Tag Archives: dark energy
You’ve probably read many times that the universe is composed in a measly 4% of normal matter, the one of which is done all you can see, from ourselves to the planets, stars and galaxies. You may also know that the other 23% is composed of what scientists called dark matter, a mystery for physics, undetectable in both the visible light range and the rest of the wavelengths of our telescopes. Even rarer is the remaining 74% of the Cosmos, made by a mysterious force, dark energy.
A group of astronomers, led by Tim Schrabback of Leiden Observatory in the Netherlands, made an intensive study of over 446,000 galaxies observed by Hubble Space Telescope. The results confirm the acceleration in the expansion of the universe, an acceleration attributed to the mysterious dark energy.
In addition to the Hubble data, the researchers, who include Patrick Simon of the University of Edinburgh, used data from ground-based telescopes to map the distances to 194,000 galaxies observed.
The number of galaxies included in this type of analysis is unprecedented, but more important is the enormous amount of information that astronomers have managed to get about the invisible structures in the universe.