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These Stellar Explosions Cause Massive Stars to be Born!
Amaze Lab
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4/17/2025
Astronomers have mapped only the second molecular outflow of its kind.
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Learning
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00:00
This is what's called a molecular outflow. It can occur in nebulas dense with hydrogen where stars
00:08
form sending gas and other material flying out into massive cosmic clouds and it's incredibly
00:13
rare for them to ever be mapped. In fact the first clearly documented one ever was found in 1980 in
00:18
the Orion Nebula and the second was only recently caught by the Atacama Large Millimeter Submillimeter
00:23
Array or ALMA. This is W28A2. It's what's known as a massive stellar nursery where new massive
00:29
stars form. Astronomers believed this would be a likely area to catch one of these molecular
00:34
outflows as smaller stellar explosions are always bipolar shooting off in only two directions whereas
00:39
the previous molecular outflow seen in Orion exploded in many directions. And sure enough when they
00:44
pointed ALMA that way they found an ultra dense hydrogen cloud with a massive molecular outflow
00:49
with 34 of these streamers coming directly from a single point within the cloud. What's more they
00:54
calculated the speed of the outflow to be traveling 80 miles per second and the explosion started about
00:59
a thousand years ago. These outflows are much weaker than when a star goes supernova and we don't
01:03
really know why they happen but they could be key in star formation and just like the Orion
01:07
molecular outflow there was yet again no star at the center of this stellar explosion.
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