"But for the rest, the predicted brightness is very close to what had been observed," Zijlstra added. "We found that stars with a mass less than 1.1 times the mass of the sun produce fainter nebulae, and stars more massive than 3 solar masses brighter nebulae," study co-author Albert Zijlstra, a professor of astrophysics at the University of Manchester in the United Kingdom, said in a statement. There are, however, several problems with this solution. Red dwarf stars like Wolf 359 may have lifespans of trillions of years. This accelerated heating would make it possible even for a star of lower mass, like our sun, to manifest a visible nebula. The Sun compared with stars of various sizes. The data showed a decrease in heart disease and deaths unrelated to cancer and heart disease for those who got the most sun. To solve the riddle, the scientists developed a new computer model for predicting stars' life cycles.Īccording to their new calculations, once expanding red giants eject the dust and gas that make up the nebula, they heat up three times faster than the previous models suggested. Women who avoided the sun had a life expectancy 0.6 to 2.1 years shorter than those in the group with the highest sun exposure. This perplexing, apparent contradiction posed "a long-standing mystery" about the end-of-life stages in low-mass stars, the international team of researchers wrote in the study. 2020 Life Expectancy Table Age Male Life Expectancy Female Life Expectancy Age Male Life Expectancy Female Life Expectancy 60 21.58 24.56 90 4.05 4.78 61 20.83 23.72 91 3.75 4.43 62 20.08 22.90 92 3.48 4.11 63 19.35 22.07 93 3.23 3. Visible nebulas glimmered in young spiral galaxies that were known to host massive stars, which could easily produce glowing dust clouds at the end of their lives, the models predicted.īut nebulas also lit up in old elliptical galaxies populated with stars of lower mass according to the computer models, these stars shouldn't have been able to produce visible clouds at all. However, this prediction didn't align with evidence that twinkled across galaxies.
0 kommentar(er)
