";s:4:"text";s:3447:" Others say Earth could very well survive the encroachment of the red giant Sun. No one is writing its obituary just yet, but scientists have long known that the sun will die — and now we know what will happen next. Like all stars, the Sun will someday run out of energy. The Sun is about 4.6 billion years old - gauged on the age of other objects in the Solar System that formed around the same time.
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. Of. In about 5 billion years, it's due to turn into a red giant. There's really no way to tell which doomsday scenario will be the cause of our planet's demise, The sun will destroy Earth a lot sooner than you might think.
• Bill Gates made these 15 eerily accurate predictions in 1999, You may not agree with our views, or other users’, but please respond to them respectfully, Swearing, personal abuse, racism, sexism, homophobia and other discriminatory or inciteful language is not acceptable, Do not impersonate other users or reveal private information about third parties, We reserve the right to delete inappropriate posts and ban offending users without notification. Then, it will shrink down to a tiny, extremely dense white dwarf star, about Earth-size. With each passing day this core, known as a white dwarf, will cool and fade hopelessly out of existence (into a cold black dwarf), as if it didn't once host the most lively planet ever discovered in the sweeping canvas of the universe. The data showed that this was correct, but the models contradicted it, which has been vexing scientists ever since the discovery was made. [Rainbow Album: The Many Colors of the Sun]. Future US, Inc. 11 West 42nd Street, 15th Floor, What will our Sun look like after it dies? Such a star no longer produces energy through nuclear fusion, but it contains tremendous amounts of stored heat, in a very small volume (most of the mass of the Sun will be confined to a volume not much larger than the Earth). If it's even still there. You will receive a verification email shortly. Impact. An estimated 90 percent of dying stars emit a ghostly dust halo, which persists for thousands of years, but computer models established decades ago suggested that a star would need to have a mass about twice that of our sun to generate a cloud bright enough to be seen, the study authors reported. This is what makes the planetary nebula visible. It's long been known that most stars wind up producing a planetary nebula, but astronomers thought the sun — a ball of superheated gas with a diameter 109 times that of Earth — was too small to form a visible nebula. Zijlstra said the nebula will form out of an "envelope" of dust and gas ejected by the dying sun, which by then will have swollen to become a red giant that extends all the way out to the orbit of Venus and perhaps beyond. “The predictions for what exactly will happen to Earth as the Sun brightens over the next billion years are pretty uncertain,” Scudder said. Opinions expressed by Forbes Contributors are their own.
This accelerated heating would make it possible even for a star of lower mass, like our sun, to manifest a visible nebula.