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What is a nebula?
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A nebula is a cloud of dust and gas in space. Some of the clouds block the light from the stars behind them. These are called dark nebulae. One of the best-known is the Horsehead Nebula. Other dust clouds reflect the light from the stars and shine brightly. These are called bright nebulae. | | Stars and shining clouds of gas and dust fill the night sky. Those shown here are within the constellation of Orion. |
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Previous:
Back
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Book:
Best Ever Q&A
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Section:
Space
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Chapter:
Mysterious Universe
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