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Peter Erwin
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About

Astronomer at the Max-Planck-Institute for Extraterrestrial Physics, specializing in supermassive black holes and galaxy morphology, dynamics, and evolution.

Open-source code for fitting images of galaxies: www.mpe.mpg.de/~erwin/code/imfit

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Votes Newest
66
Where do we have it from that the Moon is migrating away from Earth?
Jul 14 '20
59
Is oxygen really the most abundant element on the surface of the Moon?
Feb 11
52
Is Earth's Surface "In orbit"?
Nov 18 '19
43
Are there any old/ancient star maps that we can compare to today’s and see drastic differences?
Aug 11
42
Are there observable changes in a star about to become supernova, minutes or hours before the explosion?
Sep 21 '16
25
Is it possible that the Sun and all the nearby stars formed from the same nebula?
Feb 11
18
Which are stars and which are noise in this comet photo?
Oct 15 '19
15
Why is Starlink polluting the night sky a big concern if we have space telescopes?
Apr 21
14
How can the (in my eyes quite ridiculous) conjecture of Sheldrake be disproven?
Jun 4
14
Why isn't most hydrogen in the universe molecular (diatomic), instead of atomic (monoatomic)?
Apr 8
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83
Why don't solar panels contribute to global warming?
46
Were there occasions when a sovereign country voluntarily joined another country?
26
Can a planet's axial tilt turn to always be facing its star?
16
Why did native Americans and Europeans mix in South America but not in North America?
14
What is the longest retreat?

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