The Opportunity rover looks back after escaping a sandtrap on Mars.

Adventures on the Martian Trail

Highlights from a rover’s 14-year trek.

At Pennsylvania’s NASTAR Center, trainees climb the stairs to ride the only centrifuge in the country that simulates suborbital spaceflight and is available for private use.

Got a Ticket to Space? You’ll Have to Train First

‘We will now determine your G-force threshold…’

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