Reds vs Blues
Space is a colourful place! Take, for example, this beautiful new photo of a bright star cluster surrounded by blue and red clouds of gas (click on it to see it in full).
The way that the colours are neatly separated makes it look like a competition between the reds and the blues. In the red corner, there’s the gas that our Sun is mostly made of: hydrogen gas! And in the blue corner, we have the mighty Os that we need to breathe: oxygen gas!
Credit:
ESO
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