Tuesday , November 12 2019
Home / zimbabwe / NASA mission finds a new planet, the most promising stars to support life

NASA mission finds a new planet, the most promising stars to support life


TESS planet hunting mission, NASA only viewing the sky in July, but it is already making an incredible discovery.

In January, three exoplanets discoveries were associated with the initial observations with TESS. Now, the data collected by Tess is the new size of the planet Saturn.

Then (TESS on the & # 39; an object of interest) 197.01 is considered a "hot Saturn." It's like the size of this planet and orbits its host star at a close distance, circling it every 14 days. This close orbit produces a high surface temperature on the planet. The planet is described in an article to be published in The Astronomical Journal.

Asteroseismologists discovered the planet by studying seismic waves, called starquakes in the stars, where & # 39 is the brightness of the shift. Astronomers can determine the age of a star, as well as its mass and radius. On the & # 39; unification of these data with other observations shows the properties of exoplanets orbiting these stars hosts.

Exoplanet with a & # 39 is a gas giant with a radius of nine times larger than Earth and about 60 times the mass of Earth. Which receives 5-star billions of years and a bit heavier and larger than our sun.

"This is the first bucket of water from a fire hose data we receive from TESS,» said Steve Kawaler, study co-author and professor at the University of Iowa Physics and Astronomy, in a statement. "The fact that it is interesting that TESS is the only game in town for a while, and the data are so good that we are planning to try to make the science we have not thought about. Maybe we can look at very faint stars – white dwarfs – that is my first love and represent the future of our sun and solar system ".

Transiting Exoplanet Survey Satellite launched in April to take over the planet hunting relay of the Kepler Space Telescope, as the historical mission has ended.

TESS inspect the area in the sky, which is 400 times greater than that observed the Kepler, including 200,000 of the brightest nearby stars. Within two years, four wide field camera on board will look at different parts of the sky for several days at a time. This will allow scientists to observe almost the whole sky.

This week, a team of astronomers has identified a list of what may be the most promising stars to support planets in the habitable zone, called habitable zone TESS Star Catalog, which was published in the journal Astrophysical Journal Letters.

The catalog includes one thousand eight hundred twenty-two stars TESS could see where the planets slightly larger than Earth will be in the habitable zone of its star. Populated zone called Zlatovlaska area, when conditions with & # 39 are warm enough to allow liquid water to exist on the surface. Liquid water from & # 39 is the basis of life as we know it.

"Life can exist on all kinds of worlds, but the kind we know can support life is our own, so it makes sense to first look for Earth-like planets," said Lisa Kaltenegger, lead author and a member of the TESS team science at Cornell University, in a statement. "This directory is important for TESS, because someone is working with the data, he wants to know the star around which we can find next to the earthly counterparts."

And 408 stars can support planets the size of Earth, who receive the same amount of radiation that we receive from the sun.

"I have 408 new favorite stars," said Kaltenegger. "It is strange that I do not have to choose just one; Now I have to look for hundreds of stars. "

There is also a subset of the 227 stars in the directory where TESS may conduct a broader search for cool Mars-like planets, to provide a greater range of the worlds in the universe.

"We do not know how many TESS planet will find about hundreds of stars in our catalog or will they live," said Kaltenegger. "But the odds in our favor. Some studies indicate that there are many rocky planets in the habitable zone of cool stars, like the ones in our catalog. We are pleased to see that the worlds we will find. "

TESS will search for extrasolar planets using the transit method, watching the small dips in the brightness of stars as planets pass in front of them. Bright stars make it easier Further studies using ground-based and space-based telescopes.

NASA expects TESS to provide cataloging more than 1500 exoplanets, but it does have the potential to find thousands. Among them, officials are waiting, 300 will be Earth-sized exoplanet, or double the size of the Earth's near-earth super. These planets might be the best candidates for life beyond our solar system. Like the Earth, they are small, rocky, and, as a rule, within the residential zone of their stars, that is, liquid water can exist on the surface.

TESS is considered a "bridge to the future," to find exoplanets candidates studied in more detail.

These exoplanets will be studied so that NASA can determine the best targets for missions like James Webb Space Telescope. This telescope launch in 2021, could be described the details and atmosphere ekzoplanut ways scientists have not been able to do.

Source link