January 29, 2022

Beyond Going Long

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Another year will pass before you sleep. They discovered a planet orbiting its “sun” very quickly

The discovery of new worlds is a very important activity for astronomy and a very exciting activity for the general public. To date, more than 4,900 exoplanets have been discovered, some of them Hell we can’t even imagine it.

We still don’t know how they got there

Most of the planets we’ve discovered so far are so-called hot Jupiters, that is, gaseous planets the size of Jupiter, orbiting very close to their host star, causing them to warm up, according to the portal. universe today.

Screenshot / Dave Darling / YouTube

However, we also know other types of planets. One of them is the small, rocky worlds, which also orbit near their star, but are so fast that their orbit period is less than 24 hours.

We refer to worlds as very short-period planets (USPs), one of which was recently discovered by the TESS telescope.

as he writes with On their website, why and how the USP planet got so close to its star that one year lasts less than 24 hours remains one of the unsolved mysteries in exoplanet science.

Unique planet with unique characteristics

But now astronomers have a unique planet at their disposal that could help find a solution. As stated in a study published in the journal Science, the newly discovered world is the planet GJ 367 b, which can orbit its star once every 8 hours.

Given that the planet is about the size of Mars and weighs about half the mass of Earth, it is considered one of the lightest planets ever discovered.

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GJ 367 b orbits a nearby star, a red dwarf named GJ 367 b, located just 31 light-years from Earth. Due to its size and weight, the planet is considered the so-called underground, that is, a planet much lighter than Earth and Venus. Subplanets are among the most difficult types of exoplanets to discover because their small size and mass produce the weakest signal.

According to scientists, it is a rocky planet, most likely containing a solid iron-nickel core, and having a very similar interior to the planet Mercury. Given how close the planet is to the star, it is estimated that it receives up to 500 times more radiation than Earth than the Sun. It is also interesting that the heart is made up of 86% iron.

“We have discovered a planet the size of Mars that has the composition of Mercury” He quotes Roland Vanderspek’s statements on the MIT portal. “It is one of the smallest planets discovered so far and orbits an M-type dwarf in a very close orbit.” Add.

More precisely, GJ 367b reaches 72% of the volume and 55% of the weight of the Earth.

Given the amount of radiation hitting the planet and the fact that it’s hot at 1,500 degrees Celsius, it’s likely not a hospitable and habitable world. Moreover, at such a huge temperature, any atmosphere would long ago evaporate, along with all the signs of life.

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Although GJ 367 b is not an ideal candidate for discovering life, there is a relatively good chance that there are habitable planets in its vicinity. As mentioned, its star is an M-type dwarf, which usually hosts several planets. The very discovery of GJ 367b indicates that there could be many as yet undiscovered worlds in this star system.

“Because this star is so bright and so close to[Earth]we have a good chance of seeing other planets in this system.”Says George Riker.

Current scientists continue to study GJ 367 and hope to record signals from other planets in this system. The properties of these planets (spacing and orbital orientation) could provide some hydrogen for how GJ 367 and other known USP planets approach the star.

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