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Title : Young Version Of The Sun Suggests Life Requires A Magnetic Shield
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Young Version Of The Sun Suggests Life Requires A Magnetic Shield

id = " Star thought to resemble the sun at the time of life appeared in the earth has shed light on what it takes to become inhabited planets. In particular, a strong magnetic field appears to be an essential feature if evolution is to get going. The idea that a powerful shield against magnetic radiation is an essential feature for life has been around for a while. the unlocked radiation is a threat to the DNA. Moreover, it is believed that Mars lost most of its atmosphere to solar radiation that have been blocked as strong as the Earth's field. Now, the idea has the additional stringency, after a study of the star Kappa Ceti. Like the more famous Tau Ceti, Kappa is a very similar to the Sun in the constellation Cetus star and close enough to be easy to study. However, when Tau Ceti is somewhat larger than the Sun, the kappa Ceti is estimated by two different methods to be between 400 and 600 million years. This is conveniently weather in the development of Earth where it is believed that life could have arisen. A study in the journal Astrophysical Journal Letters reports that Kappa Ceti is covered with dark spots often larger than sunspots, experiences strong magnetic starters, and has 50 times as strong stellar wind the sun . Very massive stars have powerful stellar winds, but the mass of Kappa Ceti is only 2 percent higher than the Sun This activity is attributed to the impulsive youth Kappa Ceti, suggesting that the sun now middle-aged once it would have been like. "To be habitable, a planet needs heat, water, and needs to be protected from a young, violent Sun," said first author Dr. Jose Dias-do Nascimento, the Harvard-Smithsonian Center Astrophysics. complex magnetic fields on Kappa Ceti, which change as it passes through its rotation are assigned nine days. Found average field intensity of 24 Gauss and a maximum of 61 Gauss. In comparison, the background of the Sun is 1 to 2 Gauss, although it is much higher for sunspots. model the effects of such active star on a planet with a magnetic field of Earth-like force, do Nascimento found that the magnetosphere that protects the Earth would have been only one-third to half the size it is today, hardly enough to protect the planet and the atmosphere. "The early Earth was not much protection as it does now, but did not have enough," he said in a statement. For any Kappa Ceti planet to be habitable, it would need at least a magnetic field strength near the Earth. a larger sample size to see if this is the norm for sunlike stars will be necessary. If the behavior of the Sun at the equivalent point in his life was something like Kappa Ceti of "early magnetic interaction between the stellar wind and the young Earth planetary magnetic field may well have avoided the volatile loss of the exosphere of the Earth and create the conditions to support life, "concluded the document.
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