As the sun rises, our Global Hawk is prepped for flight at Armstrong Flight Research Center on Edwards Air Force Base in California.
June 29 | 2017
Pre-dawn flights of our Global Hawk help beat hot summer days in Southern California. Electronic components, which are cooled by fuel onboard, only function within temperature limitations, so testing usually ceases by midday, as fuel and onboard computers become too hot to operate. The Global Hawk unmanned aircraft is used for high-altitude, long-duration Earth science missions. The ability of the Global Hawk to autonomously fly long distances, remain aloft for extended periods of time and carry large payloads brings a new capability to the science community for measuring, monitoring and observing remote locations of Earth not feasible or practical with piloted aircraft, most other robotic or remotely operated aircraft, or space satellites. Image Credit: NASA/Michael Bereda
Darker, cooler areas on the Sun – known as sunspots – have been absent for almost two weeks, as of Feb. 1.
February 06 | 2018
A single, tiny one appeared on Jan. 31, but even that is hard to see in this rotating view from our Solar Dynamics Observatory. The video shows a rotating sun in filtered light for the past week, but it is even hard to tell the sun is rotating since there are just about no features. This spotless period is a prelude to the approaching period of solar minimum next year, when the Sun’s activity will be at the low end of its 11-year cycle. Credit: NASA/SDO
Observing images of craters on Mars provides scientists insight into the water that carved them and the Red Planet's history of water activity.
February 07 | 2018
What do you think this tadpole-shaped impact crater says about the water that used to fill it? Based on the terrain-height information and knowing that water always flows downhill, scientists were able to infer that the water in the tadpole crater was flowing down, and outward. The image was taken by the High Resolution Imaging Science Experiment (HiRISE) camera on our Mars Reconnaissance Orbiter. Image credit: NASA/JPL-Caltech/Univ. of Arizona #nasa #space mars