Astronomy and Space Blogs 

The largest but reader beware! There's an opinion for most everything.

https://www.cloudynights.com/

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Sky and Telescope's Astronomy Blogs 

https://skyandtelescope.org/astronomy-blogs/

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Rod Molise

https://uncle-rods.blogspot.com/

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The Planetary Society

https://www.planetary.org/articles

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Spaceflight News

Spaceflight Now – The leading source for online space news