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Rare illusion gives 'once-in-a-lifetime' comet a seemingly impossible 2nd tail after closest approach to Earth for 80,000 years
New photos of comet Tsuchinshan-ATLAS appear to show a faint "anti-tail" pointing away in the wrong direction. The puzzling ...
New study eases concerns over possible 'doomsday' asteroid swarm
Astronomers have good news about potentially hazardous asteroids lurking near our planet: There aren't as many as we thought.
Comet last seen in the Stone Age makes appearance over Earth
A comet that passes by Earth just once every 80,000 years has been spotted in the skies, but it may not survive for much longer.
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Comet likely last seen when Neanderthals walked Earth could soon dazzle in the night sky
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A recently ...