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Latest Variable star Stories

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...

Stellar Collision Survivor New Type Pulsating Star
2013-06-28 14:54:18

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have discovered that the brightness of the remnant of a stellar collision can vary in a way that scientists have not observed before. The team wrote in the journal Nature that these observations will allow astronomers to learn what happens when stars collide in binary systems. Stars like our Sun expand to become red giant stars when the hydrogen that fuels the nuclear fusion in their cores runs out. Binary stars will...

Astronomers Identify New Type Of Variable Star
2013-06-12 05:07:07

[ Watch the Videos: The Star Cluster NGC 3766 | Zooming in on the Star Cluster NGC 3766 ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers writing in the journal Astronomy & Astrophysics say they have discovered a new type of variable star. The Swiss astronomers discovered the new class of variable stars by measuring minute variations in stellar brightness. The new results are based on regular measurements of the brightness of more than three thousand stars in the...

2012-05-18 06:55:59

The study of the 'demon star,' Algol, made by a research group of the University of Helsinki, Finland, has received both scientific and public attention The study of the "Demon star", Algol, made by a research group of the University of Helsinki, Finland, has received both scientific and public attention. The period of the brightness variation of this eclipsing binary star has been connected to good prognoses three millennia ago. This result has raised a lot of discussion and the news has...

Image 1 - Astronomers Release Unprecedented Data Set On Celestial Objects That Brighten And Dim
2012-01-13 04:53:21

Astronomers from the California Institute of Technology (Caltech) and the University of Arizona have released the largest data set ever collected that documents the brightening and dimming of stars and other celestial objects–two hundred million in total. The night sky is filled with objects like asteroids that dash across the sky and others–like exploding stars and variable stars–that flash, dim, and brighten. Studying such phenomena can help astronomers better...

In A Star's Final Days, Astronomers Hunt 'Signal Of Impending Doom'
2011-12-01 04:40:55

An otherwise nondescript binary star system in the Whirlpool Galaxy has brought astronomers tantalizingly close to their goal of observing a star just before it goes supernova. The study, submitted in a paper to the Astrophysical Journal, provides the latest result from an Ohio State University galaxy survey underway with the Large Binocular Telescope, located in Arizona. In the first survey of its kind, the researchers have been scanning 25 nearby galaxies for stars that brighten and...

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2011-04-19 06:05:00

Researchers have discovered 122 new eclipsing binary stars and observed hundreds more variable stars in an innovative survey using NASA's two STEREO solar satellites. The survey has been carried out by team from the Open University, University of Central Lancashire and the STFC Rutherford Appleton Laboratory. Dr Danielle Bewsher will present highlights at the RAS National Astronomy Meeting in Llandudno, Wales on Tuesday 19th April. STEREO was launched in 2006 to study the Sun in 3D and...

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2011-01-13 10:34:54

Astronomers have turned up the first direct proof that "standard candles" used to illuminate the size of the universe, termed Cepheids, shrink in mass, making them not quite as standard as once thought. The findings, made with NASA's Spitzer Space Telescope, will help astronomers make even more precise measurements of the size, age and expansion rate of our universe. Standard candles are astronomical objects that make up the rungs of the so-called cosmic distance ladder, a tool for measuring...

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2011-01-10 13:30:00

A deep survey of more than 200,000 stars in our Milky Way galaxy has unveiled the sometimes petulant behavior of tiny red dwarf stars. These stars, which are smaller than the Sun, can unleash powerful eruptions called flares that may release the energy of more than 100 million atomic bombs. Red dwarfs are the most abundant stars in our universe and are presumably hosts to numerous planets. However, their erratic behavior could make life unpleasant, if not impossible, for many alien worlds....


Latest Variable star Reference Libraries

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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
mundungus
  • A stinking tobacco.
  • Offal; waste animal product; organic matter unfit for consumption.
This word comes from the Spanish 'mondongo,' tripe, entrails.