Planets, Astronomy | featured news

Astronomers have obtained an important first look at the dwarf planet Makemake - finding it has no atmosphere. One of five such dwarfs in our Solar System including former planet Pluto, Makemake had until now eluded study. But in April 2011, it passed between the Earth and a distant star, and astronomers used seven telescopes to study how the star's light was changed.

Curiosity is living up to its name. The NASA rover currently wheeling itself around Mars has apparently sent back some very interesting data from the Red Planet in the form of a soil sample that shows ... well, something. From the sounds of it, something big. But for now at least, that's all anyone is willing to say.

There’s an orphan planet roaming our galactic neighborhood. It’s a globe of gas about the size of Jupiter, astronomers say. And it’s out there by its lonesome, untethered to any star, drifting about 100 light-years from Earth. (In astronomical terms, that’s close.)

NASA's Curiosity rover reports confirmation that Mars has lost at least half of its early atmosphere.

Wow, what a view of the Curiosity rover! This is a self-portrait mosaic made from brand new images taken by the MAHLI (Mars Hand Lens Imager), the high-resolution camera located on the turret at the end of MSL’s robotic arm. The arm was moved for each of the 55 images in this mosaic, so the arm doesn’t show up in the mosaic. This montage was put together by Stuart Atkinson, and he notes that these images are just the low-res thumbnail images that have just been sent to Earth. “Imagine what the hi-res version will look like!!” Stu said.

Scientists have spent years hunting for Earth-like planets orbiting stars elsewhere in the galaxy. Now they have found one that's a relative stone's-throw away. The so-called exoplanet — a planet beyond our solar system — is circling Alpha Centauri B, just 4.37 light-years from Earth. A mere 3.7 million miles from the star's surface, it is far too hot to support life. But there's a chance that another planetary sibling may reside in the system's so-called habitable zone, where liquid water could exist, scientists say.

Ooh, shiny! NASA's Curiosity rover has spotted something curious on the Martian soil, likely "a shred of plastic" from the rover, says the space agency. Still, NASA is taking a hard look at the mystery object.

The NASA rover Curiosity has beamed back pictures of bedrock that suggest a fast-moving stream, possibly waist-deep, once flowed on Mars -- a find that the mission's chief scientist called exciting.

NASA's Curiosity rover reached out and touched a Martian rock with its huge robotic arm for the first time, then took off on its longest Red Planet drive to date. Curiosity spent the past several days investigating a strange pyramid-shaped stone named "Jake Matijevic," testing out some of the gear at the end of its 7-foot-long (2.1-meter-long) arm. These tools include the Alpha Particle X-Ray Spectrometer, or APXS, which measures elemental composition; and the Mars Hand Lens Imager close-up camera, or MAHLI.

Getting a six-wheeled car-size rover safely onto the surface of the red planet? Daunting, sure. But NASA did it with Curiosity. Sending humans on a mission to Mars? That requires overcoming even more outlandish obstacles.