SpaceX lifted off on a planned hour-long test flight — the last mission for the troubled V2 prototype that has failed several times this year.
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'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than 'Planet Nine'
A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...
It will be several years before any of these new commercial space stations circle the Earth at around 17,500 miles per hour ...
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