NASA has launched a mission to a uncommon asteroid lined in steel that's two billion miles (3.6bn km) and 6 years' journey time away from Earth.

Scientists hope exploring the Psyche asteroid will assist them perceive extra about how Earth shaped and what makes it liveable.

Lead scientist Lindy Elkins-Tanton, of Arizona State University, mentioned: "It's long been humans' dream to go to the metal core of our Earth. I mean, ask Jules Verne.

"The strain is just too excessive. The temperature is just too excessive. The expertise is unimaginable. But there's a method in our photo voltaic system that we are able to have a look at a steel core and that's by going to this asteroid."

Most asteroids are usually rocky or icy, and that is the primary have a look at a steel one - the staff can also be hoping to take the first-ever photographs of it.

Potato-shaped rock is 150 miles vast

Psyche, which will be the battered stays of a planetesimal, or a constructing block of a rocky planet, is the most important of the 9 metal-rich asteroids found to date, NASA mentioned.

The potato-shaped rock measures about 144 miles by 173 miles (232km by 280 km) at its widest and has a mass of about 440 billion kilos.

It will dwarf the van-sized spacecraft, with photo voltaic panels sufficiently big to fill a tennis courtroom.

Also known as Psyche, the spacecraft was launched on a SpaceX Falcon Heavy rocket from NASA's Kennedy Space Centre, in Florida, on Friday.

The company believes the asteroid, which orbits the solar between Mars and Jupiter, is brimming with iron, nickel and different metals - and fairly presumably silicates. It is a uninteresting gray color, most likely as a result of its floor is roofed with high-quality steel grains from cosmic impacts.

Metal cliffs and lava flows

It was found in 1852 and named after Greek mythology's fascinating goddess of the soul.

As to what they'll discover, scientists think about spiky craters, enormous steel cliffs and metal-encrusted eroded lava flows which are greenish-yellow from sulfur. However, Ms Elkins-Tanton admitted that's "almost certain to be completely wrong".

Tiny quantities of gold, silver, platinum or iridium - iron-loving parts - could possibly be dissolved within the asteroid's iron and nickel, she mentioned.

"There's a very good chance that it's going to be outside of our imaginings, and that is my fondest hope."

Believed to be a planetary constructing block from the photo voltaic system's formation 4.5 billion years in the past, the asteroid can assist reply basic questions corresponding to how life started on Earth and what makes our planet liveable, in keeping with Ms Elkins-Tanton.

Read extra:NASA's 'incredible' findings from asteroidWhat is asteroid Psyche and what can it tell us?

Led by Arizona State University on NASA's behalf, the $1.2 billion (£985m) mission will swoop previous Mars for a gravity increase in 2026.

Three years later, it's going to attain the asteroid and try to enter orbit round it, circling it at a distance of between 47 and 440 miles (75 and 700 km) till at the very least 2031.