Asteroid 2024 YR may not hit Earth in 2032, but it—and others—will keep coming back
In late 2024, astronomers spotted asteroid 2024 YR4 on a trajectory that could potentially threaten Earth. This observation ...
Dodging Doomsday: NASA’s $1.4 billion telescope will hunt city-killing asteroids, prevent ...
Surveyor, a $1.4-billion infrared telescope designed to detect asteroids and comets that could pose a threat to Earth.
Earth 1, asteroids 0: The next generation of planetary defense takes shape at JPL
The NEO Surveyor fulfills a 2005 act of Congress ordering NASA to catalog 90% of near-Earth objects larger than 459 feet, ...
earth6 天
What meteorites tell us about their birthplace in space
For years, scientists have puzzled over one big question: where do meteorites come from? These rocky visitors crash into Earth from space, but tracing their paths back to specific locations in the ...
Knowridge6 天
Mapping the asteroid belt: Where do meteorites come from?
Meteorites with less iron—called L and LL chondrites—mostly come from the inner asteroid belt. LL chondrites are connected to the Flora family, and scientists now believe L chondrites come ...
Los Angeles Times4 天
Earth 1, asteroids 0: The next generation of planetary defense takes shape at JPL
There is a nonzero chance that somewhere in the nearby solar system is a rock that might kill us all. This stony assassin may well be orbiting the sun at this very moment, careening down a ...
Scientific American3 天
A Near-Miss with a City-Killer Asteroid Highlights Gaps in Earth’s Defenses
In mid-February 2025 astronomers announced that 2024 YR4—a recently discovered asteroid big enough to severely damage or even destroy a city—stood a 3.1 percent chance of hitting Earth in 2032.