This image from NASA's Mars Reconnaissance Orbiter shows one of millions of small (10s of meters in diameter) craters and…
The support structure for the antenna, also called the alidade, is being constructed.
Smoke from wildfires in Canada's Yukon and Northwest Territory can be seen from space.
The light of a new day on Saturn illuminates the planet’s wavy cloud patterns and the smooth arcs of the…
A large plume of smoke from the Alamo Fire raging just north of Santa Maria in Santa Barbara County, California,…
Graphic of NASA's Heliphysics System Observatory, or HSO, spacecraft as of July 2017.
Expedition 52 flight engineers prepare to don their Russian Sokol suits.
Expedition 52 crew members report for qualification exams.
Expedition 52 flight engineer Randy Bresnik of NASA listens to questions from the press.
Expedition 52 flight engineers pose for a photograph outside the Soyuz simulator.
