Latest Stellar astronomy Stories

Astronomers Find Huge 'Hot Core' Enveloping Infant Star
2013-10-04 13:31:43

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have discovered an infant star while looking at an infrared dark cloud that is about ten times larger than those found around typical solar-mass baby stars. A team using the ALMA Observatory was looking at infrared dark cloud G34.43+00.24 MM3 when it discovered the baby star. Hot molecular clouds around new-born stars are known as "Hot Cores" and have temperatures that are 100 degrees hotter than normal molecular clouds....

Hostile Weather Balloon At Heart Of Milky Way
2013-10-03 15:13:50

John P. Millis, PhD for redOrbit.com - Your Universe Online We live in relative safety, far away from immense explosions, extreme weather, and chaotic interactions. Of course, I speak of our little corner of the Milky Way, nearly two-thirds of the way out from the galactic center, nestled between two spiral arms. This relatively sparse section of the cosmos stands in stark contracts to the center of the galaxy, where star formation, supernovae and intense space-weather would make life as...

Shaping A Blooming Star
2013-09-27 10:36:32

[ Watch The Video: CSIRO’s Australia Telescope Compact Array ] John P. Millis, PhD for redOrbit.com - Your Universe Online Many objects in the Universe contain jets – intense magnetic fields twisted around their axes, ejecting plasma into the Cosmos. In general, however, these objects tend to be powerful, exotic entities such as black holes and neutron stars. Or, at the other end of the spectrum, forming stars – called proto-stars – can form such jet structures as well, but on...

Magnetic Jets Stars Final Transformation
2013-09-17 12:37:48

John P. Millis, PhD for redOrbit.com - Your Universe Online In general, main sequence stars die in one of two ways: high mass stars, those several times larger than our Sun, will explode in brilliant supernovae, leaving behind a shock remnant with a dense neutron star or black hole at its center. Lower mass stars like our Sun will transition into a planetary nebula. The outer envelope of the star is expressed into the interstellar medium, and the star’s gravity relinquishes its grip....

Milky Way In 3D
2013-09-13 11:09:37

John P. Millis, PhD for redOrbit.com - Your Universe Online Because of our location within the Milky Way, it is quite a challenge to get a bird’s eye view of our galaxy. To really get a sense for what our corner of the cosmos really looks like, astronomers have to take detailed measurements of billions of stars and attempt to accurately measure their distance from Earth. Researchers at the Max Planck Institute for Extraterrestrial Physics (MPE) have now created the most detailed model...

Mapping Location Of Galactic Clouds
2013-09-11 14:31:55

[ Watch the Video: Mapping Our Milky Way Galaxy ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers using the 22-meter Mopra Telescope in Coonabarabran, Australia have begun mapping the location where stars are born. In January, wildfires destroyed the telescope's adjoining workshop, office and accommodations, but Mopra's control room was spared because it was encased in brick. The team from the University of New South Wales (UNSW) wrote in the journal Publications of...

Black Hole Blows Powerful Streams
2013-09-06 08:51:29

April Flowers for redOrbit.com - Your Universe Online A worldwide network of radio telescopes has allowed astronomers to find strong evidence that a powerful jet of material, propelled to nearly light speed by the central black hole of a galaxy, is blowing massive amounts of gas out of the host galaxy. The scientists say the process is limiting the growth of the black hole and the rate of star formation in the galaxy. That makes the process a key to understanding how galaxies develop....

Hubble Views A Cosmic Caterpillar
2013-08-30 06:46:53

[ Watch The Video - Protostar IRAS 20324+4057 Zoom Sequence ] NASA/ESA Hubble Space Telescope This light-year-long knot of interstellar gas and dust resembles a caterpillar on its way to a feast. But the meat of the story is not only what this cosmic caterpillar eats for lunch, but also what's eating it. Harsh winds from extremely bright stars are blasting ultraviolet radiation at this "wanna-be" star and sculpting the gas and dust into its long shape. The culprits are 65 of the...

Twin Star Insights Into Sun's Future
2013-08-28 13:47:51

[ Watch the Video: The Life Cycle of a Sun-Like Star ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers have identified what they are calling the Sun's oldest twin, HIP 102152, sitting 250 light-years away from us. A team of astronomers using the European Southern Observatory's (ESO) Very Large Telescope (VLT) found that HIP 102152 is older but otherwise nearly identical to our Sun, giving astronomers a chance to see how our local star will look as it ages. Our Sun is...

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,...

Latest Stellar astronomy 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

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 04:45:42

Stellar Evolution -- Stellar evolution is the process of formation, life, and death of stars. It is one of the major topics of cosmogony. Star Birth and Life A star starts out as an enormous cloud of gas and dust many light-years across. Star formation begins when the cloud begins to condense under its own gravity. The processes that initiate this contraction are not fully understood. The cloud fragments fuse into stellar mass clouds known as protostars. Protostars do not emit...

2004-10-19 04:45:42

Star Formation -- Star formation is the process by which gas in molecular clouds gets transformed into stars. In the current paradigm of star formation, cores of molecular clouds (regions of specially high density) became gravitationally unstable, and start to concentrate. Part of the gravitational energy lost in the process is radiated in the infrared, another part increases the temperature of the core. The accretion of material happen partially though a circumstellar disc. When...

2004-10-19 04:45:42

Star Designation -- The International Astronomical Union (IAU) is the internationally recognised authority for assigning designations to stars (and other celestial bodies). Many of the star names in use today were inherited from the time before the IAU existed. Other names, mainly for variable stars (including novae and supernovae), are being added all the time. Most stars, however, have no name and are referred to, if at all, by means of catalogue numbers. This article briefly...

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Word of the Day
  • To stammer.
  • Present participle of maffle, to stammer.
  • A simpleton.
The word 'maffle' may come from a Dutch word meaning 'to move the jaws' or a French word meaning 'having large cheeks'.