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

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

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.

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

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

Yesterday, the four-person Artemis 2 crew completed the first crewed lunar flyby since Apollo 17 in 1972, passing within roughly 4,067 miles of the lunar surface before turning back toward Earth. The ...

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

Exciting planetary action takes place this month. Venus and Uranus vie for attention and lie close to each other in late April. Jupiter offers a lot to observe through a telescope, particularly events ...

As the familiar wintertime constellations begin setting earlier each evening, it’s our last chance to catch some of the deep-sky treasures they contain. The constellation Monoceros lies east of better ...

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 ...

NASA's Artemis 2 takes center stage this week as four astronauts prepare to become the first humans to travel to the Moon since 1972. SpaceX continues its Starlink cadence, while Russia's new Soyuz 5 ...