Video: Will this go faster than light?

Light speed is the ultimate speed in our universe. Why we haven't been able to build - or even conceive of - a contraption that goes faster than light.

View from space: Crescent moon and Earth’s atmosphere

Astronaut's view of crescent moon rising and the cusp of Earth's atmosphere.

Why does this brown dwarf have such strangely red skies ?

Brown dwarfs straddle the line between stars and planets. This one caught researchers' attention for its extremely red appearance. Turns out its atmosphere is laden with dust.

NASA spacecraft spots new crater on Mars

Cosmic paintball! NASA image of dramatic new impact crater on the planet Mars.

Polaris, aka the North Star, is getting brighter

Modern interpretations of the historical data indicate that Polaris could be as much as 4.6 times brighter than it appeared to some of the earliest astronomers.

Kepler discovers a wobbly planet with weird seasons

On Earth, the cycle of precession lasts 26,000 years. The planet Kepler-413b precesses, or wobbles, wildly on its spin axis, in a cycle of only 11 years.

Where the Curiosity rover is now on Mars

The Curiosity rover is in a particularly interesting place now, creeping across a sand dune in a place called Dingo Gap on Mars. Breathtaking images!

Amazing new image of Saturn’s puzzling hexagon

Saturn's hexagon is a long-lived weather pattern at the planet's north pole, first spotted by Voyager 1 in 1980.

NASA to create the coldest spot in the universe aboard the ISS

The researchers plan to study matter at 100 pico-Kelvin. At such low temperatures, ordinary concepts of solid, liquid and gas are no longer relevant.

Video: Solar eclipse from space

On Jan 30, the moon moved between NASA's Solar Dynamics Observatory (SDO) and the sun, giving the observatory a view of a partial solar eclipse only visible from space.