So far, the only direct evidence we have for the existence of dark matter is through gravity-based effects on the matter we can see.
And these gravitational effects are so pronounced that we know it must make up about 85 percent of all matter in…
Category: 4. Physics
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Holographic cosmological model and thermodynamics on the horizon of the universe
The expansion of the Universe has occupied the minds of astronomers and astrophysicists for decades.
Among the cosmological models that have been suggested over the years, Lambda cold dark matter (LCDM) models are the simplest models that can…
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BU astrophysicist and collaborators reveal a new model of our heliosphere
The heliosphere is a vast region, extending more than twice as far as Pluto. It casts a magnetic “force field” around all the planets, deflecting charged particles that would otherwise muscle into the solar system and even tear through…
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What is an electron? | ScienceBlogs
As surprising as it may sound, no one really knows what an electron is, and it is this fundamental question that has been the driving force for much of modern physics and eventually led to the development of quantum field theory.
To answer the…
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Ask Ethan: Why Did Light Arrive 1.7 Seconds After Gravitational Waves In The Neutron Star Merger?
“Delay is the deadliest form of denial.” -C. Northcote Parkinson
Every massless particle and wave travels at the speed of light when it moves through a vacuum. Over a distance of 130 million light years, the gamma rays and gravitational waves…
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Five Discoveries In Fundamental Physics That Came As Total Surprises
“On what can we now place our hopes of solving the many riddles which still exist as to the origin and composition of cosmic rays?” –Victor Francis Hess
It’s often said that advanced in physics aren’t met with “eureka!” but rather…
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Merging Neutron Stars Deliver Deathblow To Dark Matter And Dark Energy Alternatives
“Dark matter is interesting. Basically, the Universe is heavier than it should be. There’s whole swathes of stuff we can’t account for.” -Talulah Riley
One of the most puzzling facts about the Universe is that 95% of the energy in it, in the…
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Ask Ethan: How sure are we that the Universe is 13.8 billion years old?
“Normal science, the activity in which most scientists inevitably spend almost all their time, is predicated on the assumption that the scientific community knows what the world is like.” -Thomas S. Kuhn
For all of human history, the biggest…
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Seeing One Example Of Merging Neutron Stars Raises Five Incredible Questions
“O. Hahn and F. Strassmann have discovered a new type of nuclear reaction, the splitting into two smaller nuclei of the nuclei of uranium and thorium under neutron bombardment. Thus they demonstrated the production of nuclei of barium, lanthanum,…
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Why don’t we have artificial gravity in space?
“Designing a station with artificial gravity would undoubtedly be a daunting task. Space agencies would have to re-examine many reliable technologies under the light of the new forces these tools would have to endure. Space flight would have to…
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