Astronomers have yet to find irrefutable proof for any natural satellites of exoplanets—so-called exomoons—but as ...

Astrophotographer Thierry Legault captured the International Space Station transit the Sun. The NASA astronauts were ...

"With these probability maps, we can push asteroids away while preventing them from returning on an impact trajectory, ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

With Pluto in Aquarius, the focus will be on democracy, technology, and social reform. Expect whistleblowers, reckonings, ...

A natural satellite is simply a celestial object that orbits a planet or a smaller body. Unlike the ones we build and send up ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

Astronomers detected a bright signal, coming from deep inside a dust disc, that is likely newborn planet HD 135344B still ...

Humans are finally building the technology that could tell us where to look, when to look, and what signs to watch for. What ...

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But mitigating this is its far greater distance, plus the fact that Earth appears much ...

WASHINGTON - Just as Earth orbits the sun, most planets discovered beyond our solar system orbit a host star. But some are out there all by themselves, called rogue planets. While their origins are ...

By fitting its sunshield and solar panels, engineers have completed the construction of Plato, the European Space Agency's ...