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See A Solar Sail In The Night Sky - NASA Explains How
Space.com
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11/01/2025
NASA's Advanced Composite Solar Sail System (ACS3) will be visible from the ground. Find out when you can see it on the NASA app on a mobile device.
Credit: NASA/JPL-Caltech
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Tech
Transcript
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00:00
A NASA solar sail that you can spot from the ground?
00:04
There's a new opportunity to observe a bright NASA spacecraft
00:08
sailing across the night sky.
00:10
NASA's Advanced Composite Solar Sail System, or ACS-3,
00:14
is a small satellite that's testing new technologies in low-Earth orbit.
00:18
It recently deployed its 30-foot-wide solar sails.
00:22
These are a means of propulsion that could allow small spacecraft
00:25
to sail on sunlight.
00:27
The ACS-3 solar sails are highly reflective
00:30
and make the spacecraft appear nearly as bright as Sirius,
00:34
the brightest star in the sky.
00:36
You can find out when the solar sail spacecraft will pass over your location
00:40
using the NASA app on your mobile device.
00:43
Stay up to date on NASA's missions exploring the solar system and beyond
00:47
at science.nasa.gov.
00:50
I'm Preston Dyches from NASA's Jet Propulsion Laboratory,
00:53
and that's What's Up for this month.
00:55
NASA Jet Propulsion Laboratory, California Institute of Technology
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