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Muistaakohan Kauko Kauhanen tämän

 
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Joined: 02 Jan 2007
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PostPosted: 09.11.2018 10:29    Post subject: Muistaakohan Kauko Kauhanen tämän Reply with quote

Aging a flock of stars in the Wild Duck Cluster

https://m.phys.org/news/2018-11-aging-flock-stars-wild-duck.html

"As a star rotates, one side of it is moving toward the Earth and the other is moving away. The half of the star rotating toward the Earth emits light with wavelengths that look squished, making the light look bluer than it would be if the star were not moving. The half of the star rotating away from the Earth causes the wavelengths to look stretched, making its light seem redder. This squishing and stretching causes spectral lines to spread across a range of wavelengths, rather than spiking at just one."

Kävin 2000 luvun alkupuolella yhden tähtitieteen peruskurssin ja kurssin luennot piti Kauko Kauhanen.

Kysyin häneltä tuosta tähtien akselinsa ympäri pyörimisestä ja siitä näkyykö se tähden valon spektrissä.

Kauko vaikutti kysymyksen jälkeen mietteliäältä.

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