Astronomers Find Red Dwarf Star Crossing Very Close With Earth 70 Thousand Years Ago

Astronomy Science ~ Astronomers say that a new star has sailed through the outer fringes of our solar system. This star is the star closest...

Astronomy Science ~ Astronomers say that a new star has sailed through the outer fringes of our solar system. This star is the star closest I've ever come close to our solar system - but do not worry, it occurred about 70,000 years ago.

A team of astronomers from the United States, Chile and South Africa said that the star is likely to pass through the Oort Cloud Cloud (cloud comets far) within a distance of 0.8 light-years away from us.

In cosmic terms, it is very close. Our nearest neighboring star, Proxima Centauri is only 4.2 light years away from us.

Scholz star illustration passing very close to the solar system in the past
Scholz star illustration passing very close to the solar system in the past
Low-mass stars, dubbed "Star Scholz" attracted the attention of astronomers' because although quite close in astronomical terms, only 20 light-years away, it has a very slow motion across the sky, known as the tangential motion, say scientists in the Astrophysical Journal Letters.

"Most of the nearest star shows tangential motion is much greater," said study lead author Eric Mamajek, a professor of astronomy and physics at the University of Rochester. "Small tangential movement and proximity initially showed that the star is likely to move towards a close encounter with the solar system in the future or that the meeting occurred 'recently' and the star is moving away.

Further observation confirms that the star running almost straight from around our solar system, "and we realized that star flew near our solar system in the past," said Mamajek.

To plan the trajectory of the past, astronomers using observations of the star's velocity that is currently collected by the South African Large Telescope and the Magellan telescope at the Las Campanas Observatory, Chile.

When flyby near Scholz star may have little impact on the Oort Cloud - star passing in the area of ​​the inner Oort cloud could trigger a "comet showers" and send space rocks into the inner solar system.

Gaia satellite which was recently launched by the European Space Agency is able to map the position and velocity of a billion stars, these satellites may be able to tell us about the other stars who have a close encounter with the solar system in the past or may in the distant future, said astronomer said.

Scholz star, which is a binary system, is a low-mass red dwarf star with a companion star "brown dwarf".

Brown dwarfs are considered as "failed stars," the mass is too low to start the fusion of hydrogen at their core to be a star, but still much larger than gas giant planets like Jupiter, said astronomer explained.

Scholz star named for its discoverer Ralf-Dieter Scholz of the Leibniz-Institut für Astrophysik Potsdam in Germany, which is detected in 2013.
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Astronomy Science: Astronomers Find Red Dwarf Star Crossing Very Close With Earth 70 Thousand Years Ago
Astronomers Find Red Dwarf Star Crossing Very Close With Earth 70 Thousand Years Ago
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