Lesson Retired

[tobyhodges]

This PR adds a notice to the repository README and lesson landing page, to make visitors aware that the lesson is retired.

For more context on this change, visit the recent blog post announcing reductions in Curriculum Team capacity.

[github-actions]

Thank you!

Thank you for your pull request 😃

🤖 This automated message can help you check the rendered files in your submission for clarity. If you have any questions, please feel free to open an issue in {sandpaper}.

If you have files that automatically render output (e.g. R Markdown), then you should check for the following:

• 🎯 correct output
• 🖼️ correct figures
• ❓ new warnings
• ‼️ new errors

Rendered Changes

🔍 Inspect the changes: https://github.com/datacarpentry/astronomy-python/compare/md-outputs..md-outputs-PR-275

The following changes were observed in the rendered markdown documents:

 config.yaml | 2 +-
 index.md    | 8 ++++++++
 md5sum.txt  | 4 ++--
 3 files changed, 11 insertions(+), 3 deletions(-)

What does this mean?

If you have source files that require output and figures to be generated (e.g. R Markdown), then it is important to make sure the generated figures and output are reproducible.

This output provides a way for you to inspect the output in a diff-friendly manner so that it's easy to see the changes that occur due to new software versions or randomisation.

⏱️ Updated at 2026-10-01 09:35:28 +0000