Vehicle (UCAV) system demonstration program completed the first phase of demonstrations, known as Block I, on Feb. 28, 2003. The final Block I activities included two flights at Dryden, during which safe operation of the weapons bay door was verified at 35,000 feet and speeds of Mach 0.75, the maximum planned altitude and speed for the two X-45A demonstrator vehicles.

The DARPA/U.S. Air Force X-45A Unmanned Combat Air Vehicle (UCAV) system demonstration program completed the first phase of demonstrations, known as Block I, on Feb. 28, 2003. The final Block I activities included two flights at Dryden, during which safe operation of the weapons bay door was verified at 35,000 feet and speeds of Mach 0.75, the maximum planned altitude and speed for the two X-45A demonstrator vehicles.

This image of the suspected Black Hole, Cygnus X-1, was the first object seen by the High Energy Astronomy Observatory (HEAO)-2/Einstein Observatory. According to the theories to date, one concept of a black hole is a star, perhaps 10 times more massive than the Sun, that has entered the last stages of stelar evolution. There is an explosion triggered by nuclear reactions after which the star's outer shell of lighter elements and gases is blown away into space and the heavier elements in the stellar core begin to collapse upon themselves. Once this collapse begins, the inexorable force of gravity continues to compact the material until it becomes so dense it is squeezed into a mere point and nothing can escape from its extreme gravitational field, not even light. The HEAO-2, the first imaging and largest x-ray telescope built to date, was capable of producing actual photographs of x-ray objects. Shortly after launch, the HEAO-2 was nicknamed the Einstein Observatory by its scientific experimenters in honor of the centernial of the birth of Albert Einstein, whose concepts of relativity and gravitation have influenced much of modern astrophysics, particularly x-ray astronomy.

In the center foreground of this 1953 hangar photo is the YF-84A (NACA 134/Air Force 45-59490) used for vortex generator research. It arrived on November 28, 1949, and departed on April 21, 1954. Beside it is the third D-558-1 aircraft (NACA 142/Navy 37972). This aircraft was used for a total of 78 transonic research flights from April 1949 to June 1954. It replaced the second D-558-1, lost in the crash which killed Howard Lilly. Just visible on the left edge is the nose of the first D-558-2 (NACA 143/Navy 37973). Douglas turned the aircraft over to NACA on August 31, 1951, after the contractor had completed its initial test flights. NACA only made a single flight with the aircraft, on September 17, 1956, before the program was cancelled. In the center of the photo is the B-47A (NACA 150/Air Force 49-1900). The B-47 jet bomber, with its thin, swept-back wings, and six podded engines, represented the state of the art in aircraft design in the early 1950s. The aircraft undertook a number of research activities between May 1953 and its 78th and final research flight on November 22, 1957. The tests showed that the aircraft had a buffeting problem at speeds above Mach 0.8. Among the pilots who flew the B-47 were later X-15 pilots Joe Walker, A. Scott Crossfield, John B. McKay, and Neil A. Armstrong. On the right side of the B-47 is NACA's X-1 (Air Force 46-063). The second XS-1 aircraft built, it was fitted with a thicker wing than that on the first aircraft, which had exceeded Mach 1 on October 14, 1947. Flight research by NACA pilots indicated that this thicker wing produced 30 percent more drag at transonic speeds compared to the thinner wing on the first X-1. After a final flight on October 23, 1951, the aircraft was grounded due to the possibility of fatigue failure of the nitrogen spheres used to pressurize the fuel tanks. At the time of this photo, in 1953, the aircraft was in storage. In 1955, the aircraft was extensively modified, becoming the X-1E. In front o

This photograph was taken during the integration of the Astro-1 mission payloads at the Kennedy Space Center on March 20, 1990, showing the Broad Band X-Ray Telescope (BBXRT) at the left, as three telescopes for the Astro-1 Observatory are settled into the Orbiter Columbia payload bay. Above Earth's atmospheric interference, Astro-1 would make precise measurements of objects such as planets, stars, and galaxies in relatively small fields of view and would observe and measure ultraviolet radiation from celestial objects. The Astro-1 used a Spacelab pallet system with an instrument pointing system and a cruciform structure for bearing the three ultraviolet instruments mounted in a parallel configuration. The three instruments were: The Hopkins Ultraviolet Telescope (HUT), which was designed to obtain far-ultraviolet spectroscopic data from white dwarfs, emission nebulae, active galaxies, and quasars; the Wisconsin Ultraviolet Photo-Polarimeter Experiment (WUPPE) which was to study polarized ultraviolet light from magnetic white dwarfs, binary stars, reflection nebulae, and active galaxies; and the Ultraviolet Imaging Telescope (UIT), which was to record photographic images in ultraviolet light of galaxies, star clusters, and nebulae. The star trackers that supported the instrument pointing system, were also mounted on the cruciform. Also in the payload bay was the Broad Band X-Ray Telescope (BBXRT), which was designed to obtain high-resolution x-ray spectra from stellar corona, x-ray binary stars, active galactic nuclei, and galaxy clusters. Managed by the Marshall Space Flight Center, the Astro-1 observatory was launched aboard the Space Shuttle Orbiter Columbia (STS-35) on December 2, 1990.
This false-color image shows comet Tempel 1 as seen by NASA Chandra X-ray Observatory on June 30, 2005, Universal Time. The comet was bright and condensed.

Ares 1-X Project US-1 Segment

The X-1E guards NASA Dryden Flight Research Center's main building.

Ares 1-X segment US-3 being lifted onto the cart prior to being stacked onto US-2 to start forming the Ares 1-X USS Super Stack

SPACE X FALCON 9 COTS-1 TEST FIRE - DAY 1

SPACE X FALCON 9 COTS-1 TEST FIRE - DAY 1

A port is cut into the side of the Ares 1-X, IS-1 segment

A port is cut into the side of the Ares 1-X, IS-1 segment

SPACE X FALCON 9 COTS-1 TEST FIRE - DAY 1

SPACE X FALCON 9 COTS-1 TEST FIRE - DAY 1

Ares 1-X IS-1 Segment's door being heat treated for welding

SPACE X FALCON 9 COTS-1 TEST FIRE DAY 1

SPACE X FALCON 9 COTS-1 TEST FIRE DAY 1

A port is cut into the side of the Ares 1-X, IS-1 segment

Ares 1-X Welders

Ares 1-X Welders

Media Day for Ares 1-X

Ares 1-X Segment Manufacturing

Media Day for Ares 1-X

Media Day for Ares 1-X

Media Day for Ares 1-X

NACA High Speed Flight Station aircraft at South Base. Clockwise from far left: D-558-II, XF-92A, X-5, X-1, X-4, and D-558-I.

Ares 1-X segment ballast fit check

Loading and Departure of the Ares 1-X segments

Loading and Departure of the Ares 1-X segments

Interior Hardware Fabrication for Ares 1-X Segments

Loading and Departure of the Ares 1-X segments

Loading and Departure of the Ares 1-X segments

Loading and Departure of the Ares 1-X segments

Interior Hardware Fabrication for Ares 1-X Segments

INDIVIDUAL PITOT PROBE - 1 FT X 1 FT WIND TUNNEL PRESSURE RAKE

PV-1 model; rear view with 2 1/2' x 2 1/2' trubulene net mount in the 7x10ft w.t. at Ames Research Center

Originally devised to observe Saturn stage separation during Apollo flights, Marshall Space Flight Center's Miniature Television Camera, measuring only 4 x 3 x 1 1/2 inches, quickly made its way to the commercial telecommunications market.

Operation to stack Ares 1-X Segment US5 onto US4

Operation to stack Ares 1-X Segment US5 onto US4

Operation to stack Ares 1-X Segment US5 onto US4

Operation to stack Ares 1-X Segment US5 onto US4

Operation to stack Ares 1-X Segment US5 onto US4

Ballast can installation into Ares 1-X Segment US-7

Operation to stack Ares 1-X Segment US5 onto US4

Sound test checking welding on an Area 1-X segment

Operation to stack Ares 1-X Segment US5 onto US4

SPACE X FALCON 9 COTS-1 TEST FIRE - DAY 2

Ares 1-X being lowered on the SSAS (Super Structure Assembly Stand)

Operation to stack Ares 1-X Segment US5 onto US4

SPACE X FALCON 9 COTS-1 TEST FIRE - DAY 2

SPACE X FALCON 9 COTS-1 TEST FIRE - DAY 2

Operation to stack Ares 1-X Segment US5 onto US4

Operation to stack Ares 1-X Segment US5 onto US4