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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
An asteroid will come close to hitting the Earth the day before Election Day
NASA delivers first grant in 30 years to support the search for extraterrestrial intelligence
watch the skies
"My dad launched the quest to find alien intelligence. It changed astronomy."