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Earth and the Moon. As seen from Mercury orbit.

dude, add a 🧪and 🔭 emoji and your post will automatically get added to science and astronomy feeds

I assume you're joking but if not a testtube and a telescope. They're like hashtags. Anyone who subscribes to the astronomy feed will see every post w a telescope

Honest to god no, I didn't know that (nor could I quite tell what those emojis are). I'll give that thing a go.