Miloslav Stašek, Ambassador of the Czech Republic to the United States, delivers remarks prior to the signing of the Artemis Accords by Foreign Affairs Minister for the Czech Republic, Jan Lipavský, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Foreign Affairs Minister for the Czech Republic, Jan Lipavský, delivers remarks prior to the signing of the Artemis Accords, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Foreign Affairs Minister for the Czech Republic, Jan Lipavský, speaks to members of the media following the signing of the Artemis Accords, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Jackie McGuinness, NASA’s Press Secretary, provides opening remarks prior to the signing of the Artemis Accords by Foreign Affairs Minister for the Czech Republic, Jan Lipavský, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson delivers remarks prior to the signing of the Artemis Accords by Foreign Affairs Minister for the Czech Republic, Jan Lipavský, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Foreign Affairs Minister for the Czech Republic, Jan Lipavský, speaks to members of the media following the signing of the Artemis Accords, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Acting Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs Jennifer R. Littlejohn, delivers remarks prior to the signing of the Artemis Accords by Foreign Affairs Minister for the Czech Republic, Jan Lipavský, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Miloslav Stašek, Ambassador of the Czech Republic to the United States, left, Foreign Affairs Minister for the Czech Republic, Jan Lipavský, second from left, NASA Administrator Bill Nelson, second from right, and Acting Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs Jennifer R. Littlejohn, right, are seen following the signing of the Artemis Accords by the Czech Republic, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Miloslav Stašek, Ambassador of the Czech Republic to the United States, delivers remarks prior to the signing of the Artemis Accords as Foreign Affairs Minister for the Czech Republic, Jan Lipavský, third from right, NASA Administrator Bill Nelson, second from right, and Acting Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs Jennifer R. Littlejohn, right, look on, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Foreign Affairs Minister for the Czech Republic, Jan Lipavský deliver remarks prior to the signing of the Artemis Accords as Miloslav Stašek, Ambassador of the Czech Republic to the United States, second from left, NASA Administrator Bill Nelson, second from right, and Acting Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs Jennifer R. Littlejohn, right, look on, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Acting Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs Jennifer R. Littlejohn, delivers remarks prior to the signing of the Artemis Accords as Miloslav Stašek, Ambassador of the Czech Republic to the United States, second from left, Foreign Affairs Minister for the Czech Republic, Jan Lipavský, second from right, and NASA Administrator Bill Nelson, right, look on, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, delivers remarks prior to the signing of the Artemis Accords as Miloslav Stašek, Ambassador of the Czech Republic to the United States, second from left, Foreign Affairs Minister for the Czech Republic, Jan Lipavský, second from right, and Acting Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs Jennifer R. Littlejohn, right, look on, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, center, speaks with Miloslav Stašek, Ambassador of the Czech Republic to the United States, Foreign Affairs Minister for the Czech Republic, Jan Lipavský, and Acting Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs Jennifer R. Littlejohn, in the Space Operations Center following the signing of the Artemis Accords, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Foreign Affairs Minister for the Czech Republic, Jan Lipavský, left, signs the Artemis Accords, as NASA Administrator Bill Nelson looks on, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson presents Foreign Affairs Minister for the Czech Republic Jan Lipavský with a signed photograph of the Orion spacecraft against the Moon and Earth following the signing of the Artemis Accords on, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Foreign Affairs Minister for the Czech Republic Jan Lipavský, looks at a model of the International Space Station during a tour of the Space Operations Center following the signing of the Artemis Accords, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson left, and Foreign Affairs Minister for the Czech Republic Jan Lipavský, center are seen in the Space Operations Center during a tour following the signing of the Artemis Accords, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson right, and Foreign Affairs Minister for the Czech Republic Jan Lipavský are seen in the Space Operations Center during a tour following the signing of the Artemis Accords, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, points to a ground track map for the International Space Station in the Space Operations Center during a tour with Miloslav Stašek, Ambassador of the Czech Republic to the United States, Foreign Affairs Minister for the Czech Republic, Jan Lipavský, and Acting Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs Jennifer R. Littlejohn, following the signing of the Artemis Accords, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, second from right, Martin Kupka, Minister of Transport for the Czech Republic, and Ambassador of the Czech Republic to the United States Miloslav Stašek are seen during a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, right, Martin Kupka, Minister of Transport for the Czech Republic, and Ambassador of the Czech Republic to the United States Miloslav Stašek are seen during a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, Martin Kupka, Minister of Transport for the Czech Republic, and Ambassador of the Czech Republic to the United States Miloslav Stašek are seen during a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

Foreign Affairs Minister for the Czech Republic Jan Lipavský, left, presents NASA Administrator Bill Nelson with a reproduction of an original drawing made by a Czechoslovak boy named Petr Ginz of partial Jewish background who was murdered at Auschwitz concentration camp in 1944, despite being of very young age, he had authored novels and made his own illustrations including this one depicting planet Earth seen from the moon, following the signing of the Artemis Accords, Wednesday, May 3, 2023, at The Mary W. Jackson NASA Headquarters building in Washington DC. The Czech Republic is the twenty fourth country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, and Martin Kupka, Minister of Transport for the Czech Republic, shakes hands as they meet at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, and Martin Kupka, Minister of Transport for the Czech Republic, speak to members of the media before a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, and Martin Kupka, Minister of Transport for the Czech Republic, pose for a picture ahead of a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

Meredith McKay, deputy associate administrator for International and Interagency Relations, left, NASA Administrator Bill Nelson, center, and Martin Kupka, Minister of Transport for the Czech Republic, are seen during a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, and Martin Kupka, Minister of Transport for the Czech Republic, are seen during a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, right and Martin Kupka, Minister of Transport for the Czech Republic, speak ahead of a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, right, and Martin Kupka, Minister of Transport for the Czech Republic, are seen during a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, and Martin Kupka, Minister of Transport for the Czech Republic, are seen during a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, speaks with Martin Kupka, Minister of Transport for the Czech Republic, about the Mars Helicopter Ingenuity as he holds a rotor blade representative of the one on the craft on Mars during a meeting at the Mary W. Jackson NASA Headquarters building, Monday, Jan. 22, 2024, in Washington. Photo Credit: (NASA/Joel Kowsky)

iss073e0988954 (Oct. 30, 2025) --- An orbital sunrise illuminates Earth's atmosphere and cloud tops in this photograph captured from the International Space Station as it orbited 264 miles above the Czech Republic in Eastern Europe.

This collage represents a selection of planetary radar observations of asteroid 2008 OS7 that were made the day before its close approach with our planet on Feb. 2, 2024. The stadium-size near-Earth object passed at a distance of about 1.8 million miles (2.9 million kilometers, or 7 ½ times the distance between Earth and the Moon). Scientists at NASA's Jet Propulsion Laboratory used the powerful 230-foot (70-meter) Goldstone Solar System Radar antenna at the Deep Space Network's facility near Barstow, California, to capture these images. The observations will help scientists better understand the asteroid's size, rotation, shape, and surface details. Until this close approach, very little was known about 2008 OS7 as it has been too distant for planetary radar to image it. The asteroid was discovered on July 30, 2008, during routine search operations for NEOs by the NASA-funded Catalina Sky Survey, which is headquartered at the University of Arizona in Tucson. Observations revealed that the asteroid is comparatively slow rotating, completing one rotation every 29 ½ hours. The rotational period of 2008 OS7 was determined Petr Pravec, at the Astronomical Institute of the Czech Academy of Sciences in Ondřejov, Czech Republic, who observed the asteroid's light curve – or how the brightness of the object changes over time. As the asteroid spins, variations on its shape can change the brightness of reflected light astronomers can see, and those changes can be recorded to understand the period of the asteroid's rotation. The Goldstone observations confirm the asteroid's uncommonly slow rotation. https://photojournal.jpl.nasa.gov/catalog/PIA26149

This collage and animation represent NASA radar observations of near-Earth asteroid 7335 1989 JA on May 26, 2022, one day before it made its closest approach with Earth. The potentially hazardous asteroid came within 2.5 million miles (4 million kilometers) of our planet, or 10.5 times the distance between the Earth and the Moon. Astronomers at NASA's Jet Propulsion Laboratory used the 230-foot (70-meter) radio antenna at the Deep Space Network's Goldstone Deep Space Communications Complex near Barstow, California, to precisely track the asteroid's motion and obtain detailed radar images. 1989 JA is a binary system, consisting of a large asteroid and a significantly smaller satellite asteroid that revolve around each other without touching. The larger asteroid is about 0.4 miles (700 meters) across and shows several topographic features as it rotates. The secondary asteroid, which was discovered this year, is between 100 and 200 meters in diameter and has an orbital period of about 17 hours. 1989 JA was discovered by Eleanor F. Helin at Palomar Observatory in Southern California on May 1, 1989. Follow-up radar observations that year did not reveal a satellite. In 2010, NASA's Wide-field Infrared Survey Explorer (WISE) was used to help determine the primary asteroid's size. This year, a few weeks before the asteroid's most recent close approach, astronomers at Ondrejov Observatory in the Czech Republic measured the asteroid's light curve (the change in reflected light intensity over time) and found hints of the satellite in orbit. The new Goldstone observations refined the size of 1989 JA and established that it is a binary system. 1989 JA does not currently pose an impact risk to Earth, but observations by planetary radar can help astronomers better understand its orbit around the Sun so that any future risk can be continually assessed. https://photojournal.jpl.nasa.gov/catalog/PIA25251