News tagged with expansion rate
Radio telescopes extend astronomy's best 'yardstick'
Jun 08, 2009 |
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Radio astronomers have directly measured the distance to a faraway galaxy, providing a valuable "yardstick" for calibrating large astronomical distances and demonstrating a vital method that could help determine the elusive ...
Search results for expansion rate
Galactic Colonization Limited By The Inability To Expand Exponentially
Jun 23, 2009 |
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(PhysOrg.com) -- For more than 50 years, many have taken the so-called Fermi Paradox to indicate that the existence of intelligent alien civilizations is an impossibility. However, a recent re-examination ...
Uganda forests rapidly disappearing: study
Jun 20, 2009 |
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Uganda has lost nearly a third of its forest cover since 1990 due to expanding farmlands, a rapidly growing human population and increased urbanisation, a government report said on Friday.
Refined Hubble Constant narrows explanations for dark energy
May 07, 2009 |
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Whatever dark energy is, explanations for it have less wiggle room following a Hubble Space Telescope observation that has refined the measurement of the universe's present expansion rate to a precision where ...
Dirty Space and Supernovae
Feb 28, 2008 |
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Interstellar space may be strewn with tiny whiskers of carbon, dimming the light of far-away objects. This discovery by scientists at the Carnegie Institution may have implications for the “dark energy” hypothesis, proposed ...
Hormone clue to root growth
Jul 06, 2009 |
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(PhysOrg.com) -- Plant roots provide the crops we eat with water, nutrients and anchorage. Understanding how roots grow and how hormones control that growth is crucial to improving crop yields, which will be necessary to ...
Macro, not micro: modified theories of gravity
Feb 16, 2007 |
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When it comes to cosmology, the macro scale is important. As scientists search for the reasons behind the increasing rate at which the universe is expanding, they modify Einstein’s theory of gravity and delve into dark energy ...
Sea level is rising along US Atlantic coast, say environmental scientists
Space & Earth / Earth Sciences
Dec 10, 2009 |
3.8 / 5 (12) |
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An international team of environmental scientists led by the University of Pennsylvania has shown that sea-level rise along the Atlantic Coast of the United States was 2 millimeters faster in the 20th century ...
Sea Level Is Rising Along U.S. Atlantic Coast, According to New Data Analysis
Space & Earth / Earth Sciences
Dec 03, 2009 |
3.7 / 5 (13) |
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(PhysOrg.com) -- An international team of environmental scientists led by the University of Pennsylvania has shown that sea-level rise along the Atlantic Coast of the United States was 2 millimeters faster in the 20th century ...
The day the universe froze: New dark energy model includes cosmological phase transition
May 08, 2009 |
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Imagine a time when the entire universe froze. According to a new model for dark energy, that is essentially what happened about 11.5 billion years ago, when the universe was a quarter of the size it is today.
Of yeast and men: Unraveling the molecular mechanisms of Friedreich's ataxia
Jul 09, 2009 |
4 / 5 (1) |
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Researchers in human genetics have long known that expansions of GAA repeats - resulting in this nucleotide triplet repeating hundreds or thousands of times - cause the most common hereditary neurological disorder known as ...
List of search results for expansion rate
