The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact ...
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Space agency activates its largest planetary defense drill as interstellar visitor approaches Earth
The world's largest planetary defense drill is underway as scientists prepare for 3I/ATLAs to make its closest pass by Earth ...
The 38-foot-wide space rock is projected to come to within just 123,000 miles of our planet, according to NASA.
The Geminid meteor shower put on a dazzling cosmic firework show when it peaked overnight on Dec. 13 as shards of the solar ...
The Why Files on MSN
What really happened to the planet between Mars and Jupiter
For decades, some scientists argued that our solar system showed signs of ancient catastrophe. A missing planet between Mars ...
Hot Jupiters were once cosmic oddities, but unraveling how they moved so close to their stars has remained a stubborn mystery ...
A vast ring of rocky leftovers between Mars and Jupiter, the asteroid belt preserves clues to how the planets — and Earth ...
The Geminid meteor shower peaked overnight on Dec. 13-14, with the best viewing between 10 p.m. and 4 a.m. under moonless ...
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