The sun used to have rings like Saturn
By Yasemin Saplakoglu published about 11 hours ago
Those rings of dust may have prevented Earth from growing into a "super-Earth."
This false-colored image, captured by the Atacama Large Millimeter/submillimeter Array, shows rings around a young star named HD163296 (not the sun). (Image credit: Andrea Isella/Rice University)
Before Earth and the other planets in our solar system existed, the sun may have been surrounded by giant rings of dust similar to Saturn's, according to a new study.
Those rings of dust may have prevented Earth from growing into a "super-Earth" — a type of planet that is about twice the size of Earth and up to 10 times its mass, according to NASA. Astronomers have discovered super-Earths orbiting about 30% of sun-like stars in our galaxy.
The occurrence of super-Earths in so many other solar systems left astronomers with some unanswered questions: namely, "if super-Earths are super-common, why don't we have one in the solar system?" André Izidoro, an astrophysicist at Rice University in Houston, Texas, said in a statement. To find out, Izidoro and his colleagues created a computer simulation model of the formation of the solar system, which emerged from the ashes of a collapsed cloud of dust and gas known as a solar nebula, Live Science
Their simulations suggested that pressure "bumps," or high-pressure regions of gas and dust, would have surrounded the infant sun. These areas of high pressure likely resulted when particles moved toward the sun under its strong gravitational pull, heated up and released large amounts of vaporized gas.
More:
https://www.livescience.com/baby-sun-had-rings-like-saturn
= new reply since forum marked as read
their contract! 
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