He also proposed that comets with very long periods come from a vast cloud (later named the Oort cloud) of small bodies that orbit the Sun at a distance of about one light-year. The Oort cloud is thought to comprise two regions: a spherical outer Oort cloud and a disc-shaped inner Oort cloud, or Hills cloud. For comparison, the closest star to us is 4.2 light-years away, so the Oört Cloud reaches almost that far. But the Oort Cloud is a shell that surrounds the entire solar system, and is a hundred times as distant. Objects in the Oort cloud are largely composed of ices, such as water, ammonia, and methane. The Oort Cloud is a long-period comet reservoir located in the outermost edge of the solar system. These objects fall from what has become known as the Oort cloud. Planet hiding in the Inner Oort Cloud. At its outer "edge," the cloud stretches into interplanetary space some 3.2 light-years. It's very distant from us, with an inner boundary 10,000 times the Sun-Earth distance. The Oort cloud, or Öpik–Oort cloud, is a cloud of comets and other objects. It is believed to surround the Sun and extend outward halfway to the star closest to the Sun. No one knows for sure how many objects exist in the Oort Cloud, but most estimates put it at around 2 trillion. He was born on April 28, 1900 in Friesland state of Netherlands. The planet-like object, Sedna, was discovered in 2004 and found to have an orbit that takes it well beyond the outer edge of the Kuiper Belt. This suggests that the Oort cloud is closer than previously believed, or that there exists an ‘inner’ Oort cloud which is basically an extension of the Kuiper Belt. 1.Prior to 1950, scientists didn’t have the slightest of idea that something like that could even exist. He was … But the Oort Cloud is a shell that surrounds the entire solar system, and is a hundred times as distant. The cloud is thought to explain the existence of certain comets. It was discovered in 1950 by famous Dutch astronomer, Jan Hendrik Oort. The inner edge of the cloud is believed to be around 2,000 to 5,000 AU while the outer edge at 10,000 to 100,000 AU.. The inner edge of the cloud is believed to be around 2,000 to 5,000 AU while the outer edge at 10,000 to 100,000 AU.. There is believed to be two Oort Clouds, an Inner and an Outer. In the 1950’s, astronomer Jan Hendrik Oort proposed that the long-period comets are objects that fall inward. The Oort Cloud. If Sedna indeed belongs to the Oort cloud, this may mean that the Oort cloud is both denser and closer to the Sun than previously thought. What is the Oort Cloud: The Oort Cloud is found to be roughly spherical, whereas its origin is said to date back to those long-period comets that have clustered the Solar System since the early days of its creation. So far, only three potential Oort cloud objects have been discovered, 90377 Sedna, 2000 OO 67 and 2000 CR 105. Comets from the Oort Cloud can travel as far as three light-years from the sun. The planetoid Sedna, discovered in 2003, is thought to be a member of the inner Oort Cloud.