Physics & Astronomy News
Scientists have discovered a novel particle acceleration mechanism called ‘micro-bubble implosion’
New insights into solar flares' explosive energy releases were released by the Owens Valley Solar Array (EOVSA)
Experiments that measure the lifetime of neutrons reveal a perplexing and unresolved discrepancy.
Scientists have created a tiny chemistry lab for a rover that will drill beneath the Martian surface looking for signs of past or present life.
Scientist create new models of Tidal Disruption Events - rare, but extremely forceful events taking place in the center of galaxies.
Experimental results from the XENON1T dark matter detector limit the effective size of dark matter particles to 4.1X10-47 square centimeters.
Researchers have succeeded in separating the two forms of water to show that they can exhibit different chemical reactivities.
Science Facts
Groups & Clusters of Galaxies
by Chandra X-Ray Observatory Center and ScienceIQ.com
Galaxy clusters are the largest gravitationally bound objects in the universe. They have three major components: (i) hundreds of galaxies containing stars, gas and dust; (ii) vast clouds of hot (30 - 100 million degrees Celsius) gas that is invisible to optical telescopes; and (iii) dark matter, a mysterious form of matter that has so far escaped direct detection with any type of telescope, but makes its presence felt through its gravitational pull on the galaxies and hot gas.The hot gas envelops the galaxies and fills the space between galaxies. It contains more mass than all the galaxies in the cluster. Although the galaxies and hot gas clouds are very massive, scientists have determined that about 10 times more mass is needed to hold the cluster together. Something, namely dark matter must exist to provide the additional gravity.
Astronomers think that galaxy clusters form as clumps of dark matter and their associated galaxies are pulled together by gravity to form groups of dozens of galaxies, which in turn merge to form clusters of hundreds, and even thousands of galaxies. The gas in galaxy clusters is heated as the cluster is formed. This heating can be a violent process as gas clouds enveloping groups of galaxies collide and merge to become a cluster over billions of years.
Stopping In Thin Air
Imagine you're going very fast -- much faster than a race car. In fact, imagine you're going 100 or 200 times faster than a race car. When you reach your destination, you need to stop relatively quick ...
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Nuclides & Isotopes
An atom that has an unbalanced ratio of neutrons to protons in the nucleus seeks to become more stable. The unbalanced or unstable atom tries to become more stable by changing the number of neutrons a ...
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Exploring The 'Red Planet'
The planet Mars, sometimes called the 'Red Planet', has been an object of study for many centuries. The distinctive reddish color of the planet led some cultures to associate Mars with bloodshed and w ...
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