On average, from the point of view of the sun, the Earth completes one full rotation around its axis every 24 hours or 86,400 seconds, give or take a few milliseconds. A millisecond (ms) is 0.001 of a ...

Find out when the next full moon will light up the night sky. Discover its phases and mysteries with ExtremeTech’s guide.

🌹 Ava of Light has a heartfelt reading waiting just for you — your first session is only $1!

Behold! The 2025 ZWO Astronomy Photographer of the Year Awards shortlist has been released, showcasing a spectacular array of ...