The answer: There are approximately 2,000,000,000,000 galaxies in the universe – that’s 2 trillion. Astronomers don’t know exactly how many stars are in each of those 2 trillion galaxies. Most are so ...

Space artists can sometimes stretch scientific data for a bigger visual bang. At New York's natural history museum, they ...

An accidental discovery in an astronomy show offers researchers a new clue about the mysterious Oort Cloud, a large expanse ...

NASA has just released a new documentary about the most powerful space telescope ever built, and you can watch it now.

Leo sees action as both Mars and Comet Schwassmann-Wachmann 1 move through; plus, spot galaxies and noctilucent clouds in the sky this week.

Astronomer Vera Rubin, now honored on a U.S. quarter, transformed our understanding of the universe by uncovering powerful ...

Mizar, a star in the Big Dipper's handle, has a tiny companion. This star, Alcor, was known to the ancients. The pair was ...

From a Mars rover selfie to an astronaut's view of the flower moon, these space images will give you a new perspective on our ...

Towards the end of the month, Mercury will be visible in the western horizon, the space agency said. Californians can observe ...

An accidental find during a planetarium show could potentially reshape scientists' understanding of the Oort Cloud, a ...

It turns out that looming collision between our Milky Way and Andromeda galaxies might not happen after all. Astronomers reported June 2 that the probability of the two spiral g ...