00:02this is what's called a molecular outflow it can occur in nebulas dense with hydrogen where stars
00:08form sending gas and other material flying out into massive cosmic clouds and it's incredibly
00:13rare for them to ever be mapped in fact the first clearly documented one ever was found in 1980 in
00:18the orion nebula and the second was only recently caught by the atacama large millimeter submillimeter
00:23array or alma this is w28a2 it's what's known as a massive stellar nursery where new massive
00:29stars form astronomers believed this would be a likely area to catch one of these molecular
00:34outflows as smaller stellar explosions are always bipolar shooting off in only two directions whereas
00:39the previous molecular outflow seen in orion exploded in many directions and sure enough when they pointed
00:44alma that way they found an ultra dense hydrogen cloud with a massive molecular outflow with 34 of
00:50these streamers coming directly from a single point within the cloud what's more they calculated the
00:54speed of the outflow to be traveling 80 miles per second and the explosion started about a thousand
00:59years ago these outflows are much weaker than when a star goes supernova and we don't really know
01:03why they happen but they could be key in star formation and just like the orion molecular
01:08outflow there was yet again no star at the center of this stellar explosion
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