Recommendations for a small, unusual wedding gift?

[ElizaPancakes]

My cousin is getting married in a couple of weeks and I'd like to get her a small gift. She works in astronomy and is quite eccentric, so I'd like to get her/them something a little unusual! As an example, she proposed with a glass cube with Saturn in it

We're not close really and not going to the wedding, but I'd like to get a little something. Has anyone got any bright ideas?!

Baubles for their first Xmas tree. Planet style ones.
nerdshizzle.com/product/the-solar-system-planets-christmas-baubles/

Map of the stars on the day they met, or the day of the marriage. You can get these on Etsy I believe.

Thank you, both are great ideas but I think the map is better as she doesn’t really do Xmas!

Galileo Thermometer, maybe?

Have no idea if you can or how much it would cost but can you buy a tiny meteorite?

I got my friend a lovely leatherbound atlas and a little old style globe.

Also if she works in astronomy she is likely to have been given loads of space/star related stuff in the past?