Classification of meteorites

While there are different classifications, one of the most important is the collecting feature of composition and origin of meteorites. In this division we find:

1) Primitive: is the most primitive material in the solar system (they have several billion years) that have remained virtually unchanged since they formed, ie never suffered melting or differentiation processes.

The universe is older than before idea

The European Planck spacecraft has gained the most accurate and detailed map ever made ​​of the oldest light in the universe. The results of this map suggest that the universe is expanding more slowly than scientists thought, and that is 13,800 million years, 100 million years older than previously believed. The data also show that in the universe there is less energy and dark matter than previously known.

Five quotation marks from Einstein on relativity

A day like today, namely the March 20, 1916, Albert Einstein formulated his theory of relativity. Here are five clever lines set by the German physicist about his most famous creation.

"When courting a beautiful girl, an hour seems like a second. But you sit on red hot coal; a second seems like an hour. That's relativity." Albert Einstein.