Chandra Has Been X-Raying the Universe for 15 Years

When the Chandra X-ray Observatory celebrates a launch anniversary, it goes big with exploding stars and rotating neutron stars. Today marks 15 years of precision X-ray investigations of stars, galaxies, black holes, neutron stars, and even dark energy. NASA celebrates with supernova and pulsars. » 7/24/14 1:37am Thursday 1:37am

Two Small Rocks From Space, Two Giant Lawsuits For Mankind

Forty-five years ago yesterday, on July 20, 1969, Edwin "Buzz" Aldrin and Neil Armstrong stepped into history. Shortly before 11 p.m. Eastern time, the pair emerged from their landing craft, the Eagle, and became the first men to set foot on the moon. This week, On Remand looks back at that "one giant leap for… » 7/23/14 5:56am Wednesday 5:56am

The Sun Emits a Plasma Arc So Big You Could Fit 25 Earths Beneath It

The sun is big. Really, really big. It's so big, every feature on it is mind-boggling huge. Last week it spun out a massive prominence arcing out into space so ginormous that a mischievous fireproof Titan could've used it as a hoop to dunk the Earth in a game of cosmic basketball. » 7/22/14 7:31pm Tuesday 7:31pm

New Lunar Photos Offer a Stunning 3D Flyby Of The Apollo 11 Site

Forty Years after touching down near the Sea of Tranquility, the trails of disturbed regolith created by the Apollo 11 astronauts are still clearly visible in photographs taken by the Lunar Reconnaissance Orbiter. Scientists used those and other images to create this amazing virtual model of the landing site. » 7/18/14 10:20am 7/18/14 10:20am

The Antares Rocket Launch Will Be Visible July 12 – Here's How To Watch

If you've never witnessed a rocket launch in person, you'll want to keep your eyes peeled this Saturday, when the launch of Orbital Sciences Corp.'s commercial Antares from NASA's Wallops Flight Facility will be visible from much of the East Coast. Here's what you need to know to catch a glimpse. » 7/11/14 10:30am 7/11/14 10:30am