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View Full Version : Amazing New Views of Betelgeuse Courtesy of ALMA



Fraser
2017-Jun-27, 03:00 PM
An angry monster lurks in the shoulder of the Hunter. We're talking about the Red Giant star Betelgeuse, Alpha Orionis in the constellation Orion. Recently, the Atacama Large Millimeter Array (ALMA) gave us an amazing view of Betelgeuse, one of the very few stars resolved as anything more than a point of light.
The post Amazing New Views of Betelgeuse Courtesy of ALMA (https://www.universetoday.com/136220/amazing-new-views-betelgeuse-courtesy-alma/) appeared first on Universe Today (https://www.universetoday.com).


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BigDon
2017-Jun-27, 07:07 PM
Wow!

At 6 AU across it takes Betelgeuse *eight years* to rotate!

Okay, that's a take away point!

(Edit to Add: That is, a point to take with you after reading the article, not a flaw, jeez peeps.)

bknight
2017-Jun-28, 12:05 PM
Since I'm not a physicist or astronomer, how is the age presumed to be 8 my?

Hornblower
2017-Jun-29, 02:54 AM
Since I'm not a physicist or astronomer, how is the age presumed to be 8 my?

If I understand correctly, the astrophysicists see telltale features in the spectrum that indicate how much it has evolved since forming from the primordial gas clouds.

schlaugh
2017-Jun-29, 03:13 AM
Also the stellar mass plays a large role in determining age, plus other factors.

https://en.wikipedia.org/wiki/Stellar_age_estimation?wprov=sfsi1


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