Mysterious planetary system 35 light-years from Earth

While the system is one of the smallest rocky planets ever discovered, astronomers are also concerned about the possibility that an ocean-dominated planet and an Earth-like world could form the habitable zone of its star. You can find these beautiful humans 35 light years from Earth.

At the center of this intriguing system is a red dwarf star called L98-59, also known as TOI-175. Two years ago, a team of astronomers based on NASA’s TESS satellite identified three Earth-sized orbits around each planet.

At that time, the three worlds experienced successive passages of one or more planets between the astral system and Earth, thanks to a transmission system that included the detection of small drops in stellar brightness. The downside of this method is that it only allows you to specify the size of certain elements. However, if we want to know what the planet is made of, this is the bare minimum that researchers need. Find out its mass and radius. From there they can Calculate its total density and estimate its composition..

As part of a recent study, a separate group attempted to classify these planets in another way: radial velocity.

Small planet and marine world.

This technique depends on the movement of the star due to the presence of planets. In planetary systems, all objects, stars, and planets revolve around a center of mass equally. This is the system’s center of gravity.

However, planets, even if they are small, can affect the movement of their star around their center of mass and therefore their light. By carefully examining how a star’s light path has changed over time, scientists can do just that Isolate this oscillation and calculate the mass of the planet of origin.

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The work focused on measurements of the radial velocity of the star TOI-175 . Astronomy and astrophysicsThe confidence of astronomers The largest telescope (VLT) in Chile. This study confirmed the existence of the three initially discovered stars and was able to understand them well. one of them One of the smallest rock creatures ever discovered. This substance is called L98-59b, and it is about half the mass of Venus.

According to the analyzes, the planet and its neighbors seem to have hidden small iron centers, each of which contains a small amount of water in the atmosphere. The third planet is said to have a similar center, but even then there seems to be more water a third of its mass.

Two other planets, one promising

In addition to these three worlds, researchers have also indicated the presence of a rocky fourth planet. The fifth takes place in the living room with its structure.It is able to receive more light and heat from its star than the Sun from Earth.

A comparison of the L 98-59 system (upper) with a region of the inner solar system (Mercury, Venus and Earth) shows the similarity between the two. Credits: ESO / L. Calada / M. Shredder

Therefore, more accurate data would be needed to confirm the existence of this fifth planet, but if so, it could be the target. James Webb Telescope. Once in use in space, perhaps by the end of the year, the lab will be able to focus on studying the atmosphere with an emphasis on searching for manuscripts.


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