Scientists have made an amazing discovery in what seems to be straight out of science fiction—a planetary system approximately 120 light years away from Earth which includes no fewer than two Earth-like planets! The discovery is turning our understanding of planetary systems and habitability on its head, as we explore the possibility of other forms of life.
What makes this discovery even more remarkable is the fact that the new system revolves around a very stable and calm Sun-like star. While many of the other exoplanets and planetoids that have been discovered till date have been either gas giants or hot planets revolving dangerously close to their stars, this particular system is relatively balanced and stable. Even more astounding is the fact that there are two Earth-like planets in the system.
The two planets are located in the star’s “habitable zone” in which temperatures may permit water to be present on their surfaces – one of the primary requirements for existence of life. Although researchers are extremely cautious about making assumptions regarding these discoveries, it is very thrilling and quite a first time situation when two potentially inhabitable worlds are found in the same star system at the same time. What can we say about their biological status? Did the planets evolve into inhabitable conditions independently of each other or did something happen due to some material exchange between them?
According to preliminary data, the two planets are situated differently with respect to their star and hence, have different temperature levels. One of the planets seems to be closer to the star (thus it should have higher temperatures), while the other planet is further away from the star (so it is supposed to be cooler). This will probably result in completely different conditions of the two planets.
Such discoveries are made due to advances in technology and space exploration. Astronomers could calculate the sizes and orbits of the planets by measuring tiny drops in the amount of light from a star when the planet crosses it using special telescopes and the transit method. Further research, such as spectroscopy, will help to find traces of the presence of water vapor, oxygen or other biosignature molecules in the atmosphere of these distant planets.
However, this discovery is impressive not only because of its scientific value but also because of the closeness of the planets. Since they lie only at a distance of 120 light years, these planets have all the prospects for further investigation and observation with more accurate instruments in the upcoming missions.
Apart from being of great scientific interest, this new discovery can be considered philosophical as well. Humanity has been asking the question whether Earth is unique since ancient times or there are numerous similar planets elsewhere in the Universe, which is why scientists were always interested in exoplanets that resemble our planet.
It is also challenging how planets form and evolve. According to current models, for one habitable planet, specific conditions must be fulfilled. However, the presence of two such planets indicates that nature might be better at creating Earth-like conditions than anticipated before.
Scientists are eager to find more about the atmosphere and composition of these two Earths and whether they are really able to support life as well. Irrespective of whether there is any evidence of living beings on them, the mere existence of these two planets is a strong reminder that our solar system is far from unique.
All in all, besides providing new facts, this particular discovery serves as a stimulus to further explore our imagination. Indeed, whenever people will look into the dark starry sky in the future, they will be aware that among many other celestial objects, there might be a couple of distant planets with oceans and atmosphere similar to ours.
Team Yuva Aaveg-
Adarsh Tiwari
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