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Astronomers have until now discovered Earth-like exoplanet – universe – science and technology.



Tess

Constellation system GJ 357. The planet GJ357D is located in a habitable zone and is similar to Earth.

Author:

The Transit Exoplanet Research Satellite (TSS), launched by NASA in space last year, is a success story.

Helps identify exoplanet – planet outside the solar system –
Designation with GJ 357D, which is in the habitable zone only for its star rotation
31 light years from Earth. It is the closest planet ever
Earth is like that.

The TESS telescope discovered for Exoplanet helped around the parent star GJ
357 also declares two other planets: GJ357B and GJ357C. However, he does live
The 357D may also be habitable very close to the "superz."

GJ357D takes place in a so-called habitable zone
Its not too hot not to be too far from your star, but
Close enough to not be too cold. According to the area
If rocky, NASA might have water on the surface of the planet.

How was the search done? NASA says on its website that TSS itself
All in February alone, the planet orbited the GJ357B
Around the star with a duration of 3.9 days.

Scientists later used data from terrestrial spectrographs, for example
Carmen, Harps or Hires to find other planets. Check out the others
She couldn't see the planet because they didn't transmit – they didn't come from us
Looking through the Star Disk. Only their weight was determined.

The planets orbit a red dwarf orbiting a star called GJ357
A third of the sun's weight and size and 40 percent cooler than that
Our star entire system is located at a distance of 31 light
Years in the constellation Hydra.

“In a way, these planets have been hidden in measure for many years
"A lot of the observations are being conducted," said Rafael Luke, a PFD student
From the Canary Institute Astrophysics (IAC) in Tenerife, which he led
Research team. "It took TSS to guide us to a fascinating star,
So that we can find them. & # 39;

Detected by NASA's research satellite, GJ357B shows the path
In another world revolving around a single star GJ357, only one
Located in your habitable area. This is the GJ357D above.

& # 39; The GJ357D is located on the outer edge of its habitable zone
The star, where it receives almost equal stellar energy from you
From the sun like Mars, ”explained Diana Kosakowska, co-author of the study
From the Max Planck Astronomical Institute in Heidelberg, Germany.

As long as the planet has a gaseous and warm enough atmosphere, that will determine
In future research, she may get enough heat for it
Heat and leave liquid water on the surface.

Average temperature without the effect of atmospheric temperature –
64 ° C Planet GJ357D is at least 6.1 times the mass of the Earth's mass
Orbits the star every 55.7 days at a distance of 20 percent of the Earth
From the sun The size and composition of the planet is not known, but the rocky world is
With this set, it can double the size of the Earth.

"Who knows, maybe we can find stamps with binoculars soon, too
Life, "according to USA Today astronomer Lisa
Kalteniger, Director of the Carl Sagan Institute at Cornell, USA

For example, the GJ357B is 11 times orbitally about 22 percent larger than the Earth
Our Sun is closer to the star than Mercury. It gives her
Average temperature of at least 254 ° C

"So GJ 357b is referred to as" hot Earth, "he noted
Co-author of IAC's astrophysicist Enrique Pulley. “Even though he can't host
Life is noteworthy, as the third nearest known transit exoplanet and
One of the best rocky planets to measure the composition of anyone
Atmosphere, ”he admires.

The mass of GJ357c, the central planet, is at least 3.4 times larger
Like the earth, it orbits its parent star every 9.1 days and at its temperature.
They reach 127 ° C.

From telescope, TESS is exploring new planets outside the solar system
Launching it in April 2018. It focuses specifically on the planet
Some 200,000 are orbiting the brightest and closest stars to Earth.

"The satellite will search for other planets around the stars
Watch the planet pass against the stars. It will show us that
We must examine the stars so that we can then study certain planets
In detail Then we will know that we should turn to them
Extra telescopes, "said Paul Hertz, NASA astrophysicist last year.

“With a large telescope, we can detect different characters
This can tell us what to do in the atmosphere of the planets or what to do
Do planets compose and do they have those types of gases in the atmosphere that are moving
Earth sign of life. However, TESS does not find life forms in itself
It will help to find where to show binoculars, "he said.


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