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Evidence of ancient frozen ocean found on dwarf planet Ceres
Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.
An asteroid has a 2% chance of hitting Earth in 2032. Here’s how astronomers are tracking it
YR4 has a 2% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.