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Are you up for a challenge? How about a Grand Challenge? NASA on Tuesday issued a Grand Challenge aimed at locating all asteroid threats to Earth and figuring out what to do about them.

It seems the asteroid threat has really picked up steam lately. We've had some close fly-bys. Some scientists have suggested nuking asteroids if they get too near. NASA has an initiative to lasso an asteroid for closer study. It's been asteroid fever around the planet lately.… Read more

Here on planet Earth we're used to flames -- whether from a candle or campfire -- reaching upward to the sky with slender limbs hungry for oxygen and driven by rising hot air. But in space, sans our planet's strong gravitational pull, flames are more likely to take the shape of eerie fireballs.

Within the flame of a regular candle wick, there's quite a bit going on. As the video below released this week by NASA explains, molecules from the wick are being cracked apart and vaporized by the flame, then combined with oxygen to produce light, heat, carbon dioxide, and water, as well as soot.

In recent years we've become quite familiar with how flames can extend and expand quickly in their greedy quest for more fuel and oxygen; witness countless western wildfires of the past decade. But researchers aboard the International Space Station have observed that flames in microgravity behave much differently, staying in a small spherical shape and letting oxygen molecules come to them.… Read more

Here's another accomplishment that NASA's Mars Science Laboratory Curiosity Rover can add to its resume: the Mars-trotting robot will soon become an official Lego model.

Lego recently announced Curiosity's new gig after wrapping up its formal review process of creations that passed 10,000 votes on Lego's Kickstarter-esque Web site Cuusoo. Ironically, mechanical engineer Stephen Pakbaz, who worked on Curiosity for NASA's Jet Propulsion Laboratory, created the design for the 1:20 scale Lego version of the rover. … Read more

Supermoons can tend to get doomsdayers revved up.

Besides being a remarkable sight to behold, the massive moon also comes with the mythical stigma of causing a handful of natural disasters, including earthquakes and tsunamis, floods, typhoons, and cyclones.

And, this year's supermoon is quickly upon us. It will be shining its light next weekend on June 23. On that day, the moon will appear bigger and brighter, and be closer to Earth than it's been all year -- a total of 221,824 miles away, which is roughly 30,000 miles closer than when it's at … Read more

Walks by the river can clear your head, open your eyes, and soothe your inner flow.

It's possible that you even espy unusual things along the banks -- peculiar voles, moles, or holes that conjure stories in your head.

Phil Green was wandering along the Merrimack River in Massachusetts when he discovered a piece of rock that didn't seem like it was from around his parts.

He told CBS Boston: "There she was just sitting there, sticking up like that, and I said heck what is this. It just didn't belong."

Yes, greenish rocks tend … Read more

Despite Earthlings depending on the sun for survival, there's a lot that scientists still don't know about our solar system's star. NASA is looking to change this.

The U.S. space agency is launching a solar satellite called the Interface Region Imaging Spectrograph (IRIS) on June 26 to get a closer look at the sun's lower atmosphere. This part of the atmosphere is important because it is where most of the sun's ultraviolet emissions are generated, which are known to impact Earth's climate and the near-Earth space environment, according to NASA.

"IRIS data … Read more

An asteroid the size of a small town, and its smaller satellite "moon," are zooming past Earth this week, and you can watch on Friday afternoon as binary asteroid "1998 QE2" reaches its closet point to Earth for the next 200 years.

The 1.7-mile-long asteroid and its smaller satellite, which was just discovered this week, will come closest to Earth around 2 p.m. PT, but will still safely stay about 15 lunar distances away from us.… Read more

Future manned missions to Mars and other remote targets will require internal shielding and advanced propulsion systems to shorten transit times, minimizing exposure to cancer-causing radiation from the sun and deep space, scientists said Thursday.

Data collected by the Radiation Assessment Detector, or RAD, instrument during the Curiosity Mars rover's cruise to the Red Planet last year generally confirmed the results from earlier studies showing space radiation is a major problem that must be overcome before manned trips into deep space are attempted.

"NASA's very excited to get this new cruise data to help us refine and … Read more

The huge asteroid -- 1.7 miles long, to be exact -- that is zipping by Earth this week isn't alone.

No, it isn't carrying an alien virus or a golden DVD containing the second season of "Firefly," but it does have a traveling companion. NASA radar images just released show a previously undiscovered moon orbiting the asteroid known as "QE2," technically making it a binary asteroid system.

The smaller asteroid circling its larger celestial road trip buddy is estimated to be about 2,000 feet wide.… Read more