Two of Pluto's midsize moons may be made of the guts of its largest moon, Charon, new research suggests.

Astronomer and Pluto mission leader S. Alan Stern explores how the field has transformed during his decades-long career.

The New Horizons station is the first man-made object to reach Pluto. Till now, an incredibly distant and barely seen by ...

Astronomers say they have evidence that there may be a hidden planet in our Solar System. Named 'Planet Y', the Earth-sized ...

While there’s no direct evidence of extraterrestrial life on Ceres (or anyplace but Earth), a new study published in Science Advances suggests Ceres may have had conditions suitable for life between 4 ...

September is the Autumnal Equinox — the beginning of fall — in the Northern Hemisphere. Here’s a look at “What’s up in the sky” in the D.C. region this month.

The European Space Agency (ESA) is stepping up its efforts to compete with the likes of SpaceX and the American commercial ...

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The upcoming total lunar eclipse over Asia and the partial solar eclipse over Antarctica occurring in September will be ...

Think you know Pluto? From icy plains to planetary debates, this quiz dives deep into the mysteries of our solar system’s most controversial—and captivating—dwarf planet.

Today, let's talk about an extremely mysterious celestial body in the solar system — Sedna. Did you know that it takes Sedna ...

NASA research reveals that the heliosphere, our solar system's protective bubble, may resemble a deflated croissant rather than a comet. This new mode ...