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Planet-killing astronomer who downgraded Pluto looks for a replacement
Étienne Trouvelot's 19th century astronomical drawings compared to NASA photos
Check out this rare photograph of a triplet galaxy
Secrets of a backyard astrophotographer
What was the mystery object in space that blocked the light of a star for more than six months?
Don't miss the Super Blood Moon on May 26!
An Original Theory or New Hypothesis of the Universe, from 1750
Is the Milky Way a boneyard of long-dead civilizations?
Thomas Wright's gorgeous 1750 drawings of the cosmos
Astounding high-resolution image of a sunspot resembles a sunflower
Later this month, look up to see Jupiter and Saturn appear closer together than they've been since the Middle Ages
Are asteroid impacts preventable?
Wait, "fossil galaxies" are a thing?
Asteroid samples escaping from overstuffed NASA probe Osiris-Rex that grabbed lots of Bennu rubble
NASA spacecraft touches asteroid surface to grab rubble
A video tour of the Bennu asteroid
Watch a black hole eat a star
billions and billions
Watch a young Carl Sagan's first TV documentary, "The Violent Universe" (1969)
Video of the spectacular meteor seen from 15 states this morning
The mind-boggling size of the largest known star, Stephenson 2-18