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Could there be another planet behind the sun?

If you've read your share of sci-fi, and I know you have, you've read stories about another Earth-sized planet orbiting on the other side of the Solar System, blocked by the Sun. Could it really be there?

dateFeb 24, 2015 in Astronomy
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Building a smarter rover

The next mission to Mars could carry a smarter rover that is able to make better decisions absent instructions from Earth. Engineers are looking to automate some of the simple decision-making steps undertaken ...

dateJun 04, 2015 in Space Exploration
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