James McDivitt, a former NASA astronaut who commanded the Gemini IV and Apollo 9 missions, died in his sleep last week in Tucson, Arizona, NASA said in a statement Monday. He was 93. McDivitt was ...

When interstellar visitor 3I/ATLAS exhibited some peculiar movements, speculation arose regarding potential alien origins.

NASA and Gemini North reveal stunning new images of interstellar comet 3I/ATLAS glowing with an eerie green light. Discover ...

I/ATLAS, a rare visitor from beyond the Solar System, is drawing attention again after new data revealed dramatic activity on ...

While most attention surrounding Houston's role in getting Americans to the moon in the 1960s tends to center on the Apollo program, the one that preceded it tends to get short shrift. The Gemini ...

On Sept. 14, 1966, NASA's Gemini 11 mission set an all-time spaceflight altitude record when two astronauts reached an orbit of 850 miles above the Earth. This remains the highest altitude ever ...

One of the greatest achievements in human space flight is also one that history overlooks. After the Mercury program—when the U.S. first launched astronauts into space—and before the Apollo program, ...

Before the Apollo missions, there were the Mercury missions. Astronauts had to learn to walk before they could run. They had to be sure they could get into orbit, then back to Earth safely. They had ...