Cosmos, in general, relates to the structure and nature of the universe, and the nature of “the universe” relates to human systems of seeing, our ways of thinking and perception, and what can be seen, literally and figuratively, by humans in general. It is not only about the cosmos, it is about who we are and where we are going as a species.
Space travel looks fascinating however, it affects the health of a person or Astronauts both Mentally and Physically. Let’s look at some of the Major Health problems in Space Cardiovascular Deconditioning Microgravity exposure degrades the cardiovascular system’s general condition (heart and blood vessels) and specifically degrades orthostatic tolerance (the ability of the cardiovascular system to …
Galileo Galilei was born in Pisa on February 15, 1564. The little that, through some letters, is known of his mother, Giulia Ammannati di Pescia, does not make her an overly flattering figure. His father, Vincenzo Galilei, was a Florentine and came from a family that had long been illustrious; A musician by vocation, economic …
Galileo Galilei- Biography, Facts, Discoveries & Telescopes Read More »
In giant detectors that are capable of reconstructing what happened during collisions, and all this in a very high collision rate environment, the events (an event is a collision with all of its resulting particles) are studied. They can be compared to extremely large three-dimensional digital cameras that can take 40 million “sequences” per second …
The great challenges of today’s science require infrastructures and monstrous investments, among which are the Large Hadron Collider (LHC) – the particle accelerator that started on 10 Sept 2008, the most powerful in the world -, the Pierre Auger Observatory – the largest cosmic ray detector of the moment-, the Cassini Huygens probe – the …
About 130 million years ago, in a galaxy far, far away, emitting gravitational waves, two neutron stars collided. LIGO employees have been waiting for such an event since the launch of an improved version of the interferometer in 2015. A hundred years later, after Einstein suggested the existence of gravitational waves, we saw them, traced …
There’s a lot of compelling evidence for the Big Bang, but what preceded it? The most accepted model is called Inflation, but it’s not the kind of inflation that Alan Greenspan needs to fear. Physicists define the boundaries of physics by trying to describe them theoretically and then testing that description against observation. Our observed …
Why can’t we just build an accelerator to test the predictions of string theory? Because the obstacles are much bigger than money or social commitment. This section uses units where (Planck’s constant)/2p and the speed of light = 1. This choice of units is called natural units. With this choice, mass has units of inverse …
Here’s a nice loophole: not all of the predictions from string theory take place at the unreachable Planck scale. Supersymmetry could give us a window on the Planck scale using currently available technology. One troubling aspect of spontaneously broken gauge field theories based on the Higgs mechanism of giving mass to gauge bosons is that …
The Special theory of Relativity (shortly, Special or Restricted Relativity, RE), first published by Albert Einstein in 1905, describes the physics of motion in the absence of gravitational fields. Before it, most physicists believed that Isaac Newton’s classical mechanics, based on the so-called relativity of Galileo (origin of the mathematical equations known as Galileo transformations), …
Introduction to Cosmology Cosmology is the study of the origin, evolution, and structure of the universe. This science grew out of simple observations and evolved along with mathematical theories, technological advances and space exploration. Below is an attempt to describe the universe by one Arthur Dent (i.e., someone certified scientifically declined in space matters). Okay…the …
What is Cosmology? Cosmology Definition, Terms, Facts & Theories Read More »