background preloader

Neil deGrasse Tyson - We Stopped Dreaming (Episode 1)

Neil deGrasse Tyson - We Stopped Dreaming (Episode 1)

Why Explore Space? . Specifically, she asked how he could suggest spending billions of dollars on such a project at a time when so many children were starving on Earth. Stuhlinger soon sent the following letter of explanation to Sister Jucunda, along with a copy of "Earthrise," the iconic photograph of Earth taken in 1968 by astronaut William Anders, from the Moon (also embedded in the transcript). His thoughtful reply was later published by NASA, and titled, "Why Explore Space?" May 6, 1970Dear Sister Mary Jucunda:Your letter was one of many which are reaching me every day, but it has touched me more deeply than all the others because it came so much from the depths of a searching mind and a compassionate heart. The photograph which I enclose with this letter shows a view of our Earth as seen from Apollo 8 when it orbited the moon at Christmas, 1968.

'Ghost Rider: Spirit of Vengeance' Trailer Looks Positively Badass I once attended a one man show/drinking game titled "Ghost Rider, My Favorite Movie." It reveled in how ridiculous Mark Steven Johnson's film was and by the time the credits rolled, it was clear everyone packed into that tiny comedy club had a really good time adhering to the drinking game's rules. Well, I don't think that performance will be getting a sequel show, because the trailer for Ghost Rider: Spirit of Vengeance looks like it used the bones of the first film to pick its teeth. Charlatan A charlatan (also called swindler or mountebank) is a person practicing quackery or some similar confidence trick in order to obtain money, fame or other advantages via some form of pretense or deception. The word comes from French charlatan, a seller of medicines who might advertise his presence with music and an outdoor stage show. The best known of the Parisian charlatans was Tabarin, who set up a stage in the Place Dauphine, Paris in 1618, and whose commedia dell'arte inspired skits and whose farces inspired Molière. The word can also be traced to Spanish; charlatán, an indiscreetly talkative person, a chatterbox. Ultimately, etymologists trace "charlatan" from either the Italian ciarlare, to prattle; or from Cerretano, a resident of Cerreto, a village in Umbria, known for its quacks.[1] Details[edit]

UV Color Changing Beads at Steve Spangler Science Great Product Review by Andrew I use these beads with my 1st graders to talk about sun safety. During the testing phase, we discovered that some of the beads started to turn a faint color under a lamp with a 100 watt bulb. I thought they only changed colors when exposed to UV light. (Posted on 3/24/14) Basics of Space Flight: Orbital Mechanics Orbital mechanics, also called flight mechanics, is the study of the motions of artificial satellites and space vehicles moving under the influence of forces such as gravity, atmospheric drag, thrust, etc. Orbital mechanics is a modern offshoot of celestial mechanics which is the study of the motions of natural celestial bodies such as the moon and planets. The root of orbital mechanics can be traced back to the 17th century when mathematician Isaac Newton (1642-1727) put forward his laws of motion and formulated his law of universal gravitation. The engineering applications of orbital mechanics include ascent trajectories, reentry and landing, rendezvous computations, and lunar and interplanetary trajectories.

Please, Watch This Insane LEGO Ninja Movie Lol just like in most anime. "The whole fence looks fine except that ooone section...hmmm...I'm not gonna walk by that." It's an issue with layers.... when you animate you draw different animated parts on different layers (that way you only have to animate that one section instead of the whole picture). These layers are drawn on clear see-through sheets. Image evolution What is this? A simulated annealing like optimization algorithm, a reimplementation of Roger Alsing's excellent idea. The goal is to get an image represented as a collection of overlapping polygons of various colors and transparencies. We start from random 50 polygons that are invisible. In each optimization step we randomly modify one parameter (like color components or polygon vertices) and check whether such new variant looks more like the original image. If it is, we keep it, and continue to mutate this one instead.

Geostationary orbit Geostationary orbits (top view). To an observer on the rotating Earth, both satellites appear stationary in the sky at their respective locations. Geostationary orbits (side view) This awesome motorized Tachikoma is looking for a home Have you ever dreamed of owning a Tachikoma? I have. In fact I love Tachikomas so much that I would go as far as to call them as one of my favorite mechs of all time. Recently, an amazingly crafty guy, working under the username Mahj, put together a fully-functioning Lego prototype of the adorable multi-legged combat vehicle. All it's missing it's thermoptic camouflage, explosives, and a couple of light machine guns.

Many-worlds interpretation The quantum-mechanical "Schrödinger's cat" paradox according to the many-worlds interpretation. In this interpretation, every event is a branch point; the cat is both alive and dead, even before the box is opened, but the "alive" and "dead" cats are in different branches of the universe, both of which are equally real, but which do not interact with each other.[1] The many-worlds interpretation is an interpretation of quantum mechanics that asserts the objective reality of the universal wavefunction and denies the actuality of wavefunction collapse. Many-worlds implies that all possible alternate histories and futures are real, each representing an actual "world" (or "universe"). In lay terms, the hypothesis states there is a very large—perhaps infinite[2]—number of universes, and everything that could possibly have happened in our past, but did not, has occurred in the past of some other universe or universes. Outline[edit]

Lagrange Points of the Earth-Moon System A mechanical system with three objects, say the Earth, Moon and Sun, constitutes a three-body problem. The three-body problem is famous in both mathematics and physics circles, and mathematicians in the 1950s finally managed an elegant proof that it is impossible to solve. However, approximate solutions can be very useful, particularly when the masses of the three objects differ greatly.

Forget 3D, I'm Ready To Play This 4D Video Game tl;dr version: This isn't a fourth dimension. Dimensions must be "uncountably infinite" in size, and this aint it. The problem with this approach to "4D" is that dimensions have to be something called "uncountably infinite" to be a true dimension. This technically isn't a fourth dimension (in fact, it would be a fifth dimension—time is a dimension). Think about it this way: Say that each world is a cube of however many units you want to measure in.