Galaxy Clusters Current Events | Galaxy Clusters News | 8
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Study sheds new light on early star formation in the universe
A groundbreaking study has provided new insight into the way the first stars were formed at the start of the Universe, some 13 billion years ago. view more (2007-09-14)
Ultrafast star escapes black hole
Galactic nuclei are the cores of galaxies, groups of thousands to millions of stars that are held together by gravity. As stars in the nucleus are so close together, interactions readily occur. view more (2006-10-05)
Immigrant Sun: Our star could be far from where it started in Milky Way
A long-standing scientific belief holds that stars tend to hang out in the same general part of a galaxy where they originally formed. Some astrophysicists have recently questioned whether that is true, and now new simulations show that, at least in galaxies similar to our own Milky Way, stars such as the sun can migrate great distances. view more (2008-09-16)
Brookhaven lab scientists stabilize platinum electrocatalysts for use in fuel cells
Platinum is the most efficient electrocatalyst for accelerating chemical reactions in fuel cells for electric vehicles. In reactions during the stop-and-go driving of an electric car, however, the platinum dissolves, which reduces its efficiency as a catalyst. This is a major impediment for vehicle-application of fuel cells. view more (2007-01-15)
Gold in the realm of dwarves
"Man has been fascinated by gold since ancient times," says a bland introduction to related scientific studies. The fact that there is still room for surprises was shown by a recent publication: Nanoparticles of the precious metal behave differently from those of its close relatives. view more (2004-10-25)
Astronomers search for orphan stars using newly upgraded telescope
Using new charge coupled device (CCD) instrumentation, Case Western Reserve University astronomers can now view the night sky wider and deeper than before. view more (2008-05-20)
New analysis puts dark matter back into elliptical galaxies
According to the prevailing "cold dark matter" theory of the evolution of the universe, every galaxy is surrounded by a halo of dark matter that can only be detected indirectly by observing its gravitational effects. view more (2005-09-29)
Largest collection of anomalous white dwarfs observed in new Hubble images
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 helium rather than the usual carbon and oxygen. This is the first extensive sequence of helium-core white dwarfs to be observed in a globular... view more... (2009-04-23)
Is the Sagittarius dwarf galaxy a debris of the Large Magellanic Cloud?
The Sagittarius dwarf galaxy is our nearest neighbor. Yet it has been discovered only recently, in 1994, being hidden by the stars and dust in our own Galaxy, the Milky Way. It is however possible today to better know this companion galaxy, thanks to variable stars, the RR Lyrae, in which Sgr-dw is particularly rich. In a recent paper, Patrick... view more... (2002-02-25)
The Purple Rose of Virgo
ntil now NGC 5584 was just one galaxy among many others, located to the West of the Virgo Cluster. Known only as a number in galaxy surveys, its sheer beauty is now revealed in all its glory in a new VLT image. Since 1 March, this purple cosmic rose also holds the brightest stellar explosion of the year, known as SN 2007af. view more (2007-03-28)
First Image and Spectrum of a Dark Matter Object
Astronomers have observed a Dark Matter object directly for the first time. Images and spectra of a MACHO microlens - a nearby dwarf star that gravitationally focuses light from a star in another galaxy - were taken by the NASA/ESA Hubble Space Telescope and the European Southern Observatory's Very Large Telescope. The Riddle of Dark Matter The... view more... (2001-12-05)
A simple survey yields a cosmic conundrum
A survey of galaxies observed along the sightlines to quasars and gamma-ray bursts-both extremely luminous, distant objects-has revealed a puzzling inconsistency. Galaxies appear to be four times more common in the direction of gamma-ray bursts than in the direction of quasars. view more (2006-08-01)
Nanocomposite labeled cancer cells can be targeted and destroyed using lasers
A nanocomposite particle can be constructed so that it has a mix of properties that would not otherwise happen in nature. By combining an organic matrix with metallic clusters that can absorb light, it is possible to incorporate such particles into cells and then destroy those targeted cells with a laser. view more (2007-05-21)
In Tarantula Territory
Famous Southern Nebula Imaged from La Silla view more (2002-06-10)
South African Large Telescope (SALT) Makes Its Debut
Rutgers, The State University of New Jersey, today joined 10 partners worldwide to release the first full-color astronomical images made by the Southern African Large Telescope (SALT) in South Africa. view more (2005-09-02)
Starburst galaxy sheds light on longstanding cosmic mystery
An international collaboration that includes scientists from the University of Delaware's Bartol Research Institute in the Department of Physics and Astronomy has discovered very-high-energy gamma rays in the Cigar Galaxy (M82), a bright galaxy filled with exploding stars 12 million light years from Earth. view more (2009-11-03)
The Virgo Cluster of Galaxies in the Making
An international team of astronomers [1] has succeeded in measuring with high precision the velocities of a large number of planetary nebulae [2] in the intergalactic space within the Virgo Cluster of galaxies. For this they used the highly efficient FLAMES spectrograph [3] on the ESO Very Large Telescope at the Paranal Observatory (Chile). view more (2004-10-29)
New study questions dark matter in galaxies and clusters of galaxies
A new paper examines galaxy rotation curves without exotic dark matter and seeks to describe a modified Newtonian acceleration law derived from a relativistic modification of Einstein's gravitational theory. view more (2006-01-20)
Galaxy collisions dominate the local universe
More than half of the largest galaxies in the nearby universe have collided and merged with another galaxy in the past two billion years, according to a Yale astronomer in a study using hundreds of images from two of the deepest sky surveys ever conducted. view more (2005-12-06)
From galaxy collisions to star birth: ISO finds the missing link
Data from ISO, the infrared observatory of the European Space Agency (ESA), have provided the first direct evidence that shock waves generated by galaxy collisions excite the gas from which new stars will form. The result also provides important clues on how the birth of the first stars was triggered and speeded up in the early Universe. By... view more... (2005-03-29)
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