New exoplanets discovered near Teegarden’s Star

Researchers discovered two new Earth-like planets near one of our closest neighboring “Teegarden’s star” of about 12.5 light years away from Earth and is one of the smallest known stars.

New exoplanets discovered near Teegarden's StarIt is only about 2,700 °C warm and about ten times lighter than the Sun. Although it is so close to us, the star wasn’t discovered until 2003. The scientists observed the star for about three years. 

Their data clearly show the existence of two planets. “The two planets resemble the inner planets of our solar system,” explains lead author. “They are only slightly heavier than Earth and are located in the so-called habitable zone, where water can be present in liquid form.”

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Although planetary systems around similar stars are known, they have always been detected using the “transit method” the planets have to pass visibly in front of the star and darken it for a moment, which only happens in a very small fraction of all planetary systems.

Such transits have not yet been found for the new planets. But the system is located at a special place in the sky: from Teegarden’s star you can see the planets of the solar system passing in front of the Sun.

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“An inhabitant of the new planets would therefore have the opportunity to view the Earth using the transit method,” says Reiners. The new planets are the tenth and eleventh discovered by researchers.

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