NASA’s Lucy mission is about to fly past asteroid Donaldjohanson, a strange, elongated rock in the main belt. While this ...

Three Tucson scientists are featured in "Planetary Defenders," a new NASA documentary that premieres Wednesday about the ...

EB5 impacted Earth was discovered by Krisztián Sárneczky using the 0.60-m Schmidt telescope at Konkoly Observatory in Hungary. Credit: Space.com | footage: Krisztián Sárneczky / orbit animation: NASA/ ...

NASA has defined asteroids as small, rocky objects that orbit the sun like planets, but they are much smaller in size. Most ...