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How do astronomers track asteroids that could threaten Earth?
Over the next several weeks, astronomers will be looking closely at an asteroid called 2024 YR4 that could be as big as a ...
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An asteroid could hit Earth in 7 years. Here's how astronomers are tracking it
Over the next several weeks, astronomers will be looking closely at an asteroid called 2024 YR4 that could be as big as a ...
Spacefarers may contaminate other worlds—but scientists have plans to keep the cosmos clean
In his inauguration speech in January, United States President Donald Trump declared the US would "plant the stars and ...