Can a Spacecraft Survive Without Power in Space?

In space, losing power is a huge problem for a spacecraft. Without power, the systems controlling navigation, communication, and even life support (if it's a crewed mission) can shut down. Some spacecraft have backup batteries, but those only last so long. If solar panels get damaged or blocked, there's no way to recharge, and the spacecraft could drift aimlessly. It’s not all doom, though—clever engineers design fail-safes, like systems that reboot or reroute power in emergencies. But still, power loss in space is a bit like a car running out of gas in the middle of nowhere—except you can’t call for a tow truck! Credit:
Upgrading Hubble: By NASA - http://hubble.nasa.gov/multimedia/hubble.php, https://commons.wikimedia.org/w/index.php?curid=942493
Working inside Hubble: By NASA - http://spaceflight.nasa.gov/gallery/images/shuttle/sts-125/html/s125e008656.html, https://commons.wikimedia.org/w/index.php?curid=6824624
STS-103 Hubble EVA: By NASA - http://spaceflight.nasa.gov/gallery/images/shuttle/sts-103/html/sts103_713_048.html, https://commons.wikimedia.org/w/index.php?curid=3738258
STS-31 Launch: By NASA/photographer unknown, https://commons.wikimedia.org/w/index.php?curid=6449041
Atlantis undock ISS: By NASA, https://commons.wikimedia.org/w/index.php?curid=11146175
Dream Chaser: By Ken Ulbrich/NASA - http://mediaarchive.ksc.nasa.gov/detail.cfm?mediaid=66311, https://commons.wikimedia.org/w/index.php?curid=27705564
Space Shuttle: By NASA, https://www.nasa.gov/space-shuttle/
Mir Space Station: By NASA - https://archive.org/details/STS089-340-035, https://commons.wikimedia.org/w/index.php?curid=18427023
Record Voyager 1: By NASA - http://images.ksc.nasa.gov/photos/1977/captions/KSC-77P-0196.html, https://commons.wikimedia.org/w/index.php?curid=4285811
The Sounds of Earth: By NASA - https://web.archive.org/web/20110912123742/http://grin.hq.nasa.gov/ABSTRACTS/GPN-2000-001976.html, https://commons.wikimedia.org/w/index.php?curid=6455682
Voyager Goes Interstellar: By NASA / JPL-Caltech - http://photojournal.jpl.nasa.gov/catalog/PIA17046, https://commons.wikimedia.org/w/index.php?curid=28366203
Voyager spacecraft model: By NASA, https://commons.wikimedia.org/w/index.php?curid=66602695
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