Tuesday , July 27 2021

Scientific discovery: NASA hunter discovered three new exoplanets



"The three planets are smaller than Neptune and about 100 light-years away from the solar system"He explained Chelsea Huang, a scientist at the Massachusetts Institute of Technology and a member of the research team. In dialogue with ambito.com, gave details on each of the findings.

"The message C is the first new planet confirmed by the mission, its host star is quite bright and visible to the naked eye, it is only the second transit planet discovered around a star similar to our sun 100 light years away. as a super earth, with twice the radius and a mass five times greater.We already know that there is another super Jupiter in the same system "He explained.

As a reference, it should be borne in mind that the equatorial radius of Neptune is 24,622 km, while that of the Earth is 6,378 km. It would be like comparing the size of an apple to that of a basketball.

When Huang says "In transit" refers to the way in which the Transiting Exoplanet Survey Satellite chase the trail, from is able to detect the passage of a planet in front of its host star, which causes a drop in its brightness and betrays its presence.

"LHS 3844b is only 30% larger than Earth and belongs to a rare planet population that orbits its star very closely.A year there is only 11 hours for us.And it has a temperature of more than 800 ° , then it is likely to be a world of lava ", he added.

"While HD 21749b shows the longest period between planets in transit 100 miles from our solar system: 36 days, it also has the coldest surface temperature of 150 °. With great effort we can determine that it has a density greater than Neptune, although it is not rocky ", said the expert.

But this system had another reserved surprise: "The most exciting thing is that we find a second signal around the same star, a planet almost exactly the size of Earth, although in this case the confirmation still remains". These last two celestial bodies orbit a star of approximately 80% of the mass of the sun.

This is how TESS works.

Mission-sensitive cameras have also captured 100 short and abrupt shifts, most of them probably star blasts and supernova explosions, something that has been very hard to observe before. Even its famous predecessor the Kepler Space Observatory, he was able to capture only a series of these events in his first four years of operations. TESS He's already noticed an interesting amount in his early months.

Using ground-based telescopes, astronomers from NASA, MIT, the University of Cambridge, the Space Telescope Science Institute in Baltimore and more than a dozen universities, research institutes and observatories around the world now they continue to monitor more than 280 candidates for exoplanets.

But Huang does not believe that life can be found in them, since "they are not located in the habitable zone". However, the future will be replete with new discoveries that will increase these possibilities. "We estimate that the TESS will discover more than 10,000 exoplanets, about 500 of them smaller than Neptune and about 50 of them will be 100 light years from the solar system", he predicted.

At the end of his work, he will examine almost the entire sky and provide a catalog of new worlds that will also include about 300 million stars and galaxies and hundreds of supernovae. An invaluable treasure, which will far exceed the nearly $ 350 million that the cost of the mission.


Source link