The European Space Agency's Mars Express satellite has been able to detect ultraviolet auroras on the planet by combining remote observations with in situ measurements of electrons hitting the atmosphere, and a new study looks at 10 years of such observations.
Historic Flooding Hits Death Valley
In October 2015, a system of storms caused significant flooding in most of California's Death Valley National Park. Flash floods from the storm destroyed roads and utilities, and damaged several historical structures.
Persian Gulf Seen at Night from Space Station
Having reached the halfway mark of his latest one-year mission and overall logging a record-breaking time in space approaching 400 days, U.S. astronaut and commander of the current Expedition 45 crew Scott Kelly has been dazzling audiences with beautiful pictures taken from beyond Earth's atmosphere. He recently photographed the Nile River during a nighttime flyover on Sept. 22, 2015.
Satellite Captures Earthquake Displacement in Chile
On Sept. 16, 2015, an 8.3-magnitude earthquake struck the coast of central Chile, triggering tsunami warnings and coastal evacuations. Lasting three minutes, the powerful earthquake occurred along the boundary of the Nazca and South American tectonic plates.
Sentinel Satellite Captures Azore Islands' Beauty
This Sentinel-1A radar image features some of the Azore islands about 1,600 kilometers west of Lisbon, including the turtle-shaped Faial, the dagger-like Sao Jorge and Pico Island, with Mount Pico reaching more than 2,351 meters in height.
Hurricane Joaquin Pictured from International Space Station
Hurricane Joaquin, the strongest Atlantic hurricane of the 2015 season, is shown in this photograph taken by NASA Astronaut Scott Kelly on Oct. 2, 2015, from the International Space Station.
Liquid Water Flows on Mars
New findings from NASA's Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars.
Mississippi Swampland Seen from Space
This Sentinel-2A ˜color vision' image captures part of the Mississippi swamps on the east and west banks of the Mississippi River, south of New Orleans and north of the Mississippi Delta. The red color shows vegetation, while gray represents bodies of water.
Hubble Records Twin Jet Nebula Expansion
A new image from the NASA/ESA Hubble Space Telescope captures the Twin Jet Nebula's shells and knots of expanding gas, as two iridescent lobes of material stretch outwards from a central star system. Within these lobes, two huge jets of gas are streaming from the star system at speeds in excess of 1 million kilometers (621,400 miles) per hour.
A Great Salt Lake in the Australian Desert
This image captured by Sentinel-2A on July 13, 2015, features Lake Amadeus in Australia's Northern Territory.