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Astronomers Discover First Binary-Binary Solar System HD 87646, has Primary Star 12 Percent more massive than Sun

The primary star of the new binary system HD 87646 is twelve percent more massive than our Sun

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October 20, 2016: Everything that we have known about the formation of our solar system might be wrong, says University of Florida astronomy professor Jian Ge and his postdoc, Bo Ma. Astronomers have discovered a binary-binary solar system.

This discovered solar system, i.e. two mighty companions revolving around one star in close binary. The  binary system is said to have been named HD 87646, mentioned Science Daily.

The Binary system has one ” giant planet” which is called the MARVELS-7a, and a dwarf planet called the MARVELS-7b. The MARVELS- 7a is 12 times the mass of Jupiter while MARVELS-7b is 57 times the mass of Jupiter.

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According to the Science Daily report, astronomers believed that the planets in our solar system have evolved from a collapsed disk dust cloud, with the larger planet in the system move far away from our primary star.

In the new binary HD 87646, astronomers have noticed that these large companions are in close proximity to the primary star, which means that they have collected way more dust and gas than a particular disk dust cloud can provide. It is probable that they are formed  through some other mechanism.

The primary star of the new binary system HD 87646 is twelve percent more massive than our Sun. The secondary star is ten percent less massive than our Sun, yet the two planets have only 22 astronomical units of distance between them, which is equivalent to the distance between our Sun and Uranus. In spite of the close proximity between the two massive bodies, the stability of the system raises a question on how the protoplanetary disks are formed.

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The planet-hunting Doppler instrument W.M. Keck Exoplanet Tracker, or KeckET, which was developed by a team led by Ge at the Sloan Digital Sky Survey telescope at Apache Point Observatory in New Mexico, is atypical that it can simultaneously observe dozens of celestial bodies.

-Prepared by Enakshi Roy Chowdhury of Newsgram. Twitter: @enakshirc58

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NASA positive on next planet-hunting mission launch

The spacecraft will be looking for a phenomenon known as a transit, where a planet passes in front of its star, causing a periodic and regular dip in the star's brightness

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NASA, Pixabay

Meteorologists with the US Air Force 45th Space Wing have predicted an 80 per cent chance of favourable weather for SpaceX Falcon 9 rocket’s launch with NASA’s Transiting Exoplanet Survey Satellite aimed at detecting planets outside our solar system.

ISS is a permanent base for astronauts stationed in the outer sky. Wikimedia Commons
This mission has NASA very positive. Wikimedia Commons

The launch is scheduled for Sunday at 6.32 p.m. (4.02 a.m. on Monday, India time) on a SpaceX Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida. The primary weather concern for the launch day are strong winds, NASA said in a statement late Saturday. The survey, also known as Tess, is NASA’s next step in the search for exoplanets, including those that could support life.

Once in orbit, Tess will spend about two years surveying 200,000 of the brightest stars near the Sun to search for planets outside our solar system. Tess will find the most promising exoplanets orbiting relatively nearby stars, giving future researchers a rich set of new targets for more comprehensive follow-up studies, including the potential to assess their capacity to harbour life.

Also Read: NASA sending first-ever mission to study Mars’ deep interior

With the help of a gravitational assist from the Moon, the spacecraft will settle into a 13.7-day orbit around Earth, NASA said in an earlier statement. Sixty days after the launch and following tests of its instruments, the satellite will begin its initial two-year mission. Four wide-field cameras will give Tess a field-of-view that covers 85 per cent of our entire sky.

NASA Kepler spaceship will be used.

Within this vast visual perspective, the sky has been divided into 26 sectors that Tess will observe one by one. The first year of observations will map the 13 sectors encompassing the southern sky, and the second year will map the 13 sectors of the northern sky.

The spacecraft will be looking for a phenomenon known as a transit, where a planet passes in front of its star, causing a periodic and regular dip in the star’s brightness. NASA’s Kepler spacecraft used the same method to spot more than 2,600 confirmed exoplanets, most of them orbiting faint stars 300 to 3,000 light-years away. IANS