New map of star systems

NASA has announced a new map with more than 560 million stars, galaxies and asteroids, many of which have never been known before.

The atlas includes over 18,000 images captured by WISE space telescope, according to Wired Science, NASA.

With WISE, scientists discovered Y-dwarf dwarfs, indicating the faintest stars in brown dwarf families. If compared to the sun standards, they are extremely cool.

One of the images captures the remnants of the supernova explosion Cassiopeia A

A Y dwarf discovered in 2011 has a temperature of only 26-27 degrees Celsius, while our sun has a surface temperature of about 5,500 degrees Celsius.

Experts have also discovered the first asteroid to orbit the earth, called a trojan asteroid. Neptune, Jupiter and Mars also have trojan asteroids, but Earth's trojan asteroids are harder to detect because they only appear during the day.

For those who are worried about the apocalypse coming from space assassins, WISE brings many good news. A survey of near-asteroids shows that the number of medium-sized celestial bodies is less than previously speculated by experts.