How Many Earths?

Ever wondered how many stars in the night sky had planets like Earth going around them? That’s what this interactive feature for New Scientist is about. I built it with my colleagues Peter Aldhous and MacGregor Campbell, using data from the Kepler space telescope. Rather than taking up more space here, I’ll let the feature speak for itself; I hope you enjoy it as much as I do.

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A Cosmic Picture of Your Ancestors

Big news this week! The full data set from the Planck satellite has finally been released to the public and the scientific community at large. Cosmologists around the world have been itching to see this data for years, and with good reason: Planck has given us our sharpest full-sky image of the cosmic microwave background radiation, the oldest light in the universe….

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Where were all of the things a long time ago? Can we find out by looking at things now?

Some of my friends and I use big computers to try to find out where stuff was — all of the stuff, in every place out in space — in the first tiny part of a second, at the beginning of time. We do this by looking at where all of the stuff in space is now, and trying to guess what that means about where stuff was before. But it is very hard to do that, even with a big computer….

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