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Peter Erwin's user avatar
Peter Erwin's user avatar
Peter Erwin's user avatar
Peter Erwin
  • Member for 9 years
  • Last seen this week
  • Munich, Germany
6 votes
Accepted

Has earthshine in fact increased since lights (say 1900); that is to say can we measure or has there been a measurable increase? What are the numbers?

4 votes

Since John Herschel was first to make a photograph on a glass plate in 1839, why was the first astronomical photograph not taken until 1840 by Draper?

2 votes

Is phys.org/space-news reliable source?

3 votes

Which University of Oklahoma research purported to "detect thousands of extragalactic planets back in 2018"? Which instrument was used?

5 votes

how to make postage stamps of galaxies

2 votes
Accepted

Gas mass and velocity in galaxy

9 votes

Acetylene at Uranus? What's JWST's evidence and current thinking of how it's possible?

1 vote

Understanding PSF models and PFSEx output

18 votes

What telescope is Polish astronomer Kazimierz Kordylewski holding in this April 1964 photo at the Jagiellonian University Observatory in Krakow?

0 votes

What was FJM Stratton doing during Kamishari Expedition 1936, linked to Pearl Harbor intelligence?

2 votes
Accepted

How can someone take narrowband data from an OSC narrowband filter

1 vote
Accepted

What am I doing wrong in this ppxf application?

1 vote

What percentage of galaxies are isolated galaxies and what percentage are members of a cluster?

9 votes
Accepted

Did they ever figure out why Parker's WISPR cameras were able to see the surface of Venus? Mischaracterized filter, or unexpected atmospheric window?

2 votes
Accepted

2D Galaxy Spectrum taken by long-slit-spectrograph

3 votes

Why does the Milky Way look as though it's lit from one side?

13 votes
Accepted

Did this satellite streak past the Hubble Space Telescope so close that it was out of focus? If so, how close was it?

7 votes

Are there any new/latest/recent radio sky surveys' data release which is publicly accessible?

9 votes

Why does one object (star?) in this JWST image have two sets of six+plus+two diffraction spikes but another, similar object nearby have only one?

4 votes
Accepted

What causes the Balmer Jump?

6 votes
Accepted

English Meaning for Abreviations (Easy Question)

1 vote

Why can't we see the far rims of our galaxy by ordinary light?

1 vote

How do cross-matching algorithms deal with unequal-sized catalogues?

1 vote
Accepted

Earendel and HD1; identifying population 3 stars and galaxies

10 votes
Accepted

Is the Sun "chemically peculiar", and if not why is HD 222925?

3 votes

Celestial coordinates of every pixel in the image

4 votes

What object(s) are furthest above/below the galactic plane?

3 votes

How to fit LOSVD of a galaxy with gauss hermite parametrization

4 votes
Accepted

What does the celestial sphere look like in thermal IR?

8 votes

Why do stellar-mass black holes fall to the centers of their galaxies?

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