While we can measure properties of these upper layers using ground-based instruments, satellite-borne remote sensing instruments can give us a more frequent, global, and often higher spatial resolution perspective. And that is precisely what NASA’s Global-scale Observations of the Limb and Disk (GOLD) mission will deliver.
OSIRIS-REx launched on September 8, 2016. Now, a year later, it's returning to its home to get a second boost on to its destination, the asteroid Bennu. It'll test all its cameras on Earth and the Moon in the 10 days after the flyby.
Today is the 40th anniversary of the launch of Voyager 1. Four decades later, both spacecraft survive, still producing science, still working on their interstellar missions. On the occasion of the anniversary, we revisit Carl Sagan's reflections on the significance of the Voyager missions.
Ravenna, population 1,400, sits on the plains of central Nebraska, and almost on the center line of the path of totality for the upcoming Great American Eclipse. Nebraska native Shane Pekny reports on how this small town is preparing for the big event.
With the North American Total Solar Eclipse coming on August 21, people across the continent are getting eclipse mania! Astronomer Tyler Nordgren has written a detailed book on eclipses with a special focus on the August 21st event.