Originally launched in 1995 by the European Space Agency (ESA) and NASA to study the sun and its influence out to the edges of the solar system, the Solar and Heliospheric Observatory (SOHO) revolutionized heliophysics, providing the basis for nearly 5,000 scientific papers.
As a reminder that spring is relative depending on Earth's hemisphere, phytoplankton blooms, which were especially troublesome in the northern hemisphere's 2015 spring, have now been spotted via satellite in the southern hemisphere's spring.
Sentinel-2A, which has been in orbit since June 2105, captured this false-color image of Qingdao, China.
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.
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.
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.
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.
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, 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.
New findings from NASA's Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars.
