This shot, taken during Apollo 4, shows the jettisoning of the interstage section that joined the first and second stages.
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A mission designed to reboost the observatory has suffered fatal issues of its own.
The ion-powered robots would be able to access the methane-carved caves of Saturn's largest moon.
The under-$100 device shows how hackers with brief physical access to an aircraft could pose a serious cybersecurity risk.
Katalyst's Link spacecraft is tumbling in orbit, which is a troubling sign for a rescue mission.
The heat could be rising from cooling lava flows beneath a layer of solidified crust.
Photo: NASA 
