It involves a bright planet passing by a large and diffuse star cluster visible with the naked eye. On the evening of June 13, 2023, I went out as twilight faded to observe the conjunction of ...

Another year of skywatching is upon us, and there's a lot to look forward to in 2025!

Globular clusters like this one, Omega Centauri, are very dense groupings of up to a million stars ... [+] in a sphere, with a radius from a dozen to a hundred light years. It’s almost globular ...

On Jan. 9, skywatchers can watch the dark limb of the 82%-illuminated waxing gibbous moon creep across this beloved star ...

The closest star system to the Sun is the Alpha Centauri system. Viewed face-on, grand spiral galaxy NGC 5643 has a festive appearance in this colorful cosmic portrait. This rare structure is known as ...