Latest Star Stories

Fluffy Disk Baby Star
2013-08-27 09:17:10

John P. Millis, PhD for redOrbit.com - Your Universe Online Astronomers from the Strategic Exploration of Exoplanets and Disks with Subaru Telescope (SEEDS) project, an effort to search out other worlds, has turned its attention to a somewhat unusual source. Using the Subaru Telescope’s High Contrast Instrument for the Subaru Next Generation Adaptive Optics (HiCIAO), scientists were interested in a young star known as Ry Tau (Tauri) located some 460 light-years from Earth. Around this...

Measuring Stellar Gravity
2013-08-23 08:58:22

[ Watch The Video: Star Flickering Discovery ] John P. Millis, PhD for redOrbit.com - Your Universe Online A star’s gravitational strength is key in understanding and modeling other properties of a particular star, to say nothing of understanding the planets that orbit around it. But making accurate measurements of a star’s surface gravity is difficult, and measurements are often only good to within about a 50% estimation of the actual value, sometimes worse. Now, however,...

Sharpest Photos Ever of the Night Sky
2013-08-22 04:43:24

redOrbit Staff & Wire Reports - Your Universe Online Astronomers from the University of Arizona, the Arcetri Observatory in Italy and the Carnegie Observatory have used a new type of telescope camera to capture the highest-resolution images of the night sky ever – answering some longstanding questions about planetary formation in the process. The technology, which has been in development at Arizona observatories for over two decades, was recently deployed in the high desert of...

Zombie-Like Vortex Gives Final Push To Birth New Star
2013-08-21 14:06:17

Brett Smith for redOrbit.com - Your Universe Online For years, most astronomers have agreed on the basic steps that lead to star formation, except one – how a cloud of swirling gas can slow down enough to concentrate into something capable of nuclear fusion. A new study from the University of California, Berkeley has found evidence of “zombie vortices” within a gestating star leading to a final push that gives birth to a new star. According to prevailing theories, stars begin...

Nova Visible With Naked Eye
2013-08-20 10:36:11

John P. Millis, PhD for redOrbit.com - Your Universe Online White dwarfs – small balls of carbon and oxygen, the core remnants of Sun-like stars that reached the ends of their lives – give off a soft glow of light, slowly fading as the heat from their surfaces escapes into the coldness of space. These dead cores will eventually dim and cool, as nuclear fusion has long ceased. However, there are some that live on. These white dwarfs orbit in close binary systems with another star. If...

ALMA Pics Dramatic Star Birth
2013-08-20 09:15:05

Lee Rannals for redOrbit.com - Your Universe Online Astronomers say they have obtained a close-up view of material streaming away from a newborn star. Using the Atacama Large Millimeter/submillimeter Array (ALMA) telescope, a team of scientists was able to discover the jets coming off an object called Herbig-Haro 46/47 are even more energetic than previously believed. The new images also reveal a previously unknown jet pointing in an entirely different direction. The new images reveal...

Cosmic Turbulence Black Hole Formation
2013-08-16 09:31:01

John P. Millis, PhD for redOrbit.com - Your Universe Online The mechanism by which stars and black holes are formed in extreme cases of high mass density has puzzled astronomers since Johannes Kepler first laid out his laws of planetary motion some 400 years ago. In the most basic sense, a large cloud of gas condenses into a rotating disk. Mass is then directed towards the center of the cloud where, due to the increasing density, a stellar body is eventually formed. One challenge to...

How Fast Does A Supernova Shockwave Travel? A Japan Team May Have The Answer
2013-08-13 14:51:55

Brett Smith for redOrbit.com - Your Universe Online Some of the most spectacular explosions this side of the Big Bang, supernovae generate unthinkable amounts of force and energy and new research from Keio University in Japan has measured the expansion velocity of a supernova shockwave for the first time. The shockwave measured by the research team was from the supernova remnant W44, which is located approximately 10,000 light years from Earth. Quantifying the expansion and kinetic...

Heavy Metal Stars
2013-08-01 14:00:20

Lee Rannals for redOrbit.com - Your Universe Online Astronomers from the Armagh Observatory in Northern Ireland say they have discovered two unusual, heavy metal stars. The team wrote in the journal Monthly Notices of the Royal Astronomical Society that they found the stars HE 2359-2844 and HE 1256-2738 to contain extremely high concentrations of lead in their atmospheres. Naslim Neelamkodan, Simon Jeffery, Natalie Behara and Alan Hibbert said these two stars have surfaces containing...

Latest Star Reference Libraries

Stellar Astrophysics
2014-01-12 00:00:00

The prominent feature that allows for the existence of life on Earth is the Sun. Radiation from our closest star provides heat and energy to our planet, driving biological processes and providing the necessary conditions for liquid water to naturally exist. But our Sun is only but one star in this vast Universe. And as it turns out, most stars are quite different than the one that illuminates our day. For this reason, scientists have, for hundreds of years, attempted to study the other...

2004-10-19 04:45:43

UV Astronomy -- UV astronomy is the branch of astronomy and astrophysics which deals with objects visible in ultraviolet (UV) radiation. UV radiation ranges approximatively from 10nm (extreme UV) to 380nm (near UV). Ultraviolet line spectrum measurements are used to discern the chemical composition, densities, and temperatures of interstellar medium, and the temperature and composition of hot young stars. UV observations can also provide essential information about the evolution of...

2004-10-19 04:45:43

Hertzsprung-Russell Diagram -- In stellar astronomy, the Hertzsprung-Russell diagram (H-R diagram) shows the relation between the absolute magnitude and the spectral types of stars. It was invented around 1910 by Ejnar Hertzsprung and Henry Norris Russell. There are two equivalent forms. One is the observer's form which plots the color of the star on one axis and the absolute magnitude on the other axis. The theoretician's form plots the temperature of the star on one axis and the...

2004-10-19 04:45:43

X-ray Burster -- X-ray bursters are a class of binary stars which are luminous in X-rays. They contain a neutron star and a low-mass companion star. The companion fills its Roche lobe and therefore the neutron star is accreting matter from it. The inflowing gas forms an accretion disk around the neutron star. Sometimes X-ray bursters show a sudden increase in their X-ray luminosity, called X-ray burst. All properties of the X-ray bursts can be explained assuming that they result from...

2004-10-19 04:45:43

Variable Star -- Most stars are of nearly constant luminosity. Our own Sun is a good example which goes through practically no measurable variation in brightness. There are, however, stars which do vary in brightness, called variable stars. They fall into two main groups: Intrinsic variables These are stars which have intrinsic variations in brightness, that is the star itself gets brighter and dimmer. There are many types of intrinsic variables, the main types being: -- Mira...

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Word of the Day
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'