Astronomy for Beginners

Here’s where you’ll find observing guides, how-to articles and great astronomy hints and tips. Don’t forget to also check out our comprehensive astronomy dictionary.

Astronomy Dictionary
Muon collider

A type of particle accelerator capable of smashing particles called muons and anti-muons together to study high-energy collisions.

Arc-second

A unit of measurement in astronomy that is equivalent to 1/1800th of the angular diameter of the Full Moon.

Einstein Ring

This is a rare form of gravitational lens that occurs when a distant galaxy’s light is magnified by another galaxy directly in front of it, as seen from Earth. The result is a distorted image of a background galaxy in the shape of a perfect ring.

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