Astronomy
Astronomy is a broad discipline covering all facets of astrophysics. In this section you can learn about the origins of the universe, black holes and other astronomical phenomena.
88 Constellation Names (and 24 You Can Only See From the Northern Hemisphere)
Constellation Pictures
How to Find Orion's Belt in the Night Sky
Radio Telescope Image Gallery
How do I build a telescope at home?
Shooting the Stars as an Astrophotographer
10 Types of Stars Blazing and Collapsing in Our Universe
Solar Storm + Earth's Magnetic Field = Auroras Galore
What's the Brightest Star in the Sky? Depends on the Season
Why a Geomagnetic Storm Makes for Pretty Skies and Tech Scares
What Is a Harvest Moon?
Mercury Retrograde Explained: Dates, Effects, and How to Cope
Learn More / Page 8
In 1953, CalTech geochemist Clair Patterson came up with an estimate for Earth's age that still holds today.