Extraterrestrial life could exist on frozen and rocky & super-earth. just six light-years away, study finds
A gigantic Super-Earth just six light years away could have the potential to accommodate primitive life, researchers have found.
Barnard b (or GJ 699 b) is a recently discovered Super-Earth planet that revolves around Barnard's Star, making it the second closest star system for the Earth.
The planet is thought to be extremely cold, with temperatures similar to those of Jupiter, Europe, around -150 ° C (-238 ° F).
However, researchers say that it can have a large, hot iron / nickel core and improved geothermal activity, which can make life flourish.
Scroll down for video
There is a frozen & # 39; super-earth & # 39; discovered around the star of Barnard, the closest single star for the sun. Despite surface temperatures of around -150 ° C, scientists believe that sacks of liquid water can be found under the ice that can accommodate life (artist & # 39; s impression)
& # 39; Geothermal heating would & # 39; life zones & # 39; under surface support, similar to underground lakes that occur on Antarctica, & # 39; said Villanova University Astrophysicist Edward Guinan at the 223rd meeting of the American Astronomy Society (AAS) in Seattle, WA.
We note that the surface temperature on Jupiter's icy moon Europe is similar to that of Barnard B. But due to tidal warming, Europe probably has liquid oceans beneath its icy surface. & # 39;
Barnard & # 39; s Star has been on our radar for a long time, & # 39; Guinan said.
The most important aspect of the discovery of Barnard's star b is that the two closest galaxies to the Sun are now known to host planets.
& # 39; This supports previous studies based on Kepler Mission data, leading to the fact that planets can be very common throughout the galaxy, even with tens of billions, & # 39; said Scott Engle, who was co-author of the newspaper.
The newly discovered planet, Barnard's Star b (artist's impression), is believed to be rocky and at least 3.2 times more massive than the earth. It circles a cool red dwarf star, smaller and older than the sun, and completes one track every 233 days
Barnard & # 39; s Star is also about twice as old as the Sun – about 9 billion years old compared to 4.6 billion years for the sun.
The Universe has been producing terrestrial planets for much longer than we, or even the Sun itself, have existed. & # 39;
Barnard & # 39; s Star b, with a mass just over three times that of Earth, revolves around Barnard's Star, a red dwarf star, every 233 days and at about the same distance as Mercury turns around the sun .
It passes the snow line of the dimster.
Although it is very weak, it is possible that Barnard b will be depicted by future very large telescopes, according to Guinan.
"Such observations will shed light on the nature of the atmosphere, surface and potential habitability of the planet," he added.
Despite surface temperatures of around -150 ° C, scientists believe that bags of liquid water can lie under the ice that can accommodate life.
The newly discovered planet Barnard & # 39; s Star b is considered rocky and is at least 3.2 times larger than the earth.
His host, Barnard's Star, is six light years away from the earth – hardly any distance on astronomical scales – with a light intensity that is 0.0035 times that of the sun.
The only narrower galaxy is Alpha Centauri, which consists of three stars connected by gravity, about four light-years apart.
The existence of the planet was confirmed after two decades of observations using different different ground-based telescopes and instruments.
One of them was the new state-of-the-art planetary tool Carmenes at the Calar Alto Observatory in Spain.
Even the most powerful telescopes in use today, Barnard & # 39; s Star b can not photograph directly.
WHAT IS THE STAR OF BARNARD?
Barnard & # 39; s Star is named after Yerkes Observatory & # 39; s E.E. Barnard (1857-1923), who discovered it in 1916.
It is close to not being visible to the naked eye, although at the distance of only six light years it is the second closest star of the earth – if you consider the three stars of the Alpha Centauri system, including Proxima, as a unity.
That is exactly what you would expect from a dwarf with a low, low mass, class M (M4).
At 3.170 Kelvin (2.896 ° C / 5.246 ° F), this dim dwarf has 0.0035 times the brightness of the sun, most of it in the infra-red end of the spectrum.
These emissions show that it has a diameter of only 20 percent that of the sun and a mass of 17 percent of our nearest star.
#Far of rare, the vast majority of the stars fall into the M-dwarf category, they are just as weak – like Proxima Centauri – that they are not visible to the naked eye.
Barnard & # 39; s Star is six light years away from the earth – hardly any distance on astronomical scales – a dwarf dwarf with a brightness of 0.0035 times that of the sun. The only nearby galaxy is Alpha Centauri 4.4 light years away
Barnard's Star is old, born before exploding stars had increased the amount of interstellar metals to what we see today, with a metal content that is only 10 percent of that of the sun.
The age is also confirmed by its long rotation period of 130 days – stars slow down as they age – which is five times longer than that of the sun.
Barnard's Star still has a certain magnetic activity, occasionally caused a flare by the release of magnetic field energy, an active X-ray corona has magnetically heated to two million Kelvin – just like the sun and starspots, whose rotation period is derived.
Barnard's low internal temperature and the resulting weak power generation give him an incredibly long life.
Indeed, no class M dwarf ever born in the history of the Milky Way ever died.