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A new “Earth” bigger and older.



The Kepler Mission NASA has discovered the first planet from the size comparable to that of the Earth situated in the area suited to the life of a star similar to our Sun.

In the illustration, the Earth (left) confronted with the new planet, called Kepler-452b, with a diameter about 60 percent larger than our planet. It’s called Kepler-452b, and is slightly larger than the first planet discovered in Earth’s “habitable zone” of a star similar to our Sun: NASA has announced, marking a milestone in the long-running search for other worlds like ours. The planet newly discovered fact is the smallest among those identified so far in orbit around a star of the G2 type (such as the Sun) at a distance that allows the presence of water in liquid form. In the twentieth anniversary of the discovery of the existence of other solar systems, Kepler detected the planet and the star that so far more resemble the Earth and the sun.

Kepler-452b has a diameter 60 percent larger than Earth. Its mass and its composition has not yet been established, but research conducted to date indicate that there are very good chances that planets of this size are rocky. Although Kepler-452b is larger than Earth, its orbit of 385 days lasts only 5 per cent more than that of our planet, and it is 5 percent farther from its star, Kepler-452 call, what the Earth is from the sun. Kepler-452 has 6 billion years 1.5 billion more of the Sun, which has the same temperature while being 10 percent larger and 20 percent brighter. We can consider Kepler-452b an older cousin and older than the Earth. This is an opportunity to study and understand the possible evolution of the terrestrial environment. It is amazing that this planet has spent 6 billion years in the habitable zone of its star, most of the Earth. With ‘ingredients’ and the necessary conditions, there are real possibilities because there are life forms. In addition to announcing the discovery of Kepler-452b, the space telescope team also claimed to have increased by 521 the number of possible planets detected by Kapler in four-year mission, bringing the total number of candidates in 4696. We will indeed require further observations to confirm that they are actually planets. Among the new planets, twelve seem particularly promising: have diameters 1:00 to 2:00 times the Earth, and orbit in the habitable zone of their star, which in nine cases is similar to our Sun in size and temperature.

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To open the video click on the image, good view from your Alessandro Brizzi.