Two Exoplanets Found Orbiting Around 8-Billion-Year-Old Red Dwarf (Download PDF)

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Astronomers at Calar Alto Observatory have found evidence of two potentially habitable exoplanets orbiting around The Teegarden’s Star. The instrument used for this purpose was Calar Alto high-Resolution search for M dwarfs with Exoearths with Near-infrared and optical Echelle Spectrographs in short better known as Calar. It is a next-generation instrument built for the 3.5m telescope at the Calar Alto Observatory by a consortium of German and Spanish institutions.

Teegarden’s Star is one of the brightest and nearest ultra-cool dwarf stars in the solar neighbourhood. Exoplanet is a planet that orbits a star outside the solar system.

This is image show in Solar system

This is Image Show in Solar System

This is image show in Solar system

This is image show in sunset teegardens star

This is Image Show in Sunset Teegarden’S Star

This is image show in sunset teegarden’s star

Observations

  • With a distance of 12.5 light-years away Teegarden’s Star is located in the constellation Aries. It is 24th nearest star to the Sun.

  • This star was discovered in 2003 by NASA astronomer Bonnard Teegarden and colleagues.

  • With a solar radius of 8 % this star has a mass of around 8 % that of the Sun, and a temperature of about 4,800 degrees Fahrenheit (2,630 degrees Celsius).

  • For its spectral type of M7 V, it shows relatively little activity.

  • Teegarden’s Star was observed for three years, looking for periodic variations in its velocity.

  • Existence of two planets was clearly observed based on the observation of data. They resemble the inner planets of our Solar System, are only slightly heavier than Earth and are located in the so-called habitable zone. “

  • Teegarden’s Star b and c, the new planets have minimum masses of 1.05 and 1.1 Earth masses, respectively, and are among the lowest-mass planets discovered so far.

  • There is a possibility of liquid water at the point where the planets orbit inside the star’s habitable zone. One of the planets would need to have a rather special atmosphere in order to allow for water on its surface. Their orbital periods are 4.9 and 11.4 days, respectively.

  • It would be easier for hypothetical intelligent beings in few decades based on the observations collected on one of those planets to detect Earth than the other way around.

  • Teegarden’s star will be positioned to see the Solar System edge between the years 2044 and 2496.

  • The inhabitants of this Star should be able to detect Earth using the so-called transit method as they see our planet pass directly in front of the disk of the Sun.

  • The Estimates put the system’s age at around 8 billion years, nearly twice as old as our own planet.

- Published/Last Modified on: August 21, 2019

Science/Technology, Space/ISRO

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