- Old School Nouveau.
(posts are not mine unless stated.)
Dark Matter Maps
In the curent, revolutionary age of physics - dark matter is a theoretical, controversial substance which is causing a great deal of interest for modern scientists. The current theory is that dark matter accounts for up to three quarters of the universe’s mass. For the first time, this dark matter has been mapped - by detecting the ‘ripples’ that it causes in space and time. Dark matter is thought to act as a sort of glue, providing the gravity to hold galaxies together.
Scientists in Hawaii, using a 340 megapixel camera, studied approximately 10 million galaxies in four distinct regions of the sky - and measured the distortion of light from galaxies behind dark matter. The gravity from great deals of dark matter bends the light on its journey towards us. The result is a ‘map’ of dark matter, spanning billions of miles and billions of years.
Quart de cercle de Jonathan Sisson. Laiton, 1742. Classé monument historique. Dépôt de l’Université Claude-Bernard Lyon 1 (Observatoire astronomique de Saint-Genis-Laval). Employé par Jérôme de Lalande pour la première déterminiation précise de la distance Terre-Lune en 1751. Exposé au Musée gallo-romain de Fourvière, Lyon
Quarter of a circle used by Jérôme de Lalande to measure the distance between the earth and the moon in 1751.
Joseph Jérôme Lefrançois de Lalande (11 July 1732 – 4 April 1807) was a French astronomer and writer.
Numerous candidates have developed a pattern of embracing various antiscience positions from the denial of climate change to the assertion that stem cell research is “killing children,” in order to create controversy and reinvigorate sagging poll numbers. This is presumably based on the candidates’ belief that evangelical voters are antiscience.
This sort of brinksmanship with reason is not only dangerous for science - it is dangerous for democracy itself. The United States was founded on the principle that each individual could rationally ascertain the truth of things for him or herself, and therefore a government of, by and for the people would be more just and more effective than a government by the authoritarian edicts of a King or Pope. That means a government whose decisions are based on the best available evidence.
BEHOLD, ANOTHER SAGAN SERIES VIDEO
Sweet mother of God I have been waiting…
todo el mundo tiene que ver este video, y entenderlo.
Albert Einstein’s 1906 paper on special relativity was revolutionary for many reasons, it transformed our understanding of the universe. Besides infamous trains and clocks, the theory also brings up an interesting paradox, known as the twin paradox.
The twin paradox was one of Einstein’s famous “gedankenexperiments,” or thought experiments. As the theory states, time slows down for fast moving objects. The paradox states that if two twins were precisely the same age, and one went off on a journey in space in a high-speed rocket while the other stayed still on Earth - the traveling twin would return to find that he is much younger than his brother! Although is not a strict paradox in the logical sense, it is still a fascinating topic to contemplate.
According to a process called time dilation (given by the equation shown above), time is not a constant thing - and changes for a moving observer. One of the two postulates of special relativity is the constancy of the speed of light - that no matter what an observers speed, they will always see the speed of light at a constant 3 * 108 m/s. In order to compensate for this extra speed of the observer, the amount of time must go down for the observer in order to keep the speed constant.
Famous Physicists as Children
From left to right:
Stephen Hawking (b. 1942) - Most well known for Hawking radiation and theorems involving gravitational singularities. He suffers from ALS, also known as Lou Gehrig’s disease - and is one of the most well scientists of our time.
Neil deGrasse Tyson (b. 1958) - Currently the director of the Hayden Planetarium at the Rose Center for Earth and Space, Tyson is one of the leading science advocates in the world - and was one of the men who supported the demotion of Pluto.
Carl Sagan (1934-1996) - One of the most successful science popularizers of all time, Sagan was also the bestselling author of Cosmos, one of the most popular science books of all time. He was the first to propose that Jupiter’s moons Titan and Europa may hold liquid components of water on them.
Albert Einstein (1879-1955) - The most well known genius in history, Albert Einstein was a boss. During his career, he revolutionized almost every area of Physics, including quantum mechanics and he effectively founded the study of Cosmology. His theory of general relativity has been wildly successful, despite ‘attacks’ by neutrinos.
Richard Feynman (1918-1988) - His most important contributions came via his path integral formulation of quantum mechanics and development of Quantum Electrodynamics (QED). Plus, he was a total badass.