Latest Gravitation Stories

Latest Student Science Heads For Space
2014-07-07 03:33:25

Melissa Gaskill, NASA Astronauts on future missions may nibble on lettuce and grow their own antibiotics, depending on the results of research that student scientists plan to conduct on the International Space Station. Mission 5 of the Student Spaceflight Experiments Program (SSEP) is scheduled to launch to the space station on July 11. A total of 1,344 proposals yielded 15 selected investigations for the flight. These investigations represent a diversity of subject matter from...

Fruit fly study shows Hypergravity may help mitigate biological problems in space
2014-07-01 03:55:42

[ Watch The Video: ScienceCasts: Fruit Flies On The International Space Station ] Laura Niles, NASA Before you swat away the next fruit fly, consider instead just how similar its biological complexities are to our own. In a study published in PLOS ONE, researchers led by Deborah Kimbrell, Ph.D., at the University of California, Davis (UC Davis) and their collaborators, studied how microorganisms may alter fruit flies’ immunity in space and in hypergravity, or increased gravity. The...

Researchers Detect Smallest Force Ever Measured
2014-06-27 03:21:50

By Lynn Yarris, Berkeley Lab What is believed to be the smallest force ever measured has been detected by researchers with the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley. Using a combination of lasers and a unique optical trapping system that provides a cloud of ultracold atoms, the researchers measured a force of approximately 42 yoctonewtons. A yoctonewton is one septillionth of a newton and there are approximately 3 x 1023...

Clumped Galaxies Give General Relativity Its Toughest Test Yet
2014-06-26 03:55:21

Royal Astronomical Society Nearly 100 years since Albert Einstein developed general relativity, the theory has passed its toughest test yet in explaining the properties of observable Universe. The most precise measurements to date of the strength of gravitational interactions between distant galaxies show perfect consistency with general relativity’s predictions. The results will be presented by Dr Lado Samushia at the National Astronomy Meeting 2014 in Portsmouth on Wednesday 25 June....

Trio Of Supermassive Black Holes Discovered In Distant Galaxy
2014-06-26 08:58:10

Brett Smith for redOrbit.com - Your Universe Online While many galaxies have a supermassive black hole at their core, a new study published in the journal Nature has revealed a truly exotic phenomenon – a galaxy more than four billion light years away with three orbiting supermassive black holes at its center. The study authors said their work indicates that there could be numerous other galaxies with two or more black holes at their center. “What remains extraordinary to me is...

2014-06-12 23:13:58

Engineer and author Dean Walker has done what many other notable scientists, including such greats as Newton and Einstein, were unable to do: mathematically prove the cause of gravity. Walker's latest work, Gravity Fields of Energy, explains why gravity only mimics an attractive force and proves the theory with relatively simple mathematics. Hyde Park, Vermont (PRWEB) June 12, 2014 Walker builds upon the works of Galileo, Newton, Einstein, and most recently the work of Joseph Taylor...

black hole gravity may be turbulent
2014-06-06 10:03:11

Brett Smith for redOrbit.com - Your Universe Online According to conventional wisdom among physicists, gravity cannot become turbulent. However, new research from the Perimeter Institute for Theoretical Physics has found that gravity can become turbulent, specifically around a black hole, because it behaves like a fluid. “There’s a conjecture in physics – the holographic conjecture – which says gravity can be described as a field theory,” said study author Luis Lehner, a...

2014-04-23 23:16:18

Retired physicist disproves Einstein’s theory of relativity. Leeds, UK (PRWEB) April 23, 2014 Einstein is regarded as a scientific genius, presented to school-age children as the preeminent scholar of everything scientific. Scientists however, have suspected Einstein’s theory of relativity is not quite right, for over a century. It now appears that a physicist has finally showed that Einstein's ether-less aspect of relativity is in error. In his new book "Unification of...

Astronomers Discover The Earliest Echoes Of The Big Bang
2014-03-17 13:23:58

Lee Rannals for redOrbit.com - Your Universe Online Astronomers publishing a paper in the journal Nature say they have found the first direct evidence that gravitational waves rippled through the early Universe during the inflation period. Scientists using the NASA-developed detector technology on the BICEP2 telescope at the South Pole found the strongest confirmation yet of cosmic inflation theories, which say the universe expanded by 100 trillion trillion times in less than the blink...

2014-03-06 08:20:37

DENVER, March 6, 2014 /PRNewswire-USNewswire/ -- Imagine a world where gravity modification engines on semiconductor chips, float and propel rockets, aircrafts, and helicopters by the year 2020. This revenue opportunity is estimated to be $30 billion. Imagine, interstellar journeys that take minutes if not seconds, a world with commercial traffic between the stars, across our Milky Way, and within our lifetimes by 2040. Xodus One Foundation [501(c) application filed] is the foremost...

Latest Gravitation Reference Libraries

General Relativity and Gravitation
2012-04-29 19:54:56

General Relativity and Gravitation is a peer-reviewed scientific journal published monthly since its establishment in 1970. It is published by Springer on behalf of the International Society on General Relativity and Gravitation. G.F.R. Ellis and H. Nicolai are the editors-in-chief. The journal covers modern gravitational physics, encompassing all theoretical and experimental aspects of general relativity and gravitation. The journal’s main goals include public outreach through teaching...

2004-10-19 04:45:44

Kepler's Laws of Planetary Motion -- The astronomer Johannes Kepler's main contribution to astronomy was his three laws of planetary motion. Kepler found these laws empirically by studying extensive observations recorded by Tycho Brahe. He found the first two laws in 1609 and the third one in 1618. Isaac Newton was later able to derive the laws from his laws of motion and gravity, thereby producing strong evidence in favor of Newton's inverse-square gravitational law. Kepler's First...

2004-10-19 04:45:41

Gravitational Lens -- A gravitational lens is formed when the light from a very distant, bright object (such as a quasar) is "bent" around a massive object (such as a massive galaxy) between the bright object and the viewer. The process is known as gravitational lensing, and was one of the predictions made by Einstein's general relativity. Description In a gravitational lens, the gravity from the massive object bends light as a lens might. As a result, the path of the light from a...

2004-10-19 04:45:41

General Relativity -- General Relativity is the common name for the theory of gravitation published by Albert Einstein in 1915. According to general relativity the force of gravity is a manifestation of the local geometry of spacetime. Although the modern theory is due to Einstein, its origins go back to the axioms of Euclidean geometry and the many attempts over the centuries to prove Euclid's fifth postulate, that parallel lines remain always equidistant, culminating with the...

2004-10-19 04:45:41

Escape Velocity -- An escape velocity is the minimum speed at which an object without propulsion can move away from a source of a gravitational field indefinitely if there is no friction. This definition may need modification for the practical problem of two or more sources in some cases. In any case, the object is assumed to be a point with a mass that is negligible compared with that of the source of the field, usually an excellent approximation. It is commonly described as the speed...

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Word of the Day
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'