stars

A star is a massive, luminous sphere of plasma held together by gravity. The nearest star to Earth is the Sun, which is the source of most of the energy on the planet. Some other stars are visible from Earth during the night when they are not obscured by atmospheric phenomena, appearing as a multitude of fixed luminous points because of their immense distance. Historically, the most prominent stars on the celestial sphere were grouped together into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.

For more information about stars check the Wikipedia article here

ZME Science posts about stars

Youngest ‘baby star’ ever discovered

Thu, Dec 6, 2012

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Astronomers have come across something truly amazing. Observations have surprised a protostar – a star in the making – in its earliest stage ever witnessed. The stellar fetus has only accreted about 20 percent of the matter surrounding it and has yet to begin nuclear fusion. Theories regarding star formation are rather well established, however [...]

Seeing stars during daytime – is it possible?

Thu, Nov 29, 2012

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The short answer is, no. Not with the naked eye at least, but if you use a highly potent set of binoculars or a telescope, this is indeed possible. There are a number of accounts, some dating back from ancient times, that tell of how star gazing is possible during the daytime. Various old wives’ tales speak [...]

Most powerful stars are actually vampire binary systems. The weaker feeds on the stronger

Fri, Jul 27, 2012

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A new research has found that the massively powerful O-type stars, which can be up to 90 times more powerful than our own sun, actually come in pairs most of the time, as a binary system. The two stars wrapper in this dance have a special kind of relationship developed with one another. Thus, one [...]

Stars spew out organic matter into space – life may have its origin in star dust

Thu, Oct 27, 2011

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A new study published by researchers at University of Hong Kong has produced controversial waves among the astronomy community, as it claims, backed by sound evidence, that organic matter can be created naturally by stars and travel through out the universe via interstellar dust. It’s somewhat hard to believe, even picture, how organic matter can [...]

How many planets are in the Milky Way? Over 50 billion

Mon, Feb 21, 2011

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Yes, you’ve read that right. There are over 50 billion planets in our galaxy alone, according to the Kepler telescope, scientists now estimate that not only there are over 500 bilion planets in the galaxy, but that there are over 500 million life-cable planets out there as well. These numbers obviously come from Nasa’s own [...]

A star is born [great pics]

Fri, Feb 11, 2011

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The nebula you are looking at is known as the North American nebula, and the pictures were taken with the Spitzer telescope, using an infrared vision; researchers still have some unanswered questions about the group of massive stars thought to be dominating the nebula. The lower left of this first image shows the “baby” stars [...]

Physicists create a supernova in a jar

Sat, Dec 4, 2010

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A supernova is a stellar explosion of cosmic proportions, that often can outshine the entire galaxy it is located in, before fading away in a matter of weeks or months. During this short period however, supernovae emit as much energy as the Sun emits during its entire life span – it’s the same kind of [...]

Universe could hold three times more stars than previously believed

Thu, Dec 2, 2010

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A new study suggests that a blunder of cosmic proportions has been made when estimating the total number of stars in the universe; the research points out that a specific kind of galaxy has 10 times more red dwarf stars than previously estimated. This would not only triple the number of stars throughout the universe, [...]

Amazing NASA pic shows how galaxies collide

Fri, Aug 6, 2010

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I gotta say, this is one of the most beautiful pictures I’ve seen all year ! This amazing image released by NASA shows a collision betweet two galaxies that began 100 million years ago (when dinosaurs were still kings) and is still happening today. The bright sources you see are in fact produced by huge [...]

Amazing Hubble capture of the NGC 3603 nebula

Tue, Jul 6, 2010

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The above photo was captured by the Hubble Space Telescope around mid last year, proving excellent practice for Hubble’s newly installed Wide Field Camera 3. Captioned is the by now famous  NGC 3603 nebula, located in the Carina spiral arm – it’s by far one of the most spectacular star forming regions in the Milky [...]

Dark flow leads researchers to exotic conclusion

Thu, Mar 25, 2010

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Two years ago, researchers reported the strange movement of hundreds of galaxy clusters moving in the same direction at about 3.6 million kilometers per hour. Current spatial movement models can’t explain this in any way, so at the time, they launched a strange hypothesis: clusters are being tugged by the gravity of something outside our [...]

Strange sky spiral freaks out Norway

Wed, Dec 9, 2009

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It was Thursday night when locals from Norway started to notice a strange, rotating light that just baffled them. It was visible long enough to be seen, photographed and recorded by half of country. The blue light seemed to appear from behind the top of a mountain; it rose, began to spin, then began to [...]

We now know the birth place of the biggest guitar in the galaxy

Tue, Nov 24, 2009

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In case you’re wondering, the biggest ‘guitar’ in our galaxy is in fact a pulsar that was nicknamed The Guitar Pulsar. It’s basically a stellar corpse that emits a beam of electromagnetic radiation that just shreds interstellar gas, creating a wake of hot hydrogen shaped just like a guitar. Little is known about these remnants, [...]

Stellar ‘cannibalism’ is the key to giant stars

Thu, Jan 15, 2009

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You may or may not have heard about blue stragglers; they are blue stars that are hotter and bluer than other stars with the same luminosity. Until now, it seemed that these stars defied most if not all of the standard stellar theories, but scientists now believe they have finally solved this stellar mistery. The [...]

Nasa discovers a dozen pulsars that change understanding about dying stars

Thu, Jan 8, 2009

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Recently, NASA’s Fermi Gamma-ray Space Telescope discovered no more, no less than 12 pulsars, and it also detected gamma ray pulse from 18 others. These findings are forcing scientists to rethink what we know about dying stars, as they totally underestimated the power of these stellar cilinders. “We know of 1,800 pulsars, but until Fermi [...]

Mirror mirror on the wall, who’s the brightest star of all?

Wed, Jul 16, 2008

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Actually, it’s not about the brightest star of all, but the brightest star in our galaxy. It seems there’s a new contender for the title of Milky Way brightest star; it’s near its dusty center, and infrared observations performed by NASA have revealed how bright it is by piercing the dust that surrounds it. The [...]

Astronomers Discover Stars With Carbon Atmospheres

Thu, Nov 22, 2007

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We have another piece of evidence which goes to show that we fail to understand numerous things about our universe. Astronomers have discovered white dwarf stars with pure carbon atmospheres. It is something that probably nobody would have believed. The exact way these stars evolved is still pretty much a mystery for astrophysicists. They believe [...]

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