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Crash Course
White Dwarfs & Planetary Nebulae
Today Phil follows up last week’s look at the death of low mass stars with what comes next: a white dwarf. White dwarfs are incredibly hot and dense objects roughly the size of Earth. They also can form planetary nebulae: huge,...
Curated Video
What Are Stars?
What are stars made of? How are they born, how do they live, and how do they die? Physics - Our Solar System - Learning Points. Our nearest star is the Sun. A star is formed from a cloud of dust and gas, which shrinks under gravity and...
NASA
Hubble's Field Guide to Nebulae
Nebulae are some of the most resplendent objects in the universe, but it’s easy to confuse which one is an “emission nebula,” and which one is an “absorption nebula.”
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Thankfully, this “Field Guide”...
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Thankfully, this “Field Guide”...
Getty Images
Planetary nebulae are shells of glowing gases from a dying star, expanding outwards from the central star
Planetary nebulae are shells of glowing gases from a dying star, expanding outwards from the central star
Crash Course
Crash Course Astronomy #30 White Dwarfs & Planetary Nebulae
White dwarfs are incredibly hot and dense objects roughly the size of Earth. They also can form planetary nebulae: huge, intricately detailed objects created when the wind blown from the dying stars is lit up by the central white dwarf....