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Latest Metallicity Stories

Wide-field view of the Andromeda Galaxy
2012-06-02 08:41:25

Unfortunately, stars don't have birth certificates. So, astronomers have a tough time figuring out their ages. Knowing a star's age is critical for understanding how our Milky Way galaxy built itself up over billions of years from smaller galaxies. Jason Kalirai of the Space Telescope Science Institute and The Johns Hopkins University's Center for Astrophysical Sciences, both in Baltimore, Md., has found the next best thing to a star's birth certificate. Using a new technique, Kalirai...

Baby Galaxies Grew Up Faster Than Previously Believed
2012-05-18 03:53:28

[ Watch the Video ] Baby galaxies from the young Universe more than 12 billion years ago evolved faster than previously thought, shows new research from the Niels Bohr Institute. This means that already in the early history of the Universe, there was potential for planet formation and life. The research results have been published in the scientific journal, Monthly Notices of the Royal Astronomical Society Letters. For several thousand years after the Big Bang 13.7 billion years ago,...

Birth Environment Affects Star Formation
2012-05-12 04:34:32

Researchers working at the University of Bonn in Germany have used computer simulations to discover the first evidence that the way in which stars form depends upon the conditions of their birth environments, claims a new study published in the journal Monthly Notices of the Royal Astronomical Society. In a Friday statement, the Society said that the properties of stars, which are believed to form in interstellar space from gas and dust clouds, are dependent upon the surrounding conditions...

Image 1 - Astronomers Find Hypervelocity Stars Ejected From The Galactic Core
2012-05-01 02:53:18

It´s very difficult to kick a star out of the galaxy. In fact, the primary mechanism that astronomers have come up with that can give a star the two-million-plus mile-per-hour kick it takes requires a close encounter with the supermassive black hole at the galaxy´s core. So far astronomers have found 16 of these “hypervelocity” stars. Although they are traveling fast enough to eventually escape the galaxy´s gravitational grasp, they have been discovered while...

2011-12-22 04:35:47

Low in the south in the summer sky shines the constellation Scorpius and the bright, red supergiant star Antares. Many of the brightest stars in Scorpius, and hundreds of its fainter stars, are among the youngest stars found near the earth, and a new analysis of them may result in a rethinking of both their ages and the ages of other groups of stars. New research by astrophysicists from the University of Rochester focused on stars in the north part of the constellation, known as Upper...

In The Dragonfish's Mouth
2011-12-01 05:28:44

The next generation of superstars to stir up our galaxy Three astronomers at the University of Toronto have found the most numerous batch of young, supermassive stars yet observed in our galaxy: hundreds of thousands of stars, including several hundreds of the most massive kind --blue stars dozens of times heavier than our Sun. The light these newborn stars emit is so intense it has pushed out and heated the gas that gave them birth, carving out a glowing hollow shell about a hundred...

Hungry Milky Way Devours Galaxies
2011-11-30 04:28:48

The Milky Way galaxy continues to devour its small neighboring dwarf galaxies and the evidence is spread out across the sky. A team of astronomers led by Sergey Koposov and Vasily Belokurov of Cambridge University recently discovered two streams of stars in the Southern Galactic hemisphere that were torn off the Sagittarius dwarf galaxy. This discovery came from analyzing data from the latest Sloan Digital Sky Survey (SDSS-III) and was announced in a paper released today that connects...

Very First Stars Were Not Monstrous
2011-11-11 04:26:06

The very first stars in our universe were not the behemoths scientists had once thought, according to new simulations performed at NASA's Jet Propulsion Laboratory, Pasadena, Calif. Astronomers "grew" stars in their computers, mimicking the conditions of our primordial universe. The simulations took weeks. When the scientists' concoctions were finally done, they were shocked by the results -- the full-grown stars were much smaller than expected. Until now, it was widely believed that...

Astronomers Find Clouds Of Primordial Gas From The Early Universe
2011-11-11 04:10:18

For the first time, astronomers have found pristine clouds of the primordial gas that formed in the first few minutes after the Big Bang. The composition of the gas matches theoretical predictions, providing direct evidence in support of the modern cosmological explanation for the origins of elements in the universe. Only the lightest elements, mostly hydrogen and helium, were created in the Big Bang. Then a few hundred million years passed before clumps of this primordial gas condensed to...


Word of the Day
vermicular
  • Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
  • Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
  • Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
  • A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.
This word ultimately comes from the Latin 'vermis,' worm.
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