For a long time, it was thought that this [technique] required telescopes in space,” says John Mather, the Nobel ...

Crew begins a seven-hour lunar observation as NASA returns to the moon’s neighborhood for the first time in decades.

Follow along for live updates as Artemis 2 makes its closest approach to the Moon.

The Cygnus NG-24 resupply mission heads to the ISS, while SpaceX and Chinese launch providers round out a busy week.

The four crew members are closer to Luna than to our home world, right on course, and viewing parts of the Moon never before seen by humans.

The crew was overcome with emotion as they nominated the name Carroll for a crater "in a bright spot on the Moon." ...

On average, a planetary nebula should remain visible for some 25,000 years before its shell of gas becomes invisible.

Europa, now having reached the far western end of its orbit and heading back toward the planet, disappears in an occultation behind the disk of Jupiter at 11:30 P.M. EDT. If you can, get your ...

Our satellite is lining up to slide south of the bright red giant star Antares; catch the pair this morning in the predawn sky.

Billions of years ago, an enormous space rock struck Mars and excavated a 750-mile-wide (1,200 kilometers) crater now called the Isidis impact basin. But the cosmos wasn’t done yet. Another smaller ...

Mercury reaches greatest western elongation, standing 28° from the Sun at 7 P.M. EDT this evening. Now visible in the morning sky, the small planet glows at magnitude 0.4 and rises around 5:45 A.M.

In 1959, having determined that military test pilots would make the best astronauts, NASA began screening the records of 508 candidates. From there the group was narrowed to 110 men who went through ...