To prepare for sending astronauts to Mars, NASA began taking applications Friday for four people to live for a year in Mars Dune Alpha.

'You can dislike Bezos’ politics - I do - but you cannot dismiss what he has accomplished. Or Elon Musk, or Richard Branson.'

It is a breathtakingly beautiful astronomical phenomenon that occurs when the moon’s orbit brings it directly between the sun and earth.

American science should be advanced in a reasonable manner, not with congressional bailouts for a billionaire's private space program.

'This is a very simple experiment with known input parameters that will allow us to quantify the flow of energy to the electrons.'

NASA and China get into a war of words over the uncontrolled re-entry of a 23-ton Chinese rocket boopster.

'What’s bad is that it’s really negligent on China’s part,' an astronomer said of the Chinese rocket expected to fall to Earth in three days.

Six decades after the first humans rocketed into space, commercial spaceflights are becoming a reality.

The National Space Council will continue, but now Kamala Harris will take hold of it. There were plenty of skeptics.

Michael Collins, one of the three astronauts who took part in the Apollo 11 mission, has died of cancer at age 90.