"The most exciting thing about Cassini was that this mission united people all around the world." Researchers say goodbye to NASA's space probe Cassini.
Tess rode a SpaceX Falcon rocket as it embarked on a quest to find new planets around neighboring stars that could support life. The washing machine-sized telescope will scan almost the entire sky for at least two years.
With the new experiment, the US space agency wants to research how human sperm cells react to microgravity — and whether humans could procreate in space. Other mammals have had little success so far.
German astronaut Alexander Gerst is returning to the ISS as commander in June. Today he is giving his last press conference before the flight. As the first-ever German ISS commander, what exactly will he have to do?
It might not be any bigger than your own refrigerator, but the TESS telescope will deliver the stuff of your wildest sci-fi fantasies: Earth-sized planets by the hundreds, and all in the next two years.
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