As the name implies, this reflection nebula associated with the star Rigel looks suspiciously like a fairytale crone. Formally known as IC 2118 in the constellation Orion, the Witch Head Nebula glows primarily by light reflected from the star. The color of this very blue nebula is caused not only by blue color of its star, but also because the dust grains reflect blue light more efficiently than red. A similar physical process causes Earth’s daytime sky to appear blue. – NASA/STScI Digitized Sky Survey/Noel Carboni

CRASH COURSE

CRASH COURSE

Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?"

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STARGAZING BASICS

STARGAZING BASICS

In just 17 minutes, this three video series walks the newcomer to astronomy through the concepts of learning the night sky to more easily find and identify stars and constellations.

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TELESCOPE BASICS

TELESCOPE BASICS

A series of videos that provides an overview of what beginners to amateur astronomy need to know in order to better understand telescopes and telescope equipment.

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Related channels: ASTRONOMY, ASTROPHOTOGRAPHYRADIO ASTRONOMY, STARS, THE MOON, THE SUN, THE SOLAR SYSTEMCOSMOLOGY