Arecibo Legacy: New Data on Near-Earth Asteroids
The largest set of radar data for near-Earth asteroids will help us understand their origins and protect Earth from future impacts.
Where Did Earth’s Trojans Go? Ask the Moon
Why doesn't Earth have Trojan asteroids of its own? Large impacts in the early years of the solar system may be to blame.
Stargazer's Corner: Adventures Under the Night Sky
Amateur Astronomers Team Up to Measure Distance to a Close-passing Asteroid
A small group of amateurs teamed up to measure the parallax, and thus the distance, to a near-Earth asteroid as it passed by our planet.
Watch an Asteroid Race Across the Sky
The kilometer-wide, potentially hazardous asteroid 1994 PC1 will fly past Earth on January 18th. Good news on two counts: It won't hit us, and it's bright enough to see in a 4-inch telescope.
How Often Do Chicxulub-level Asteroids Hit Earth?
Asteroids of different sizes crashing on Earth originated from different parts of the main asteroid belt, researchers say; the finding has implications for how often such collisions happen.
Karma Asteroid Family Might Be Sending Members Near Earth
New simulations have identified the Karma family of asteroids in the main belt as a potential source of near-Earth asteroids.
Second Earth Trojan Asteroid Discovered
A recently discovered asteroid appears to be an Earth Trojan, orbiting a gravitationally stable area with only one other known occupant.