Astronomy

https://stellarium-web.org/

https://www.arvindguptatoys.com/amazing-astronomy.php

http://www.seasky.org/astronomy/astronomy-messier.html

http://www.seasky.org/astronomy/astronomy-calendar-2021.html

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Read the following interesting facts about astronomy,

Astronomy Facts: 33 Interesting Facts About Astronomy | KickassFacts.com

Has anyone ever thought about the x ray emission through galaxy clusters? My question was, what is the link between Rampressure effect and Bremsstrahlung effect in case of this x ray emission?