Cosmic Queries: Telescopes
StarTalk Radio
00:00
Observing a Telescope on Earth
There's a limit to how big you can make a telescope on Earth because it's subject to gravity. The largest radio telescope in the world is so large you could not hold it up and steer it. You have to wait for stuff to drift into its field of view just to observe it. In space, there are no such things as unsterable materials like glass or wire mesh.
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