MESAHub/mesa

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Modules for Experiments in Stellar Astrophysics

Stars: 249
Forks: 82
Open beginner issues: 0
Indexed issues: 114
Avg merge: 1d 3h
Merged PRs (30d): 3

Dominant language: Fortran
License: LGPL-3.0
Last GitHub push: Sep 4, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

114 issues indexed so far

Omega glitch after remeshing Open

bug rotation

MESAHub/mesa#1047 · 9 comments · 1 assignee · Opened Aug 25, 2026
using ifort instead of mesasdk Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

MESAHub/mesa#1039 · 6 comments · 1 reaction · Opened Aug 3, 2026
One-way setting of `max_years_for_timestep` Open

bug

MESAHub/mesa#1033 · 3 comments · 1 assignee · Opened Jun 23, 2026
Adding OS used for calculation to data header? Open

MESAHub/mesa#1026 · 4 assignees · Opened Jun 9, 2026
shMESA extras not copying the contents of the RSE template properly Open

bug shmesa

MESAHub/mesa#1018 · 1 assignee · Opened May 27, 2026
Varying atm option fixes rho at 1d-10 Open

atm

Difficulty 4/5 3-5 days Newbie friendliness 48/100

MESAHub/mesa#1014 · 2 comments · Opened May 26, 2026
Make 3.82 also doesn't recognize ''O'' Open

MESAHub/mesa#996 · 2 comments · 1 assignee · Opened May 14, 2026
OPAL/SCVH and Free_EOS fallback to HELM Open

bug eos

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MESAHub/mesa#995 · Opened May 13, 2026
weak rates that exist in reaclib do not respect user custom weak rate tables? Open

bug documentation

Difficulty 4/5 3-5 days Newbie friendliness 45/100

MESAHub/mesa#990 · 5 comments · 1 reaction · Opened May 5, 2026
Setting log_directory to /dev/null can cause mesa to fail Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 52/100

MESAHub/mesa#976 · 3 comments · Opened Apr 23, 2026
Checking of wavelength coverage when calculating bolometric fluxes Open

colors question

MESAHub/mesa#943 · 2 comments · 2 assignees · Opened Mar 28, 2026
Consider reintroducing color BC table options Open

colors

Difficulty 5/5 Over a week Newbie friendliness 35/100

MESAHub/mesa#937 · 6 comments · Opened Mar 25, 2026
`star` executable moved from workdir to `build/bin` on main development version Open

bug

MESAHub/mesa#933 · 1 comment · 2 assignees · Opened Mar 16, 2026
Feature suggestion: Write out physical units used in .data files Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

MESAHub/mesa#922 · 3 comments · Opened Feb 5, 2026
Failing to blend EOS around Z=0.04 Open

bug eos

MESAHub/mesa#921 · 1 comment · 2 assignees · Opened Feb 4, 2026
Version manager Open

discussion

Difficulty 5/5 Over a week Newbie friendliness 20/100

MESAHub/mesa#906 · 2 comments · 1 reaction · Opened Dec 27, 2025
Add work integrals from RSP into star Open

MESAHub/mesa#896 · 1 assignee · Opened Dec 7, 2025
many remove_surface_by_* controls are not functional Open

bug

MESAHub/mesa#888 · 1 assignee · Opened Nov 18, 2025
shmesa does not support user controls Open

bug

MESAHub/mesa#886 · 7 comments · 1 reaction · 1 assignee · Opened Nov 11, 2025
rotation and RTI do not respect no_mix from mlt. Open

bug

MESAHub/mesa#885 · 4 assignees · Opened Nov 8, 2025
Smoother Delta_Pg Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MESAHub/mesa#882 · 2 comments · Opened Oct 27, 2025
Remove_shells functionality needs TDC support Open

tdc test_suite

Difficulty 4/5 3-5 days Newbie friendliness 38/100

MESAHub/mesa#880 · Opened Oct 22, 2025
How to add rates from reaclib that are not in reactions.list? Open

rates-net

MESAHub/mesa#879 · 1 comment · 1 assignee · Opened Oct 21, 2025
mesa_temp_cache behavior Open

discussion

MESAHub/mesa#858 · 1 comment · 2 assignees · Opened Sep 19, 2025
Default controls weaklib prevent nuclear decay Open

MESAHub/mesa#850 · 1 comment · 1 assignee · Opened Jul 30, 2025
rate_list.txt overrules star_job command Open

bug

MESAHub/mesa#849 · 1 assignee · Opened Jul 30, 2025
Al26(p,g)Si27 rates not automatically loaded for isomeric states Open

bug

MESAHub/mesa#848 · 1 comment · 1 assignee · Opened Jul 30, 2025
Large drops in opacity near edges of table Open

enhancement eos kap

MESAHub/mesa#839 · 6 comments · 2 assignees · Opened Jul 2, 2025
dirk methods for higher order time integration Open

enhancement rainy day

Difficulty 5/5 Over a week Newbie friendliness 25/100

MESAHub/mesa#838 · Opened Jun 29, 2025
GPU support Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

MESAHub/mesa#836 · 2 comments · 3 reactions · Opened Jun 26, 2025
Some functions are returning uninitialized values (sometimes silently!) when `ierr /= 0` internally Open

bug

MESAHub/mesa#832 · 1 reaction · 1 assignee · Opened Jun 6, 2025
High values for the thermodynamic consistency metric dsp in blending involving FreeEOS, and as well in OPAL/SCVH tables Open

eos

MESAHub/mesa#822 · 2 assignees · Opened May 21, 2025
ccsn_iip does not run for final.mod created in 12M_pre_mc_to_core_collpase Open

MESAHub/mesa#820 · 2 assignees · Opened May 16, 2025
Increase Unit Test Coverage Open

good first issue rainy day

Difficulty 5/5 Over a week Newbie friendliness 20/100

MESAHub/mesa#805 · 2 comments · 2 reactions · Opened Mar 31, 2025
fe56_fake_factor Open

MESAHub/mesa#801 · 3 comments · 1 assignee · Opened Mar 20, 2025
STELLA has zero unit tests or any consistency checks Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

MESAHub/mesa#798 · 1 comment · Opened Mar 17, 2025
GR1D output: wrongly placed documentation for deprecated feature? Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

MESAHub/mesa#797 · 2 comments · 1 reaction · Opened Mar 17, 2025
running MESA+STELLA Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MESAHub/mesa#793 · 3 comments · Opened Mar 4, 2025
eos fails to build if $MESA_CACHES_DIR is set and contains data from a sufficiently different MESA version Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MESAHub/mesa#788 · 4 comments · Opened Feb 27, 2025
reading star_job_controls from rse doesn't toggle v_flag Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

MESAHub/mesa#777 · 1 reaction · Opened Feb 7, 2025
Improve MESA's linesearch Open

MESAHub/mesa#761 · 2 comments · 3 reactions · 2 assignees · Opened Jan 7, 2025
Tiny Time Steps During High Mass Transfer Rates in Star & Binary (r24.08.1) Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MESAHub/mesa#757 · 5 comments · Opened Dec 2, 2024
Merge functions of model and photo files into one HDF5 file type? Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

MESAHub/mesa#749 · 2 comments · 1 reaction · Opened Oct 30, 2024
Add options for HDF5 history and profile output Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

MESAHub/mesa#748 · 4 comments · 1 reaction · Opened Oct 30, 2024
Repackage EOS tables into HDF5 Open

enhancement eos

Difficulty 5/5 Over a week Newbie friendliness 25/100

MESAHub/mesa#747 · Opened Oct 30, 2024
Repackage kap tables into HDF5 Open

enhancement kap

Difficulty 5/5 Over a week Newbie friendliness 30/100

MESAHub/mesa#746 · Opened Oct 30, 2024
Thermohaline hackathon: FRG24 model with safety=3 fails due to ill-conditioned matrix Open

MESAHub/mesa#738 · 1 comment · 1 assignee · Opened Oct 7, 2024
Missing pp_extras in net documentation Open

documentation rates-net

Difficulty 1/5 Under an hour Newbie friendliness 50/100

MESAHub/mesa#737 · Opened Oct 3, 2024
one-zone burner at constant density Open

MESAHub/mesa#733 · 6 comments · 3 assignees · Opened Sep 25, 2024
Problems creating & evolving low-mass, low-temperature models since r12115 Open

MESAHub/mesa#705 · 3 comments · 1 assignee · Opened Aug 8, 2024

MESAHub/mesa

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