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Of Stars and Dark Matter

Posted Aug 21, 2006 at 01:11PM by Robert S. Listed in: News, Astronomy, Celestial Bodies Tags: galaxy, Dark Matter
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Dark Matter


Galaxies are made up of stars, planets, gas, and (theoretically) Dark Matter. This is the driving force that shapes and moves planets, galaxies, and stars around the universe. However, it can only be proven with calculations and possible sightings...until today.

Scientists have found direct evidence of Dark Matter. Clowe and Zaritsky were viewing a galaxy collision, when they noticed that although the gas clouds when hitting each other tends to slow down, the galaxies themselves were going into each other without slowing down. The scientists then analyzed the light bending near the galaxies, they analyzed that the masses in front of the speeding galaxies were far more than expected. After further analysis of the shapes and patterns in distorted light, they saw a mass of non-luminous matter that is greater than the mass created by the gas cloud in front of the galaxies.

In short, the "Dark Matter" ploughs right through the gas clouds and the other galaxies it's colliding with. According to the scientists, Dark Matter is collisionless.

We now know that Dark Matter exists, we just have to know what it's made up of.

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