Editor's note: This article was updated March 25 at 11:40 a.m. ET to account for the recent discovery of new moons around Saturn and Jupiter. The total number of planetary moons and small-body ...

The Solar System has 8 planets, and each one is different. Earth has 5 oceans, thick air, forests, rivers, and more than 1.5 million known species. Venus is covered with toxic gases and has ...

To be a planet, NASA says an object must be big enough that its gravity has cleared away any other objects of a similar size near its orbit around the Sun. I can understand how something can clear ...

"I think these are not far-out type of ideas; they are not really futuristic ideas that we are talking about." ...

I recently received a query from one of my Atlantic Skies readers as to the difference between an occultation and an eclipse.

A giant planet nearly 700 light-years away has a bizarre daily weather cycle where mineral clouds appear every morning and ...

The atmosphere is between 5 million and 10 million times thinner than Earth's atmosphere. A very small body, far from the sun in an icy outer realm of the solar system, has mysteriously grown an ...

"Make Pluto a planet again," NASA administrator Jared Issaacman said in a Senate hearing last Tuesday. And lo, the Internet did rejoice. Two decades on from its original declassification as a ...

Neptune's mysterious, far-flung moon Nereid may be the last of the planet's original companions. Scientists at the California Institute of Technology reported Wednesday that they used NASA's Webb Spac ...

If you have kids in school, or even if you don’t, you’ve probably realized that there’s a lot about the day-to-day of school ...

Cuba is struggling with nationwide blackouts as the US’s effective oil blockade strangles fuel supplies. But the crisis may accelerate its clean energy revolution ...

Venus will join the moon May 18 in a cosmic event known as a conjunction. The meet-up presents spectators with a rare ...