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Nitram

(22,794 posts)
1. When I took a course in stars and galaxies I was amazed how astronomers developed techniques
Thu May 17, 2018, 09:53 AM
May 2018

for learning about extremely distant object by by analyzing the only evidence they could observe: electromagnetic radiation: light, X-rays, radio waves, etc. Such a great example of the power of the scientific method.

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