Nasa hails ‘significant step’ in search for habitable planets

A rocky planet about the size of Earth discovered orbiting a star outside our solar system has been hailed as a “significant step” in the search for habitable worlds similar to our own.

NASA Illustration – AFP

Nick Collins

Kepler-10b, which was found by Nasa’s Kepler space telescope, has an estimated temperature of more than 1,370C (2,500F), which is hot enough to melt iron.

But even though it is far too close to its sun for life to survive, the discovery of the smallest planet to be detected outside our solar system was nevertheless described by scientists as a major breakthrough.

The planet, which is about 1.4 times the size of Earth and completes a full orbit of its Sun once a day, could represent another step in the search for other habitable planets, scientists claimed.

Douglas Hudgins, Kepler programme scientist at Nasa, said: “The discovery of Kepler 10-b is a significant milestone in the search for planets similar to our own.

“Although this planet is not in the habitable zone, the exciting find showcases the kinds of discoveries made possible by the mission and the promise of many more to come.”

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