The Stardust Mission brought back dust samples from Comet Wild 2 that was different from what scientists expect.

Science Daily said that scientists only expect to find primitive meteorites and circumstellar grains from the comet.

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However, they found small-size dusts that can be found from the Sun and Asteroid belts of our inner Solar System.

NASA said that their scientists found Calcium Aluminum Inclusions (CAIs), rare white irregular particles.

CAIs can be distinguished by their unusual chemical and isotopic compositions.

It was considered among the oldest solar system materials that was composed of substances formed on extreme temperatures.

According to Windows to the Universe, Comet Wild 2 was discovered by Swiss Astronomers Paul Wild in January 1978.

The comet orbits from the Sun once every 6.39 years which was faster than other comets that takes 100 years to go around the Sun.

It has an oval orbit that is closer to the Sun than Mars and reaches beyond Jupiter's orbit. In 2004, Stardust flew into Comet Wild 2 to photograph its nucleus and gather dust samples.

Ryan Ogliore from University of Hawaii said that they are still baffled whether the dust from the comet represents a diverse sample of many inner solar system materials or the starting material of our solar system.

Ogliore explained that they might be looking at a very diverse sample of fine-grained inner solar system material.

He said that the comet's nucleus was made of small rocks and ice that were separated for a fraction of an inch that were originally formed billion of miles apart.

There were some rocks that have a temperature of above 2,500 degrees Fahrenheit while adjacent ice has a temperature close to zero.

Comet Wild 2's material came from extremely hot and cold conditions. They explained that some of the materials found on the comet were formed between Mars and Jupiter.

TagsStardust, Comet Wild2, Science, technology, NASA