Earth & Space

As this image from the GOES-13 satellite shows, the snow that hit the Eastern Seaboard was delivered by a formidable storm. Picture after the jump.

Exotic lighter-than-air craft�including argon- and methane-filled balloons and hopping dirigibles�offer tantalizing prospects for future missions to Saturn's largest moon.

What's behind the starry flap? Follow the jump to see today's scene, the latest in a collection of space imagery compiled by Alan Taylor for the Boston Globe's photo blog, The Big Picture.

The history of NASA's wearable spacecraft will be visible in a traveling Smithsonian exhibition scheduled to make the rounds this Spring.

Astonishing caverns near the Ascraeus volcano on Mars aren't the holes left by Frank Herbert's sandworms, but they may evince past volcanic activity.

The Earth's shadow cast against the Moon evokes the space shuttle Discovery's dwindling, penumbral career.

The Pioneer anomaly, a long-discussed discrepancy between the expected and actual speeds of the Pioneer spacecraft, has tantalized researchers with the possibility of an exotic new physics. A solution may be close at hand�and even if it supports the standard model, it's pretty amazing.

For the first time since 1638, a lunar eclipse coincides with the winter solstice. Add the Ursid meteor shower, and the tonight's sky offers a triple dose of wintry glamor.

Is it the surface of an asteroid? Alzheimer's-ravaged brain tissue riddled with amyloid plaques? An electron micrograph of Limburger cheese? Answer after the jump.

Cosmologists are finding circles in the sky�specifically, in the pattern of microwave background radiation, the echo of the Big Bang. Some think they're traces of a time before time; others argue that they're the "bruises" left by collisions with universes other than our own.