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Blogs I follow:
Video with 4 notes
This is something that, while possible with traditional encyclopedias, is so much easier with Wikipedia as a resource that I feel confident in saying that this would have never been created if Wikipedia hadn’t existed. It’s a little slow at first, but stick with it, it is cool.
Link
This is a neat little map of the galaxy that allows you to rapidly switch between various wavelengths. Cool idea. If you’re into astronomy at all, you’ll probably enjoy it.