Rich exoplanet system discovered 24 August 2010Last updated at 14:03 By Victoria Gill Science reporter, BBC News The researchers say the finding marks a new phase in the hunt for exoplanets Astronomers have discovered a planetary system containing at least five planets that orbit a star called HD 10180, which is much like our own Sun. The star is 127 light years away, in the southern constellation of Hydrus. The researchers used the European Southern Observatory (Eso) to monitor light emitted from the system and identify and characterise the planets. They say this is the "richest" system of exoplanets - planets outside our own Solar System - ever found. Christophe Lovis from Geneva University's observatory in Switzerland was lead researcher on the study. The discovery could provide insight into the formation of our own Solar System "This also highlights the fact that we are now entering a new era in exoplanet research - the study of complex planetary systems and not just of individual planets," he said. “Start Quote
Unprecedented: Amateur astronomers discover a planet with four suns False. At least in understanding, suns can be anywhere, Sol is the name of the star we orbit. Take your innacurate indignation elsewhere I thought we were in the Sol system? From what I've observed, a 'sun' is a title we give a star in relation to objects in its system, such as how we call large satellites 'moons'. I think it's more about point of view. Had the title read "solar system with four suns", I might not disagree with you, but we're talking about a planet; that planet orbits four stars, therefore that planet has four suns. Darkest exoplanet spotted by astronomers 12 August 2011Last updated at 11:09 By Jason Palmer Science and technology reporter, BBC News TrES-2b is literally darker, on average, than coal A dark alien world, blacker than coal, has been spotted by astronomers. The Jupiter-sized planet is orbiting its star at a distance of just five million km, and is likely to be at a temperature of some 1200C. The planet may be too hot to support reflective clouds like those we see in our own Solar System, but even that would not explain why it is so dark. The research will be published in the journal Monthly Notices of the Royal Astronomical Society. The planet, called TrES-2b, is so named because it was first spotted by the Trans-Atlantic Exoplanet Survey in 2006. It also lies in the field of view of the Kepler space telescope, whose primary mission is to spot exoplanets using extremely sensitive brightness measurements as far-flung worlds pass in front of their host stars. 'Exotic chemistry' Continue reading the main story
Exoplanet HD 189733b Determined to be Color Blue Like the Earth A planet discovered in 2005 in the constellation of Vulpecula (the Fox) was determined to be colored blue with the help of the NASA/ESA Hubble Space Telescope. The blue colored planet is similar to how the Earth's color looks like from space. The planet, HD 189733b which is a huge gas giant similar to the planet Jupiter, is 63 light years away and is closely orbiting its host star; around 1/30 the distance the Earth orbits the Sun. Scientists have determined that the blue color of the planet is because of silicate particles in its atmosphere which scatters blue light. By measuring how much radiation is reflected, a technique known as Albedo, scientists can determine the amount of light reflected. Astronomers using the NASA/ESA Hubble Space Telescope have, for the first time, determined the true color of a planet orbiting another star. But that's where the similarities end. Video: Hubble Telescope Discovers Blue planet HD 189733b HD 189733b is faint and close to its star.
Astronomy Astronomy is a natural science that is the study of celestial objects (such as moons, planets, stars, nebulae, and galaxies), the physics, chemistry, and evolution of such objects, and phenomena that originate outside the atmosphere of Earth, including supernovae explosions, gamma ray bursts, and cosmic background radiation. A related but distinct subject, cosmology, is concerned with studying the universe as a whole.[1] Astronomy is one of the oldest sciences. Prehistoric cultures have left astronomical artifacts such as the Egyptian monuments and Nubian monuments, and early civilizations such as the Babylonians, Greeks, Chinese, Indians, Iranians and Maya performed methodical observations of the night sky. However, the invention of the telescope was required before astronomy was able to develop into a modern science. During the 20th century, the field of professional astronomy split into observational and theoretical branches. Etymology[edit] History[edit] Scientific revolution[edit]
Moonless Earth Could Potentially Still Support Life, Scientists Say Scientists have long believed that, without our moon, the tilt of the Earth would shift greatly over time, from zero degrees, where the Sun remains over the equator, to 85 degrees, where the Sun shines almost directly above one of the poles. A planet's stability has an effect on the development of life. A planet see-sawing back and forth on its axis as it orbits the sun would experience wide fluctuations in climate, which then could potentially affect the evolution of complex life. However, new simulations show that, even without a moon, the tilt of Earth's axis — known as its obliquity — would vary only about 10 degrees. The stabilizing effect that our large moon has on Earth's rotation therefore may not be as crucial for life as previously believed, according to a paper by Jason Barnes of the University of Idaho and colleagues which was presented at a recent meeting of the American Astronomical Society. As the world turns Similarly, a planet's orbital plane also precesses.
First 'habitable' exoplanet confirmed Gliese 581d is the outlying planet in the Gliese 581 system, and orbits its parent star every 66.8 days. It may be covered by a large and deep ocean and is the first serious 'waterworld' candidate discovered beyond our Solar System. Credit: ESO/L. Calçada PARIS: A rocky world orbiting a nearby star was confirmed as the first planet outside our Solar System to meet key requirements for sustaining life. Modelling of planet Gliese 581d shows it has the potential to be warm and wet enough to nurture Earth-like life, scientists have said. Gliese 581d orbits on the outer fringes of the star’s ‘Goldilocks zone’, where it is not so hot that water boils away, nor so cold that water is perpetually frozen. Zarmina’s World “With a dense carbon dioxide atmosphere – a likely scenario on such a large planet – the climate of Gliese 581d is not only stable against collapse but warm enough to have oceans, clouds and rainfall,” France’s National Centre for Scientific Research (CNRS) said. with Cosmos Online
Scientists Discover The Oldest, Largest Body Of Water In Existence--In Space Scientists have found the biggest and oldest reservoir of water ever--so large and so old, it’s almost impossible to describe. The water is out in space, a place we used to think of as desolate and desert dry, but it's turning out to be pretty lush. Researchers found a lake of water so large that it could provide each person on Earth an entire planet’s worth of water--20,000 times over. Yes, so much water out there in space that it could supply each one of us all the water on Earth--Niagara Falls, the Pacific Ocean, the polar ice caps, the puddle in the bottom of the canoe you forgot to flip over--20,000 times over. The water is in a cloud around a huge black hole that is in the process of sucking in matter and spraying out energy (such an active black hole is called a quasar), and the waves of energy the black hole releases make water by literally knocking hydrogen and oxygen atoms together. The new cloud of water is enough to supply 28 galaxies with water.