Get a head start building your very own 1970s-style Mars orbiter by snapping up an engine built for NASA’s Viking project.
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7500 light years away from Earth, The Heart Nebula is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. The nebula is formed by plasma of ionized hydrogen and free electrons, and this open cluster of stars contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun’s mass. The cluster used to contain a microquasar that was expelled millions of years ago. [image via]
NASA satellites capture the plume of smoke rising from the Rim Fire that is currently raging in California. Yosemite National Park is threatened, as is the Hetch Hetchy Reservoir, which supplies water to the San Francisco Bay Area. See more satellite images here.
Don’t freak out just yet, but NASA says Earth is at the center of a tangled mass of potentially hazardous asteroids. Is the home to all life as we know it in danger? Not in the next 100 years, according to NASA.