These composite images show a suspected plume of material erupting two years apart from the same location on Jupiter's icy moon Europa. The images bolster evidence that the plumes are a real phenomenon, flaring up intermittently in the same region on the satellite. Both plumes, photographed in ultraviolet light by NASA's Hubble's Space Telescope Imaging Spectrograph, were seen in silhouette as the moon passed in front of Jupiter. The newly imaged plume, shown at right, rises about 62 miles (100 kilometers) above Europa's frozen surface. The image was taken Feb. 22, 2016. The plume in the image at left, observed by Hubble on March 17, 2014, originates from the same location. It is estimated to be about 30 miles (50 kilometers) high. The snapshot of Europa, superimposed on the Hubble image, was assembled from data from NASA's Galileo mission to Jupiter. The plumes correspond to the location of an unusually warm spot on the moon's icy crust, seen in the late 1990s by the Galileo spacecraft (see PIA21444). Researchers speculate that this might be circumstantial evidence for water venting from the moon's subsurface. The material could be associated with the global ocean that is believed to be present beneath the frozen crust. https://photojournal.jpl.nasa.gov/catalog/PIA21443

NASA Great Observatories continue Galileo legacy with stunning images and breakthrough science from the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory.

Jupiter White Ovals

This graphic shows the location of water vapor detected over Europa south pole in observations taken by NASA Hubble Space Telescope in December 2012. This is the first strong evidence of water plumes erupting off Europa surface.

Cold Hole Over Jupiter Pole

This composite image shows suspected plumes of water vapor erupting at the 7 o’clock position off the limb of Jupiter’s moon Europa. The plumes, photographed by NASA’s Hubble’s Space Telescope Imaging Spectrograph, were seen in silhouette as the moon passed in front of Jupiter. Hubble’s ultraviolet sensitivity allowed for the features -- rising over 100 miles (160 kilometers) above Europa’s icy surface -- to be discerned. The water is believed to come from a subsurface ocean on Europa. The Hubble data were taken on January 26, 2014. The image of Europa, superimposed on the Hubble data, is assembled from data from the Galileo and Voyager missions.

These images of the surface of the Jovian moon Europa, taken by NASA's Galileo spacecraft, focus on a "region of interest" on the icy moon. The image at left traces the location of the erupting plumes of material, observed by NASA's Hubble Space Telescope in 2014 and again in 2016. The plumes are located inside the area surrounded by the green oval. The green oval also corresponds to a warm region on Europa's surface, as identified by the temperature map at right. The map is based on observations by the Galileo spacecraft. The warmest area is colored bright red. Researchers speculate these data offer circumstantial evidence for unusual activity that may be related to a subsurface ocean on Europa. The dark circle just below center in both images is a crater and is not thought to be related to the warm spot or the plume activity. https://photojournal.jpl.nasa.gov/catalog/PIA21444

This graphic illustrates the main science objectives of NASA's Europa Clipper mission to Jupiter's moon Europa: to understand the nature of Europa's icy shell and confirm the existence of a subsurface ocean, investigate Europa's composition, characterize its geology, and determine the level of activity, such as possible water plumes. Clockwise from top left: an artist's concept of Europa's interior, which likely contains a global ocean beneath the icy surface, with possible hydrothermal activity on the ocean floor; water signatures at Europa's Manannán Crater made visible by mapping colors onto infrared data from NASA's Galileo mission to Jupiter; ultraviolet observations by the Hubble Space Telescope showing evidence of a possible plume at Europa and indicating possible activity at the moon; and a color view of Europa's Conamara Chaos region based on an image from NASA's Galileo mission. Europa Clipper's three main science objectives are to determine the thickness of the moon's icy shell and its interactions with the ocean below, to investigate its composition, and to characterize its geology. The mission's detailed exploration of Europa will help scientists better understand the astrobiological potential for habitable worlds beyond our planet. https://photojournal.jpl.nasa.gov/catalog/PIA26461

Data from NASA's Galileo spacecraft were used to produce this false-color composite of Jupiter's northern aurora on the night side of the planet. The height of the aurora, the thickness of the auroral arc, and the small-scale structure are revealed for the first time. Images in Galileo's red, green, and clear filters are displayed in red, green, and blue respectively. The smallest resolved features are tens of kilometers in size, which is a ten-fold improvement over Hubble Space Telescope images and a hundred-fold improvement over ground-based images. The glow is caused by electrically charged particles impinging on the atmosphere from above. The particles travel along Jupiter's magnetic field lines, which are nearly vertical at this latitude. The auroral arc marks the boundary between the "closed" field lines that are attached to the planet at both ends and the "open" field lines that extend out into interplanetary space. At the boundary the particles have been accelerated over the greatest distances, and the glow is especially intense. The latitude-longitude lines refer to altitudes where the pressure is 1 bar. The image shows that the auroral emissions originate about 500 kilometers (about 310 miles) above this surface. The colored background is light scattered from Jupiter's bright crescent, which is out of view to the right. North is at the top. The images are centered at 57 degrees north and 184 degrees west and were taken on April 2, 1997 at a range of 1.7 million kilometers (1.05 million miles) by Galileo's Solid State Imaging (SSI) system. http://photojournal.jpl.nasa.gov/catalog/PIA00603

CAPE CANAVERAL, Fla. -- This orbiter tribute of space shuttle Atlantis, or OV-104, hangs in Firing Room 4 of the Launch Control Center at NASA's Kennedy Space Center in Florida. In the lower-left corner, it features Atlantis soaring above Earth and threaded through the design are the mission patches for each of Atlantis’ flights. Atlantis' accomplishments include seven missions to the Russian space station Mir and several assembly, construction and resupply missions to the International Space Station. Atlantis also flew the last Hubble Space Telescope servicing mission on STS-125. In the tribute, the planet Venus represents the Magellan probe being deployed during STS-30, and Jupiter represents the Galileo probe being deployed during STS-34. The inset photos illustrate various aspects of shuttle processing as well as significant achievements, such as the glass cockpit and the first shuttle docking with Mir during STS-71. The inset photo in the upper-left corner shows a rainbow over Atlantis on Launch Pad 39A and shuttle Endeavour on Launch Pad 39B at Kennedy. Endeavour was the assigned vehicle had Atlantis’ STS-125 mission needed rescue, and this was the last time both launch pads were occupied at the same time. The stars in the background represent the many people who have worked with Atlantis and their contributions to the vehicle’s success. Graphic design credit: NASA/Amy Lombardo

CAPE CANAVERAL, Fla. -- This is a printable version of space shuttle Atlantis' orbiter tribute, or OV-104, which hangs in Firing Room 4 of the Launch Control Center at NASA's Kennedy Space Center in Florida. In 2011, the tribute was updated to reflect the addition of one more flight -- STS-135 -- which will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. In the lower-left corner, it features Atlantis soaring above Earth and threaded through the design are the mission patches for each of Atlantis’ flights. Atlantis' accomplishments include seven missions to the Russian space station Mir and several assembly, construction and resupply missions to the International Space Station. Atlantis also flew the last Hubble Space Telescope servicing mission on STS-125. In the tribute, the planet Venus represents the Magellan probe being deployed during STS-30, and Jupiter represents the Galileo probe being deployed during STS-34. The inset photos illustrate various aspects of shuttle processing as well as significant achievements, such as the glass cockpit and the first shuttle docking with Mir during STS-71. The inset photo in the upper-left corner shows a rainbow over Atlantis on Launch Pad 39A and shuttle Endeavour on Launch Pad 39B at Kennedy. Endeavour was the assigned vehicle had Atlantis’ STS-125 mission needed rescue, and this was the last time both launch pads were occupied at the same time. The stars in the background represent the many people who have worked with Atlantis and their contributions to the vehicle’s success. Graphic design credit: NASA/Amy Lombardo. NASA publication number: SP-2010-08-161-KSC

CAPE CANAVERAL, Fla. -- This orbiter tribute of space shuttle Atlantis, or OV-104, hangs in Firing Room 4 of the Launch Control Center at NASA's Kennedy Space Center in Florida. In 2011, the tribute was updated to reflect the addition of one more Atlantis flight -- STS-135 -- which will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. In the lower-left corner, it features Atlantis soaring above Earth and threaded through the design are the mission patches for each of Atlantis’ flights. Atlantis' accomplishments include seven missions to the Russian space station Mir and several assembly, construction and resupply missions to the International Space Station. Atlantis also flew the last Hubble Space Telescope servicing mission on STS-125. In the tribute, the planet Venus represents the Magellan probe being deployed during STS-30, and Jupiter represents the Galileo probe being deployed during STS-34. The inset photos illustrate various aspects of shuttle processing as well as significant achievements, such as the glass cockpit and the first shuttle docking with Mir during STS-71. The inset photo in the upper-left corner shows a rainbow over Atlantis on Launch Pad 39A and shuttle Endeavour on Launch Pad 39B at Kennedy. Endeavour was the assigned vehicle had Atlantis’ STS-125 mission needed rescue, and this was the last time both launch pads were occupied at the same time. The stars in the background represent the many people who have worked with Atlantis and their contributions to the vehicle’s success. Graphic design credit: NASA/Amy Lombardo. NASA publication number: SP-2010-08-161-KSC

CAPE CANAVERAL, Fla. -- This is a version of space shuttle Atlantis' orbiter tribute, or OV-104, which hangs in Firing Room 4 of the Launch Control Center at NASA's Kennedy Space Center in Florida. In 2011, the tribute was updated to reflect the addition of one more Atlantis flight -- STS-135 -- which will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. In the lower-left corner, it features Atlantis soaring above Earth and threaded through the design are the mission patches for each of Atlantis’ flights. Atlantis' accomplishments include seven missions to the Russian space station Mir and several assembly, construction and resupply missions to the International Space Station. Atlantis also flew the last Hubble Space Telescope servicing mission on STS-125. In the tribute, the planet Venus represents the Magellan probe being deployed during STS-30, and Jupiter represents the Galileo probe being deployed during STS-34. The inset photos illustrate various aspects of shuttle processing as well as significant achievements, such as the glass cockpit and the first shuttle docking with Mir during STS-71. The inset photo in the upper-left corner shows a rainbow over Atlantis on Launch Pad 39A and shuttle Endeavour on Launch Pad 39B at Kennedy. Endeavour was the assigned vehicle had Atlantis’ STS-125 mission needed rescue, and this was the last time both launch pads were occupied at the same time. The stars in the background represent the many people who have worked with Atlantis and their contributions to the vehicle’s success. Graphic design credit: NASA/Amy Lombardo. NASA publication number: SP-2010-08-161-KSC

CAPE CANAVERAL, Fla. -- This is a version of space shuttle Atlantis' orbiter tribute, or OV-104, which hangs in Firing Room 4 of the Launch Control Center at NASA's Kennedy Space Center in Florida. In the lower-left corner, it features Atlantis soaring above Earth and threaded through the design are the mission patches for each of Atlantis’ flights. Atlantis' accomplishments include seven missions to the Russian space station Mir and several assembly, construction and resupply missions to the International Space Station. Atlantis also flew the last Hubble Space Telescope servicing mission on STS-125. In the tribute, the planet Venus represents the Magellan probe being deployed during STS-30, and Jupiter represents the Galileo probe being deployed during STS-34. The inset photos illustrate various aspects of shuttle processing as well as significant achievements, such as the glass cockpit and the first shuttle docking with Mir during STS-71. The inset photo in the upper-left corner shows a rainbow over Atlantis on Launch Pad 39A and shuttle Endeavour on Launch Pad 39B at Kennedy. Endeavour was the assigned vehicle had Atlantis’ STS-125 mission needed rescue, and this was the last time both launch pads were occupied at the same time. The stars in the background represent the many people who have worked with Atlantis and their contributions to the vehicle’s success. Graphic design credit: NASA/Amy Lombardo. NASA publication number: SP-2010-08-161-KSC

CAPE CANAVERAL, Fla. -- This is a printable version of space shuttle Atlantis' orbiter tribute, or OV-104, which hangs in Firing Room 4 of the Launch Control Center at NASA's Kennedy Space Center in Florida. In the lower-left corner, it features Atlantis soaring above Earth and threaded through the design are the mission patches for each of Atlantis’ flights. Atlantis' accomplishments include seven missions to the Russian space station Mir and several assembly, construction and resupply missions to the International Space Station. Atlantis also flew the last Hubble Space Telescope servicing mission on STS-125. In the tribute, the planet Venus represents the Magellan probe being deployed during STS-30, and Jupiter represents the Galileo probe being deployed during STS-34. The inset photos illustrate various aspects of shuttle processing as well as significant achievements, such as the glass cockpit and the first shuttle docking with Mir during STS-71. The inset photo in the upper-left corner shows a rainbow over Atlantis on Launch Pad 39A and shuttle Endeavour on Launch Pad 39B at Kennedy. Endeavour was the assigned vehicle had Atlantis’ STS-125 mission needed rescue, and this was the last time both launch pads were occupied at the same time. The stars in the background represent the many people who have worked with Atlantis and their contributions to the vehicle’s success. Graphic design credit: NASA/Amy Lombardo. NASA publication number: SP-2010-08-161-KSC