BepiColombo notebook fails: astropy 7 dropped HTTP URL support in fits.open()

[jordanpadams]

🐛 Describe the bug

astropy.io.fits.open() no longer accepts HTTP URLs directly as of astropy 7.x. The notebook passes a URL string to fits.open(), which now raises OSError: No SIMPLE card found, this file does not appear to be a valid FITS file.

🕵️ Expected behavior

Notebook opens FITS files over HTTP and renders the BepiColombo image grid without error.

📜 To Reproduce

1. Install requirements-geo.txt
2. Run notebooks/discipline/geo/BepiColombo_FlybyVisualization.ipynb
3. Cell that calls fits.open(image_path) with an HTTP URL raises OSError

⚙️ Fix

Add fsspec and aiohttp to requirements-geo.txt and pass use_fsspec=True to fits.open(), or download the file to a temp path before opening:

# Option A
with fits.open(image_path, use_fsspec=True) as hdul:
    image_data = hdul[1].data

# Option B
import tempfile, requests
with tempfile.NamedTemporaryFile(suffix='.fits') as tmp:
    tmp.write(requests.get(image_path).content)
    tmp.flush()
    with fits.open(tmp.name) as hdul:
        image_data = hdul[1].data

🖥 Environment Info

• astropy~=7.2.0, Python 3.13.1