Space.com

What's Hot This Week Say It Ain't So, Spock! Leonard Nimoy Retires from 'Star Trek' Conventions by Denise Chow, SPACE.com Staff Writer After a long and prosperous career, Leonard Nimoy, the actor who famously portrayed the alien Mr. Spock in the original "Star Trek" television show, has attended his last convention for fans of the iconic science fiction franchise, according to media reports. Astronomers Debate Where 1st Interstellar Starship Should Visit by Clara Moskowitz, SPACE.com Senior Writer If humans ever build an interstellar spaceship -a vehicle capable of reaching another star - one of the biggest questions will be which of the billions of stars in the Milky Way should it visit? Sponsored by: Explosive Studies of Universe's Expansion Win Nobel Prize in Physics To Deflect Killer Asteroids, Humanity Must Work Together Secret Mission of Air Force's X-37B Robot Space Plane May Go Into Overtime Oldest Mars Meteorite Hints at Red Planet's Warm, Wet Past 7 Surprising Facts About the Universe