[Q&A] Auroras in the South, Restarting Planets' Dynamos, Old People on Mars
Universe Today Podcast
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The Benefits of Telescopes for Astronomy
With a telescope, astronomers can do this kind of a thing from afar. Astronomers use trigonometry to measure the distance to objects that are far away. An astronomer can look at the chemical fingerprint of a star and they can see what chemicals are present in the outer atmosphere of that star.
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