Checked the old star charts from 2025 and saw something wild

I was flipping through an old astronomy almanac from last year and found a note about Jupiter's moons. Turns out, one of them, Io, has over 400 active volcanoes on it. I had no idea it was that many. That thing is smaller than Earth's moon too. Found the number in a NASA fact sheet I printed out back in March. Made me realize how much we take these tiny worlds for granted when we just look up at a bright dot. Anyone else ever look up a random stat about a planet or moon and get totally surprised?

2 comments

2 Comments

jake_martin161mo ago

Man, I can barely remember what I had for breakfast yesterday, let alone keep track of volcanic activity on a moon 400 million miles away. That number is insane though, 400 volcanoes on a rock smaller than our own moon? Makes my life feel pretty boring by comparison. I once tried to look up how deep the oceans are on Europa and ended up falling down a Wikipedia hole for two hours. Felt smart for a bit until I realized I still can't find my car keys. But seriously, it's wild what kind of crazy stats are just sitting there in old NASA printouts. Good reminder that space is way weirder and more active than we give it credit for.

nathan_barnes1mo ago

@jake_martin16 I feel you completely, the space Wikipedia rabbit holes are dangerously real. That Europa ocean depth fact you looked up still makes my brain hurt thinking about it.