Skip to main content

All Questions

0 votes
0 answers
57 views

Help me figure out how to solve the gravitational lens equations [migrated]

I want to simulate gravitational lensing. In the article LENSINGGW: a PYTHON package for lensing of gravitational waves there is this fragment [page 3]: My research: As far as I understand, this is a ...
ayr's user avatar
  • 2,444
7 votes
1 answer
151 views

Detect sub figures and split (automatically?)

I would like to take a large figure showing a sequence of individual plots and automatically split the into series of images showing the individual sub-plots (to be exported as animated GIF later). ...
Markus Roellig's user avatar
18 votes
2 answers
1k views

Processing images from NASA's Juno Jupiter Orbiter

Question Can you help me improve what I’ve done to create an enhanced-color picture from an image provided by NASA’s JunoCam? [My work is shown in the penultimate image of Jupiter in this post.] I’...
theorist's user avatar
  • 3,643
32 votes
1 answer
2k views

Interstellar Image Effects

I'd like to know how to create this type of gravitational lensing effect in an image (here are some star fields from the hubble) "I wrote down the equations and I tested them in Mathematica by ...
M.R.'s user avatar
  • 31.6k
5 votes
2 answers
576 views

How to find the Andromeda Galaxy

I would like to find the Andromeda Galaxy ($M31$) with the unaided eye. One way is to use the following image and graphic but I can’t find it just by looking in a dark sky. It is hard to detect ...
vito's user avatar
  • 8,988
16 votes
2 answers
1k views

Align stars in multiple images

I hope that you find this question interesting and that this will help others with similar problems as this configuration is not so particular. My problem I have multiple images of a particular ...
Dargor's user avatar
  • 1,379
20 votes
1 answer
622 views

Segmentation of sunspots

I recently went for a walk with my camera and snapped a few pictures of the sun. The pictures didn't turn out too well, but this was to be expected without a telescope. I thought it might be a nice ...
paw's user avatar
  • 5,670
53 votes
4 answers
5k views

Mollweide maps in Mathematica

Update The integration of Healpix into mathematica is now available. Context In my field of research, many people use the following package: healpix (for Hierarchical Equal Area isoLatitude ...
chris's user avatar
  • 23.1k