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

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.

Just over 40 years ago, in his novel Contact, astronomer Carl Sagan imagined what it would be like to detect radio signals beamed from other intelligent lifeforms in the galaxy. In the story, these ...

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 ...

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 ...

The Moon rises around 10:30 P.M. local daylight time in northwestern Scorpius and passes 0.5° south of Alpha (α) Scorpii, better known as Antares, at 11 P.M. EDT. Some locations in the Southern ...

The evening sky presents quite a show this month. The bright planets Venus and Jupiter shine prominently in the northwest as the sky darkens. It’s best to look for Venus first. The brilliant planet ...

On May 1, 1949, astronomer Gerard Kuiper spotted a new moon of Neptune while examining photographic plates from McDonald Observatory’s 82-inch telescope. It would be the last moon discovered at that ...