Astronomy Essay: NASA Find 7 Habitable Planets
The space agency NASA made a sensational statement – it discovered seven planets about the same size as the Earth, which are located in the same star system. At the press conference, NASA said that three planets are placed in in an area where life is possible and therefore highly likely to contain water in the liquid condition, making them suitable for life.
The agency explained – liquid water can exist on each of the planets, but only three bodies contain it with the greatest probability. They managed to find using a telescope «Spitzer». So far, the scientists explained that did not receive artificial signals emanating from these celestial bodies.
Planets evolve around TRAPPIST-1, the star located in forty light years from the Earth, allowing NASA to consider the superficies of celestial bodies. They are situated in the liveable zone – a region where there are enough light and warmth to find water in liquid condition.
Researchers said that the detected system is great for learning, and is an excellent candidate for a place to detect extra-terrestrial life.
NASA experts explained that for the first time they managed to find several planets similar to Earth, in one place and so close to one star.
Planets are situated much closer to the TRAPPIST-1 than our Earth relative to the Sun. In addition, celestial bodies are so close to each other that, in theory, from the superficies of one body you can see mountains and clouds on the superficies of another.
NASA explained that planets may not revolve around stars that are too close, so they do not have a change of day and night. Experts said that due to this fact weather conditions on these celestial bodies can be very different from terrestrial.
On the question of how soon the ship will be able to go to the named planets, NASA did not answer, saying that while it is impossible. However, the agency noted the recent jumps in technology explaining that the existence of such a telescope that discovered these exoplanets, no one imagined 10 years ago. Exoplanets are planets orbiting around a star other than the Sun.
All seven planets are similar in size to the Earth – their range is from 0,7 to 1,08 radius of our planet, and weight – from 0,41 to 1,38. Accordingly, their density is equal to terrestrial or slightly below it, indicating their possible stony nature, or that they are the planets-oceans.
There’s no promise until now that planets have something resembling a life. There are many factors that can impede this Severe space weather, phenomenon unpredictable, can destroy the germs of life. However, for the most part, forecasts are optimistic. TRAPPIST-1, as a star of «red dwarfs » type, is quite calm and does not behave too active for its class. Due to the resonance of the orbit, the planet can get some benefit. It lies in the fact that the core of the planet gets more warmth and it helps to run the processes, which are necessary for the occurrence and sustaining of the life.
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