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Sky Caramba

Crescent Venus

5 Jan 2014, 00:00 UTC
Crescent Venus
(200 words excerpt, click title or image to see full post)

It took about two millennia for people all around the world to accept the idea that the earth and other planets go around the sun instead of all the other objects going around the earth. This month, you can see what Galileo saw which helped convince scientists the old model was wrong. Continue reading →

¡SkyCaramba! Weekly astronomy blog for the week ending January 11, 2014
It took about two millennia for people all around the world to accept the idea that the earth and other planets go around the sun instead of all the other objects going around the earth. The heliocentric (sun-centered) model was so controversial in some places, offering it as true got some people in trouble. But some evidence for it has been visible to earthbound humans all along.
In ancient Greece, lived an astronomer and mathematician named Aristarchus. He’s famous for his attempts to measure the angles and apparent sizes of the moon and sun. Aristarchus tried to calculate their sizes and distances. His results were way off because the best observing equipment of his time didn’t provide measurements accurate enough for the task. But he was right about the principles he used. Modern equipment ...

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