NASA

Scientists using images from NASA's Mars Reconnaissance Orbiter have estimated that the planet is bombarded by more than 200 small asteroids or bits of comets per year.

Scientists have used data from NASA's Cassini spacecraft to map the highs and lows of Titan, Saturn's largest moon.

NASA will host a news teleconference at 4 p.m. EDT, today, May 15, to discuss the status of the agency's Kepler Space Telescope.

Scientists using images from NASA's Mars Reconnaissance Orbiter (MRO) have estimated that the planet is bombarded by more than 200 small asteroids or bits of comets per year forming craters at least 12.8 feet (3.9 meters) across.

America's first space station was launched forty years ago. Astronauts on Skylab conducted some the first comprehensive visual studies of Earth’s surface.

Acquired May 13, 2013, this image shows Mahasen over the Bay of Bengal, headed for land.

High in the Andes Mountains in Argentina, this salt lake hosts microbes that give the lakes distinct colors.

New insights into two factors that are creating a potentially volatile Southern California wildfire season come from an ongoing project using NASA and Indian satellite data.

Acquired May 5, 2013, this image shows parallel dust plumes blowing off the coast of Namibia.

An ongoing phytoplankton bloom has painted the sea surface in jewel tones.

Rising and falling seas and ancient rivers formed a bay lined with the whitest sands in the world.

The last decade has been rough for the reservoir at the heart of the intricate water storage system that sustains the American Southwest.

Acquired April 30, 2013, and April 30, 2007, these images compare conditions along the Grand River near Grand Rapids, Michigan.

International and U.S. media accreditation is open for the launch of NASA's Mars Atmosphere and Volatile Evolution (MAVEN) mission.

As wildfires wind down, teams of scientists hit the field to assess the damage. In many cases, they have help from satellites.

A field campaign called the Iowa Flood Studies (IFloodS) is taking place in eastern Iowa from May 1 to June 15, 2013. The goal is to evaluate how well rainfall data from the upcoming Global Precipitation Measurement (GPM) mission can be used for flood forecasting. GPM is scheduled for launch in early 2014.

Acquired May 2 and April 27, 2013, these images document a dramatic change in Colorado thanks to a late-spring snowstorm.

The team operating NASA's Curiosity Mars rover has selected a second target rock for drilling and sampling.