Space

In a few days, sky watchers in Eastern Europe, Asia, and Australia will get a chance to see one big rock hurtling through the heavens. One very big rock. Compared with other asteroids traveling through space, this one may seem a relative pebble -- at half the size of a football field -- but for Earth, it will make for a relatively close call.

"This is a record-setting close approach," says Don Yeomans of NASA's Near Earth Object Program at JPL. "Since regular sky surveys began in the 1990s, we've never seen an object this big get so close to Earth." … Read more

Want to feel like you contributed to something important today? Take a moment to help rename two of Pluto's moons, which desperately need a little more pizzazz as they currently float around with the drab designations P4 and P5.

With assistance from the Hubble Space Telescope, astronomer Mark Showalter discovered P4 and P5 in 2011 and 2012, respectively. In conjunction with the SETI Institute, Showalter today opened a Web site that allows anyone to vote from 12 Greek and Roman mythology-inspired names for the roughly 20-mile diameter moons.… Read more

A United Launch Alliance Atlas 5 rocket blasted off from California and safely boosted a new Earth-watching Landsat into a polar orbit today to kick off an $855 million mission. It's the latest chapter in a 40-year program to monitor the planet's resources, land use, and environmental changes.

The Landsat Data Continuity Mission, or LDCM, got underway at 10:02 a.m. PT when the Atlas 5's Russian-designed RD-180 first-stage engine thundered to life and throttled up to full power with a rush of brilliant exhaust.

The towering 192-foot-tall rocket, generating some 860,000 pounds of thrust, … Read more

Beloved astrophysicist Neil deGrasse Tyson is no stranger to the world of comic book superheroes, having already found the location for Superman's home planet. He has now turned his keen scientific mind to the Marvel world and the issue of just how much Thor's mighty hammer weighs.

Thor's hammer Mjölnir is said to be made of neutron-star matter. Tyson did the calculations and determined the hammer must therefore weigh as much as 300 billion elephants. That's not a common form of weight measurement, so we have to do some further calculations to translate elephants into pounds.… Read more

NASA's Curiosity rover currently roaming the surface of Mars is developing a bit of a reputation for discovering groundbreaking false alarms.

There have been been unverified hints of organic matter; mysterious methane that turned out to be some stowaway molecules from Earth; and strange shiny objects of unknown origin.

Yet none of these have led us to the Martians' secret underground base. So it is with some hesitation that I present the above photo from Curiosity that seems to show an even larger and shinier chunk of something metallic. The image was taken by Curiosity's Mastcam late last … Read more

Astronauts in the International Space Station have already explained how to clip fingernails and play guitar while orbiting 240 miles above the Earth. But what about all those other questions people may have about life in space?

They can be answered in an upcoming Google+ Hangout with three of the astronauts aboard the ISS -- Kevin Ford, Tom Marshburn, and Chris Hadfield.

NASA announced today that it is hosting its first live Google+ Hangout from space. It's to happen from 11 a.m. to 12 p.m. EST on February 22. The space agency is accepting questions in advance … Read more

"Star Wars" fans don't like taking "no" for an answer. The White House may have denied a petition to build a Death Star, but that hasn't stopped Dark Side wannabes from taking matters into their own hands. There's now a Kickstarter project gathering funds to build an open-source Death Star.

The project has a modest initial goal of just $30 million. That will fund initial plans and the massive amount of chicken wire needed to protect the reactor exhaust ports. The first stretch goal is where things get more serious. If the project raises $850,000,000,000,000,000, then work will begin on the actual construction. OK, that's a mighty big "if," but a geek can dream, right?… Read more

The wheels of bureaucracy do not turn at a supersonic rate.

It's been nearly four months since Felix Baumgartner traveled many, many miles into the sky in order to come hurtling back down to Earth in a freefall faster than the speed of sound. Judging by the data released by his backers at Red Bull Stratos, his jump was a breathtaking success. It was certainly thrilling to watch.

But it's not yet a world record (or as Baumgartner's group expects, several world records). For that, we're all still waiting for validation of the data by the Federation Aeronautique Internationale, the nonprofit, nongovernmental organization that regulates air sporting events and certifies record claims for aviation and aerospace achievements.… Read more

An asteroid big enough to level a major metropolitan area (probably several of them, actually) will definitely not be doing any such thing this month, but it will come pretty darn close.

First spotted by a Spanish observatory last year, small asteroid 2012 DA14 (in this case "small" means about 150 feet in diameter, or roughly the size of a supermarket) will pass within 3.5 Earth radii of the surface of our planet on February 15.

That means that this big, menacing, but ultimately harmless space rock will actually be closer to us than our many satellites in geosynchronous orbit about 22,000 miles above the equator.… Read more