NASA scientists said on Friday that the comet that sailed by Mars last month produced thousands of shooting stars per hour and formed a new layer of ionized metals high in the planet's atmosphere.

When Comet C/2013 A1, aka Siding Spring, deposited big amounts of dust and ice on Mars, the atmosphere of Mars was changed.

There is possibility that comets can be the transportation system of the universe. They take ancient minerals and water as they fly huge distances, leaving a trail of debris behind.

To complete circle around the sun, Siding Spring will take about one million years. It created in the Oort Cloud at the far limits of the solar system.

The Oort Cloud is a far-away region, between 5,000 and 100,000 AUs from the Sun. It involves trillions of icy objects made up of material that was hardly caught in the gravitational pull of the sun. Actually, the Oort Cloud is impacted by the pull of close by stars and the Milky Way disc. Sometimes, objects in the Oort Cloud start to fall towards the center of the solar system.

For the first time last month astronomers were able to notice an object from the Oort Cloud as Siding Spring buzzed past Mars and Earth on its way to loop around the Sun.

Traveling at 35 miles per hour, it passed somewhat near to the red planet and showered Mars with cometary ice and dust. Actually, the meteor storm triggered by the comet altered the composition of the atmosphere of Mars.

With the help of data gathered from several orbiting spacecraft, astronomers observe the extent and brightness of the ultraviolet emissions left from the collision. The comet had a huge effect on Mars than scientists projected.