Gravitational pull between two objects
Newton s Theory of Gravity states that every object in the universe pulls on every other object. Every object feels this force, so it is a universal force. The force is always attractive; it is always a pull, never a push. Picture the force of gravity as the tension in an imaginary rope between two objects…
What is a Higgs particle?
What is a Higgs Particle? Asked by: Jon Lorello Answer The Higgs particle is as yet a hypothetical particle invoked to explain why the carriers of the electroweak force (the W and Z bosons) have mass. Quantum electrodynamics requires the photon to have zero mass (which is good because indeed it does)…
There is no gravity
Each galaxy is held together by strong gravitational forces. Even if you managed to get away from our sun, you would still experience the galaxy s gravity. This image is an artisitic rendition of our galaxy. Public Domain Image, source: Christopher S. Baird. There is gravity in space – lots of it. Gravity…
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Dark matter Physics
Galaxies in our universe seem to be achieving an impossible feat. They are rotating with such speed that the gravity generated by their observable matter could not possibly hold them together; they should have torn themselves apart long ago. The same is true of galaxies in clusters, which leads scientists…
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Higgs Supersymmetry
This track is an example of simulated data modelled for the ATLAS detector on the Large Hadron Collider (LHC) at CERN. The Higgs boson is produced in the collision of two protons at 14 TeV and quickly decays into four muons, a type of heavy electron that is not absorbed by the detector. The tracks of…
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Four laws of physics
Question: What are the Fundamental Forces of Physics? Sometimes there are references to the four fundamental forces of physics. What are the fundamental forces? Why are they fundamental? Answer: The fundamental forces (or fundamental interactions) of physics are the ways that individual particles interact with each other. It turns out that for every single interaction that…
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Dark energy (Astronomy)
On the road: AAS January 2013 meeting — supernovae and dark energy
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Dark matter Articles
The visible universe—including Earth, the sun, other stars, and galaxies—is made of protons, neutrons, and electrons bundled together into atoms. Perhaps one of the most surprising discoveries of the 20th century was that this ordinary, or baryonic, matter makes up less than 5 percent of the mass of the universe. The rest of the universe appears to be made of a mysterious…
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