An artist's conception of one of the THEMIS spacecraft in orbit around Earth.
In additional to the five THEMIS spacecraft launched into space, 20 THEMIS ground stations can observe aurora from the ground.
In this image taken on Jan. 25, 2012, the Aurora Borealis steals the scene in this nighttime photograph shot from…
Craters appear well defined on icy Rhea in front of the hazy orb of the much larger moon Titan in…
Craters appear well defined on icy Rhea in front of the hazy orb of the much larger moon Titan in…
NASA Administrator Charles Bolden responds to a reporter's question during an overview briefing on NASA's fiscal year 2013 budget, Monday,…
This image is based on a Dawn FC (framing camera) image that is overlain by a color-coded height representation of…
This image combines data from four space telescopes to create a multi-wavelength view of all that remains of RCW 86,…
A new study provides a possible explanation of mysterious X-ray flares in the region of Sagittarius A*, or Sgr A*.
This all-sky image shows the spatial distribution over the whole sky of the galactic haze at 30 and 44 GHz,…
