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 ...

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

Like April, May opens with a Full Moon as our satellite officially reaches this phase at 1:23 P.M. EDT. The month of May also carries 2026’s first — and only — Blue Moon, with a second Full Moon ...

Venus and Jupiter are the top evening features for your observing run after sunset in May. Jupiter also hosts a handful of exciting double transits — and double shadow transits — involving Europa and ...