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Astronauts aboard the International Space Station complete their third spacewalk in eight days
For Teachers: Download these free printable activities to teach your students about space.
The Kelly twins—one in orbit and one on Earth—may help NASA unlock the secrets of long-term space travel.
A new deep space satellite will take photographs of the earth and measure solar storms
Virtual reality was on display at the 2015 Consumer Electronics Show
The International Space Station receives a shipment of groceries and Christmas gifts
The discovery of new Earthlike planets boosts the odds that alien life could exist
New findings boost the chances for life forms on the Red Planet
The Orion spacecraft successfully completes its orbit around Earth
A space probe makes history by landing on a moving comet
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