For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

Because Pluto is so dim, you need a telescope to see it. “A backyard telescope could do it under the right conditions,” says ...

The discovery was made by astronomers using the Subaru Telescope, which is situated atop a dormant volcano in Hawaii.

Mercury is notoriously difficult to see from Earth, thanks to its proximity to the Sun. But on July 4, Mercury reaches its ...

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

It took over nine years for New Horizons to reach Pluto after blasting off atop an Atlas 5 rocket on Jan. 19, 2006. After ...

If it weren't for the new budget, New Horizons could keep exploring the outer reaches of the solar system into the 2030s.

No, you aren't imagining it. NASA has confirmed that the days are indeed getting shorter, as our planet spins faster than ever before.

A meteorite from Mars, the largest piece ever found on Earth, sold for $5.3 million to an anonymous bidder at a Sotheby's auction in New York on Wednesday.

A passing star could fling Earth out of orbit. Distant Pluto is in even bigger trouble, simulations suggest.

It was one of the most ambitious missions for NASA since the turn of the century, with photos reshaping what scientists know ...