News tagged with white dwarfs
Related topics: astronomers , stars , universe , dark energy , neutron stars
Variability of type 1a supernovae has implications for dark energy studies
(PhysOrg.com) -- The stellar explosions known as type 1a supernovae have long been used as "standard candles," their uniform brightness giving astronomers a way to measure cosmic distances and the expansion ...
Aug 12, 2009 |
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Pulsating White Dwarfs Explained by 'Accidental Astronomer'
(PhysOrg.com) -- Exploring distant parts of the galaxy, astrophysicist Denis Sullivan has collaborated on the discovery of about six extrasolar planets--not bad for an accidental astronomer.
Space & Earth / Space Exploration
Jul 28, 2009 |
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Peculiar, junior-sized supernova discovered by New York teen
In November 2008, Caroline Moore, a 14-year-old student from upstate New York, discovered a supernova in a nearby galaxy, making her the youngest person ever to do so. Additional observations determined that the object, called ...
Jun 11, 2009 |
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Supernova remnant is an unusual suspect
A new image from NASA's Chandra X-ray Observatory shows a supernova remnant with a different look. This object, known as SNR 0104-72.3 (SNR 0104 for short), is in the Small Magellanic Cloud, a small neighboring ...
Jun 09, 2009 |
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Queen's astronomers propose new supernova interpretation
In a controversial new paper in the journal Nature, astronomers from Queen's University Belfast have proposed a new physical interpretation of a supernova discovered on 7th November 2008.
Jun 09, 2009 |
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World's observatories watching 'cool' star
The Whole Earth Telescope (WET), a worldwide network of observatories coordinated by the University of Delaware, is synchronizing its lenses to provide round-the-clock coverage of a cooling star. As the star ...
May 15, 2009 |
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Galactic X-ray emissions originate from stars
(PhysOrg.com) -- A 25-year old astronomical mystery has been solved: Most of the diffuse X-ray emissions in the Milky Way do not originate from one single source but from so-called white dwarfs and from stars ...
May 05, 2009 |
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Understanding stellar explosions is less straightforward than previously thought
(PhysOrg.com) -- Stellar explosions called novæ are caused by nuclear reactions between the star's atoms. In order to better understand such violent phenomena, astrophysicists study the radiation emitted by certain types ...
Apr 30, 2009 |
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Oddball stars discovered in new Hubble images
(PhysOrg.com) -- Professor Adrienne Cool has discovered 24 unusual stars in an ancient star cluster in the Milky Way. Made of helium rather than the usual carbon and oxygen, these white dwarf stars appear ...
Apr 27, 2009 |
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Largest collection of anomalous white dwarfs observed by Hubble
Twenty-four unusual stars, 18 of them newly discovered, have been observed in new Hubble telescope images. The stars are white dwarfs, a common type of dead star, but they are odd because they are made of ...
Apr 23, 2009 |
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Solar systems around dead Suns?
(PhysOrg.com) -- Using NASA’s Spitzer Space Telescope, an international team of astronomers have found that at least 1 in 100 white dwarf stars show evidence of orbiting asteroids and rocky planets, suggesting ...
Apr 20, 2009 |
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HARPS-NEF to comb Kepler targets for new Earths
Astronomers have announced plans to build an ultra-stable, high-precision spectrograph for the Science and Technology Facilities Council's 4.2-m William Herschel Telescope (WHT - part of the Isaac Newton Group ...
Apr 20, 2009 |
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Into the eye of the helix
(PhysOrg.com) -- The Helix Nebula, NGC 7293, lies about 700 light-years away in the constellation of Aquarius (the Water Bearer). It is one of the closest and most spectacular examples of a planetary nebula.
Feb 25, 2009 |
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Dead Stars Tell Story of Planet Birth
(PhysOrg.com) -- Astronomers have turned to an unexpected place to study the evolution of planets -- dead stars. Observations made with NASA's Spitzer Space Telescope reveal six dead "white dwarf" stars littered ...
Jan 05, 2009 |
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