Latest Nebular hypothesis Stories
[ Listen to the Podcast: “How Planets Form” With Guest Dr. Eric Mamajek (Part 1): Your Universe Today Podcasts ] Lee Rannals for redOrbit.com - Your Universe Online The Subaru Telescope has helped astronomers capture the first vivid infrared image of a distant planet forming from a young star. Astronomers wrote in Astrophysical Journal Letters about an image of a curved arm of dust extending over a hole on a disk, which is a feature that could provide evidence that there are...
John P. Millis, Ph.D. for redOrbit.com – Your Universe Online Starting in early 2013, redOrbit will be launching a new podcast series called Your Universe Today, where we interview leading scientists about cutting-edge research in everything from space travel to the origins of our Universe. But we’re in the holiday spirit and couldn’t wait until January to unveil our new podcast project, so we’ve decided to give you a sneak peak of what’s to come. In the second...
Lee Rannals for redOrbit.com [ Watch the Video: The Birth of a Planet Simulation ] Planetary researchers have a new tool in their artillery when trying to hunt for extrasolar planets. Scientists can now use simulated models developed by a group of scientists of how planets are born, helping the hunt for extrasolar planets. Planets generally form when a molecular cloud collapses into a young star. As the leftover gas and dust form a disk around the star, the particulates inside...
Watch the Video: Artist’s Impression of Glycolaldehyde Molecules | Watch the Video: Sugar Molecules Found in the Young Star Lee Rannals for redOrbit.com - Your Universe Online Most would assume that sugar is an essential part of life, but did you know it is actually considered a building block? Well, astronomers have now found these sweet organic molecules around a distant star. The finding reported in the Astrophysical Journal Letters proves that the building blocks of life were...
Lee Rannals for redOrbit.com [ Watch the Video ] New observations show that small planets may be more widespread in our galaxy than previously thought. Lars A. Buchhave, an astrophysicist at the Niels Bohr Institute and the Centre for Star and Planet Formation at the University of Copenhagen, and colleagues studied the composition of over 150 stars harboring 226 planet candidates smaller than Neptune for the research. Scientists previously thought that the formation of small...
Building a terrestrial planet requires raw materials that weren't available in the early history of the universe. The Big Bang filled space with hydrogen and helium. Chemical elements like silicon and oxygen - key components of rocks - had to be cooked up over time by stars. But how long did that take? How many of such heavy elements do you need to form planets? Previous studies have shown that Jupiter-sized gas giants tend to form around stars containing more heavy elements than the Sun....
The prevailing model for planetary accretion, also called fractal assembly, and dating back as far as the 18th century, assumes that the Solar System’s planets grew as small grains colliding chaotically, coalescing into bigger ones, colliding yet more until they formed planetesimals. The planetesimals then collided until they formed planets as varied as the Earth and Jupiter. The model assumes that this occurred in an extremely hot (as high as 1,600 degrees Celsius) environment for the...
Nanoprobe reveals life history of meteorite from early solar systemScientists have performed a micro-probe analysis of the core and outer layers of a pea-sized piece of a meteorite some 4.57 billion years old to reconstruct the history of its formation, providing the first evidence that dust particles like this one experienced wildly varying environments during the planet-forming years of our solar system.The researchers interpret these findings as evidence that dust grains traveled over...
HOUSTON, March 3, 2011 /PRNewswire-USNewswire/ -- NASA research on a meteorite has provided new evidence that the inner planets formed from materials spread far and wide in the early solar system, and not just from nearby matter. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) Oxygen isotopic measurements in the core and outer rim of a calcium-aluminum-rich inclusion contained in the Allende meteorite record the entire range of oxygen isotopic composition previously measured in...
Astrophysicists use computer simulations to gain new insights on star formationThe first stars in the universe were not as solitary as previously thought. In fact, they could have formed alongside numerous companions when the gas disks that surrounded them broke up during formation, giving birth to sibling stars in the fragments. These are the findings of studies performed with the aid of computer simulations by researchers at Heidelberg University's Centre for Astronomy together with...
Latest Nebular hypothesis Reference Libraries
Cosmogony -- Cosmogony is the study of the origins of celestial objects. It is most commonly used to refer to the study of the origin of the solar system. Currently, the most widely accepted theory is that the solar system was formed roughly 5 billion years ago with the collapse of a nebula of gas and dust, likely caused by shock waves generated by a nearby supernova. The solar system would have formed as a member of a star cluster, now long-since dispersed throughout the Milky Way...
Solar Nebula -- In astronomy, the solar nebula is the gaseous cloud from which, in the so-called nebular hypothesis of the origin of the solar system, the Sun and planets formed by condensation. In 1755 the German philosopher Immanuel Kant suggested that a nebula in slow rotation, gradually pulled together by its own gravitational force and flattened into a spinning disk, gave birth to the Sun and planets. A similar model, but with the planets being formed before the Sun, was proposed...
