New analysis of ALMA observations of interstellar comet 3I/ATLAS show its water carries a chemical signature pointing to a colder, more distant origin than any comet ever measured.

A crescent Moon guides the way to the Red Planet as galaxies glow and Venus stands between the horns of the Bull in the sky ...

M51 and M101. Although technically the same magnitude, one is more challenging than the other. Let’s take advantage of the moonless early-evening sky to enjoy two lovely face-on spiral galaxies. We’ll ...

Stars twinkle and sometimes appear to move around due to our atmosphere “scrambling” their light as it travels to our eyes.

Today in the history of astronomy, Hubble images a highly anticipated visitor from the outer solar system.

The Vespera II — X Edition from Vaonis, 'Cellarius Atlas' published by Taschen, and Celestron's NexYZ DX Smartphone Adapter ...

Although the Moon is bright, step outside early this morning to see if you can spot some fast-moving meteors left behind by ...

Dutch astronomer Willem de Sitter, born May 6, 1872, studied mathematics and physics at the University of Groningen, developing an interest in astronomy there and furthering it with work at Cape ...

Without our satellite, Earth’s geology, biology, and climate — even human philosophy — would be vastly different.

May 4: Grogu, there you are! Asteroid 13 Egeria is moving through the constellation Virgo this month, and today is a particularly good opportunity to try to spot its motion over just a few hours.