Comments and questions about the APOD
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- 4725 Å
- Posts: 9815
- Joined: Sat May 29, 2010 5:33 am
What David Malin meant, I think, is that the dust particles themselves get a lot smaller when they are hit by hard ultraviolet radiation and strong winds from hot massive stars.
Take a look at the dust grain at right. It looks large and fluffy, doesn't it? I guess hard radiation and strong winds could break it up.
- Abominable Snowman
- Posts: 14561
- Joined: Wed Jan 31, 2007 11:13 pm
- Location: Guffey, Colorado, USA
Boomer12k wrote: ↑
Thu Oct 03, 2019 2:09 am
The "Reindeer Rat-thingy" nebula...
I think a better term is "Dispersed" rather than evaporating...I don't thing dust becomes a vapor, doesn't it just "move off"?
While "evaporate" certainly has the meaning of a state change between liquid and gas, that is far from its only meaning.