YS5, a building-sized space rock, will safely pass Earth on July 17, prompting NASA and ISRO to emphasize the importance of planetary defense. While not hazardous, this event underscores the need for ...

Crinia is a unique 5-kilometer asteroid that shares Earth’s orbit in a rare one-to-one rhythm. Despite its nickname as Earth’s “second moon, ” it actually orbits the sun with a looping path that ...