NASA has reached major milestones in asteroid exploration. Here are five highlights.

That asteroid explosion over Tunguska was 1,000 times stronger than the nuclear bombing of Hiroshima.

On June 30, 1908, an asteroid tore across the sky above a remote part of Siberia before erupting in a cataclysmic explosion.

"People will be hurt and killed" if we're not vigilant, scientists warn.

This year’s Asteroid Day has planned events worldwide and online. It acts as a reminder about advances in planetary defense.

Every June 30th, Asteroid Day marks the anniversary of the 1908 Tunguska impact and turns global attention to the science of ...

Forbes contributors publish independent expert analyses and insights. I cover the history of science and exploration. On June 30, 1908, an asteroid about 65 meters wide collided with Earth’s ...

For decades, astronomers and policymakers have been working on plans to protect our planet from killer asteroids. But now there's a new realm to protect: the thousands of satellites we're putting in ...

Asteroid Day was launched in 2015 and officially recognized by the United Nations in 2016. It serves to educate the public about the risks and opportunities presented by asteroids through ...

Former NASA astronaut and current US Senator Mark Kelly (D-AZ) is spearheading a campaign to designate June 30 as Asteroid Day. The "holiday," which is already acknowledged in other parts of the world ...