Almost 100 years since Albert Einstein established general relativity, the theory has delivered its hardest test yet in clarifying the properties of visible Universe. Contradicting fresh cosmological assumption that gravity "is an illusion", the most exact measurements to date of the power of gravitational contacts between distant galaxies display faultless reliability with general relativity’s guesses. Samushia and his coworkers studied more than 600,000 galaxies using the Sloan Digital Sky Survey III (SDSS-III) Baryon Oscillations Spectroscopic Survey (BOSS) directory to come about with a measurement of how much galaxies bundle together inside the huge volume that they inhabit. By means of the detected bends in galaxy locations, the group was able to measure the strength of gravity with exactness of 6 per cent, the strongest check of its kind as yet. The measurements turned out to be flawlessly reliable with the guesses of Einstein’s general relativity theory. More than 600 000 galaxies from the BOSS survey were used to measure the strength of gravitational contacts of galaxies tremendously far away from each other. This is a graphical illustration of that measurement; the quantity that the circles are distorted, or dense from perfect concentric rings, specifies the velocity that galaxies are dropping towards one another and therefore the strength of the gravitational contacts. The Big Bang theory works fine in the logic that it gives us some knowlwdge of how specific elements in our universe came about and there are other things that we can witness, like the radiation that initiated from the Big Bang. But the entire indication of an expanding universe that initiated with a big explosion will change. In January 2010, Erik Verlinde, professor ofTheoretical Physics and well-known string theorist, initiated a worldwide stir with the journal of On the Origin of Gravity and the Laws of Newton, in which he tested normally held insights on gravity, going so far as to state ‘for me gravity doesn’t exist’. If he is evidenced precise, the concerns for our understanding of the universe and its geneses in a Big Bang will be far-reaching.
Astronomers have probed deeper than before into a planetary system 130 light-years from Earth. The observations mark the first results of a new exoplanet survey called LEECH (LBT Exozodi Exoplanet Common Hunt), and are published today in the journal Astronomy and Astrophysics.
Neutron Stars are so bizarre that we can hardly wrap our heads around the knowledge of their existence. Actually, we still don't surely know most things about them, so all we can do is only guess and wonder trying to describe their great properties. The video below describes everything we know about them.
Communication security and metrology could be enhanced through a study of the role of quantum correlations in the distinguishability of physical processes, by researchers at the Universities of Strathclyde and Waterloo.
As manager of the Rosetta mission, Fred Jansen was responsible for the successful 2014 landing of a probe on the comet known as 67P/Churyumov-Gerasimenko. In this fascinating and funny talk, Jansen reveals some of the intricate calculations that went into landing the Philae probe on a comet 500 million kilometers from Earth -- and shares some incredible photographs taken along the way.
In 2004, astronomers examining a map of the radiation leftover from the Big Bang (the cosmic microwave background, or CMB) discovered the Cold Spot, a larger-than-expected unusually cold area of the sky. The physics surrounding the Big Bang theory predicts warmer and cooler spots of various sizes in ...
(Video: CERN) The LHC is preparing to restart at almost double the collision energy of its previous run. The new energy will allow physicists to check previously untestable theories, and explore new frontiers in particle physics.
Quantum mechanics is often described as 'weird' and 'strange' because it abandons many of the intuitive traits of classical physics. For example, the ideas that the world is objective, is deterministic, and exists independent of measurement are basic features of classical theory, but do not always hold ...
For the first time, astronomers have caught a multiple-star system in the beginning stages of its formation, and their direct observations of this process give strong support to one of several suggested pathways to producing such systems.
Some people hypothesise that what we call the universe may only be one of many. Is there any conceivable way that we could ever detect and study other universes if they exist? Is it even falsifiable? This was a key question the world's leading expert on the physics of the Universe was was asked in an interview with the BBC. "Our best bet for a theory of everything is M-theory --an extension of string theory," Hawking continued. "One prediction of M-theory is that there are many different universes, with different values for the physical constants. This might explain why the physical constants we measure seem fine-tuned to the values required for life to exist." It is no surprise that we observe the physical constants to be finely-tuned. If they weren't, we wouldn't be here to observe them. One way of testing the theory that we may be one of many universes would be to look for features in the cosmic microwave background radiation (CMB) which would indicate the collision of another universe with ours in the distant past.
As you may have heard, here in about 5 billion years, the Milky Way won’t exist as a singular entity anymore. Rather, as we speak, the Andromeda Galaxy — the Milky Way’s largest neighbor, which currently lurks more than 1,500,000 light-years away from Earth — is slowly inching its way toward us, and the two will eventually become […]
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