2013年3月3日星期日

A Star Is Born? No, But Maybe a Planet

Astronomers have spotted what they believe is a planet in the dramatic and violent process of being born in another solar system, an event that may shed light on how planets come into being.An international team of researchers said the so-called protoplanet has a mass that appears to be at least the size of Jupiter, and perhaps two to three times its size. It is located about 335 light years from Earth, within the Milky Way.Buying individual blankets and Xinjiang Intencive tour covers can be a very difficult task to undertake since it involves a lot of matching and mixing. That isn't too far in cosmic terms; the Milky Way itself is about 100,000 light years across. "If we are correct,However, not all men think that way; thus, they do not pay much attention to the types of knives wholesaler they have in the drawer.Since a lot of men are not exactly kitchen persons, they seldom look past the sharp edges of these knives. this is the first time we are seeing a planet forming inside its natal environment," said Sascha Quanz, an astronomer at the Swiss university ETH Zurich and leader of the team. The findings are reported in Astrophysical Journal Letters, a scientific publication.There are two leading theories of planet formation. Under one, small dust grains circling around a parent star collide, get larger and larger, and under the force of gravity develop into a much larger object. Over hundreds of thousands of years, this object accumulates enough material to become a planet. That is how the planets of our solar system most likely formed. Another theory suggests that material surrounding a young star can undergo gravitational collapse under its own mass. This causes debris to clump together in that region, creating a planet in just a few thousand years. It isn't clear how the latest suspected protoplanet is being formed.To give a gift which is unique and more likely to be worn regularly, consider Ceramic Whisky Stones manufacturers or body jewellery.Toe rings are ideal for spring and summer wear as they look beautiful with bare feet, sandals and flip flops.Spotting the earliest birth pangs of a planet is notoriously hard. In 2011, astronomers said they had discovered a protoplanet, though some signs indicated it was an older entity.For last impression and to make a day perfectly memorable, people prefer artful Granite Whisky Stones manufacturers items to keep their families and loved ones always connected. In January,Silk road tours another team of researchers reported evidence of vast streams of gas flowing across a gap in a disk of material around a young star. Giant planets, they surmised, would guzzle gas in a similar way as they grow.If it holds up, the latest finding would be one of the first direct observations of the very early stages of a planet's birth. Dr. Quanz and colleagues based their discovery on observations by a high-resolution infrared camera linked to a telescope located in Chile's Atacama Desert.The telescope was pointed at a young star, HD 100546, about 2.5-times the size of our sun. Astronomers were interested in the star because the disk of materials around it showed certain asymmetries. "It's a good indication that something might be hiding or forming in the disk," said Dr. Quanz.

没有评论:

发表评论