Yes, a killer asteroid could hit Earth Asteroid smackdown. Earth is in a constant game of celestial bumper cars, colliding with—and obliterating—the relatively puny space rocks that dare cross its path. The planet is still standing after 4.6 billion years, but a modern collision could devastate cities, continents, and even life itself. (Just ask the dinosaurs.) NASA’s Center for Near-Earth Object Studies keeps watch on more than 18,000 potential troublemakers, ranging from just 3 feet to more than 3,000 feet across. Meteorites smaller than 100 feet usually explode in midair, like one did over Chelyabinsk, Russia, in 2013. There wasn’t enough shrapnel to leave a crater, but the sonic boom did blast out windows. So how much havoc could larger rocks wreak? Diameter 3,300 ft. Lights out: This debris could throw enough dust to block out the sun—globally. Impact energy 0.01 MT Chelyabinsk: ...
NASA's InSight spacecraft landed on Mars Monday afternoon, finishing one journey - through space - and now launching on another: to go deeper into Mars. The mechanical three-legged, one-armed mining spacecraft landed as planned just before 3 p.m. ET. InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) will be the first mission to drill into the deep interior of Mars as well as investigate if there are "Marsquakes." NASA's latest spacecraft is settling into life on Mars by catching some rays, recharging its batteries and taking stunning photos. InSight, the robotic mining device that will eventually dig into the surface of the red planet, opened its solar panels on schedule Monday night, about five hours after a "flawless" landing, NASA officials said in a press release.