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Scientists say exoplanet 100 light years from Earth may be covered with deep ocean
The exoplanet orbits "a nearby visual-binary M dwarf" star
NASA: Asteroid 2.3 times the size of dinosaur heading for Earth
Asteroid 2022 PW may be small, but it will fly dangerously close to the Earth, relatively close to the Moon's distance to the planet
Russia says it will leave the International Space Station after 2024
The announcement comes as NASA and Roscosmos are laying plans to transition to other stations post-ISS