Tracking Sunspots from Mars, April 2015 (Animation)
This single frame from a sequence of six images of an animation shows sunspots as viewed by NASA's Curiosity Mars rover from April 4 to April 15, 2015. From Mars, the rover was in position to see the opposite side of the sun.
Tracking Sunspots from Mars, Summer 2015 (Animation)
This single frame from a sequence of images shows sunspots as viewed by NASA's Curiosity Mars rover from June 27 to July 8, 2015; the rover was in position to see the opposite side of the sun from the side facing Earth during this period.
Flaring, active regions of our sun are highlighted in this image combining observations from several telescopes. During the observations, microflares went off, which are smaller versions of the larger flares that also erupt from the sun's surface.
The image taken by the Oschin Schmidt Telescope, shows the star AC +79 3888, also known as Gliese 445. NASA's Voyager 1 spacecraft, which is on a trajectory out of our solar system, is headed toward an encounter with AC +79 3888 (circled in red).
This artist's concept shows the general locations of NASA's two Voyager spacecraft. Voyager 1 (top) has sailed beyond our solar bubble into interstellar space. Voyager 2 (bottom) is still exploring the outer layer of the solar bubble.
Radio telescopes cannot see Voyager 1 in visible light, but rather "see" the spacecraft signal in radio light. This image of Voyager 1's signal on Feb. 21, 2013. At the time, Voyager 1 was 11.5 billion miles (18.5 billion kilometers) away.
Transitional Regions at the Heliosphere's Outer Limits
This artist's concept shows NASA's Voyager 1 spacecraft exploring a region called the 'depletion region' or 'magnetic highway' at the outer limits of our heliosphere, the bubble the sun blows around itself.
This artist's concept shows the different expected directions of the magnetic fields in interstellar space (black lines) and the magnetic field emanating from our sun (white lines) as NASA's Voyager 1 spacecraft travels northward out of the heliosphere.
This artist's concept shows plasma flows around NASA's Voyager 1 spacecraft as it approaches interstellar space. Voyager 1's low-energy charged particle instrument detects the speed of the wind of plasma, or hot ionized gas, streaming off the sun.
This artist's concept shows how NASA's Voyager 1 spacecraft is bathed in solar wind from the southern hemisphere flowing northward. This phenomenon creates a layer of giant bubble of solar ions just inside the outer boundary of the heliosphere.
This frame from an animation shows how the magnetic field lines emanating from our sun spiral out into the solar system as the sun rotates. NASA's Voyager 1 is in an area scientists are calling the stagnation region, at the outer layer of the heliosphere.