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What is a quasar?
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In the 1960s, astronomers detected radio waves coming from immense distances in space. The waves were coming from objects that, through a telescope, looked like faint stars in our own galaxy. Studying the radio waves revealed that the objects were zooming away from us at almost the speed of light. These objects, known as quasars, are the most distant objects we can see, and are hundreds of times smaller and brighter than galaxies. | | If a quasar lies behind a galaxy, we see a double image of it from Earth because gravity makes light from the quasar bend around the galaxy to reach us. |
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Previous:
Back
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Book:
1001
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Section:
Space
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Chapter:
Mysteries of Space
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