HD 189733b looks deep blue from space, almost Earth-like at first glance — but its colour comes not from oceans, but from silicate particles in a scorching atmosphere where glass may rain sideways through winds of thousands of kilometres an hour.

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HD 189733b is a deep cobalt blue, the first exoplanet to have its visible colour measured (Hubble, 2013). But the blue comes from silicate hazes, not oceans, in an atmosphere above 1,000C with winds near 7,000 km/h. Same colour as Earth, opposite cause. The post HD 189733b looks deep blue from space, almost Earth-like at first glance — but its colour comes not from oceans, but from silicate particles in a scorching atmosphere where glass may rain sideways through winds of thousands of kilometres an hour. appeared first on Space Daily .