Magazine | Page 86 of 282 | Astronomy.com

I often read about a sunspot on the western limb of the Sun, or a crater on the eastern limb of the Moon, etc. As there is no “up” in space, how are north, south, east, and west determined?

Track an asteroid pair

Entropy’s rainbow

One winter morning as I was driving to work, I looked to the east, and the Sun was about 20° above the horizon. A solid bright column of light came straight down from it to the horizon. What causes this, what is it called, and is this related to any archaeological finds such as the obelisks of Egypt?

Hello, Moon

Astronomy magazine has lots of references to dust clouds. What is “dust” composed of?

5 Questions with David J Eicher: Episode 9 – Abraham “Avi” Loeb

How does SETI search the sky for aliens?

Astronomy for beginners, Exoplanets, Planets, Solar System

Will we see any new constellations during a solar eclipse?

Science, Solar System

How big are the smallest spherical objects in our solar system?

An ice giant pinnacle

Cassandra smiling