🔤 EHT A-Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡 W is for Water Vapor
While Earth's atmosphere is crucial for our survival, water vapor within it absorbs some of the signal we want to analyze from black holes.

That’s why we build our radio telescopes in high, dry places- typically on tall mountains where the air is thin and the skies are clear.