The oldest galaxy cluster

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An international team of astronomers discovered the most distant known galaxy cluster. The light coming from the cluster Cosmos-AzTEC3 was emitted when the Universe was approximately a billion years old (it is today 13,7 billion years old).
A theory confirmed
Cosmos-AzTEC3 is a “proto-cluster”, a developing group of galaxies, and it is …

Top Ten Astronomy Pictures of 2010

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My personal Top 10 astronomy pictures of 2010:

Moon [Movie]

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Sam Bell (Sam Rockwell) has been working on the Moon for almost three years now, sending back to Earth parcels of Helium-3, the solution to our power problems. Alone. His only companion up there is a computer named GERTY (voiced by Kevin Spacey). A few more weeks and his mission …

Planck – A new map of the sky

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The large scale of the Universe, galaxy clusters and interstellar dust revealed the European Planck satellite some of their secrets.
Launched in 2009 to observe the anisotropies of the cosmic microwave background (CMB), Planck observed the entire sky in millimeter and submillimeter wavelengths. Before the release of its first ultra precise …

Standard candles closer than they appear

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Cepheids, a particular kind of stars, may actually be closer to us than we thought. They are, among others, used as ‘standard candles’: they help us measure cosmic distances, because of a well-defined relationship between their variable luminosity and pulsation period. This is described by the Leavitt Law, named after …

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