NASA's long awaited paper, Measurement of Impulsive Thrust from a Closed Radio-Frequency Cavity in Vacuum, has passed peer review and been published in the American Institute of Aeronautics and Astronautics (AIAA)’s Journal of Propulsion and Power. The takeaway? They consistently measured 1.2 millinewtons per kilowatt of thrust in a vacuum with no apparent reaction mass. Several potential sources of error were considered and examined. If the results are replicated and not the result of error our current understanding of physics would be shattered. [more inside]
Mission Juno Tonight, Earth species Homo sapiens sapiens, with ongoing support from photosynthesizing relatives in the Plant kingdom, will attempt the delicate task of inserting a large machine into polar orbit around the highly radioactive gas giant Jupiter. After using a slingshot maneuver around Earth and Jupiter's tremendous gravitational pull to become "one of the fastest human-made objects ever built," it is hoped Juno will collect data for 20 months, shedding light on the composition of the planet and what it can tell us about the origin of the Sol system 4.6 billion years ago. [more inside]
Explore the deepest mysteries at the frontier of fundamental physics, and the most promising ideas put forth to solve them. A map of the frontier of fundamental physics built by interactive developer Emily Fuhrman.
“In 1999, two Canadian astrophysicists, Stéphane Dumas and Yvan Dutil, composed and sent a message into space. The message was composed of twenty-three pages of bitmapped data, and was sent from the RT-70 radio telescope in Yevpatoria, Ukraine, as part of a set of messages called Cosmic Call.” [more inside]
A Black Hole Mystery Wrapped in a Firewall Paradox - "A paradox around matter leaking from black holes puts into question various scientific axioms: Either information can be lost; Einstein's principle of equivalence is wrong; or quantum field theory needs fixing." [more inside]
Last fall, the Canadian Space Agency asked students to design a simple science experiment that could be performed in space, using items already available aboard the International Space Station. Today, Commander Chris Hadfield conducted the winner for its designers: two tenth grade students, Kendra Lemke and Meredith Faulkner, in a live feed to their school in Fall River, Nova Scotia. And now, we finally have an answer to the age-old question, What Happens When You Wring Out A Washcloth In Space? [more inside]
Is Science Fiction promoting pseuodoscience? Is it not really better than fantasy? Is it exhausted and dying, per Paul Kincaid (part 1, part 2), a sort of genre-writing version of completing a list of The Nine Billion Names of God? Does physics-bothering unrepentant space case Alistair Reynolds have a compass pointing the way forwards?
The physics of how cats flip their bodies to land feet first also allows spacecraft to turn. Flipping cats [previously] is interesting. It's even more interesting if your dad works at NASA and you have access to people who use flipping-cat physics to make spacecraft turn in space.
Science off the Sphere is a video series by Don Pettit aboard the ISS showing off the neat things you can do in zero-gravity. [more inside]
The Royal Observatory, Greenwich has put together the fantastic short video Measuring the Universe which briefly describes the different techniques used to allow us to calculate the vast distances to stellar objects in space. [via]
What is the Dzhanibekov effect? Known as the Tennis Racket theorem in English and documented by Vladimir Dzhanibekov in 1985 space, it is the result of unstable rotation about a principle axis.
Is the Earth getting lighter? BBC Radio's More or Less ("the mathematical icing on the cake of life") talks to some of the Naked Scientists from Cambridge about whether the Earth is gaining or losing mass, revealing some surprising and interesting facts.
Brian Greene's Fabric of the Cosmos is online in its entirety on NOVA's website, in four one-hour episodes. Time, Space, Quantum Mechanics, Multiverses.
One of my favorite blogs happens to be local to me. Eric Berger, the Houston Chronicle's "SciGuy" usually reports on the weather. But he also posts entertaining and serious stuff as well. [more inside]
The concept of time as a way to measure the duration of events is not only deeply intuitive, it also plays an important role in our mathematical descriptions of physical systems. For instance, we define an object’s speed as its displacement per a given time. But some researchers theorize that this Newtonian idea of time as an absolute quantity that flows on its own, along with the idea that time is the fourth dimension of spacetime, are incorrect. They propose to replace these concepts of time with a view that corresponds more accurately to the physical world: time as a measure of the numerical order of change.
"The Earth tide is a little-known daily event, similar to the oceans' more familiar tides. But the sun and moon's gravity doesn’t just pull on water, it deforms the Earth itself, causing the ground beneath us to bulge toward the pulling heavenly body." [more inside]
Weightless Cats and other fun experiments. An excerpt from from coverage of research at the Aerospace Medical Division Hq 657Oth Aerospace Medical Research Laboratories including scenes of F-104 seat ejection; drop tests from C-130 and ejection from F-106; effects of weightlessness on cats and pigeons in a C-131; test subjects in water tank, on centrifuge, in heat chamber and on complex coordinator. Also, scenes of vertical deceleration tower, incline impact test facility, vertical accelerator, equilibrium chair and vibration platform. More videos can be found at Airboyd.tv: Accident Animations, Aviation Films, Military Flight Training Films, and Space Shuttle Vidoes.
Yarchive is one man's collection of UseNET posts on the topics of Air Conditioning; Aircraft; Bicycles; Cars; Chemistry; Computers; Electrical, Electronic; Environment; Explosives, Pyrotechnics; Food; Houses; Guns; Jokes; Medicine; Metalworking; Military; Nuclear; Telephones; Physics; Risks; Security; Space mostly from a select group of authors. It has been updated several times since it first appeared here in 2001 and it never fails to sucker me in for hours every time I stumble upon it from a Google Search. [more inside]
On Truth and Reality. Despite several thousand years of failure to correctly understand physical reality (hence the current postmodern view that this is impossible) it is actually very simple to work out how matter exists and moves about in Space. The rules of Science (Occam's Razor / Simplicity) and Metaphysics (Dynamic Unity of Reality) require that reality be described from only one single source existing, as Leibniz wrote: "because of the interconnection of all things with one another." [more inside]
Science Hack is a unique search engine for science videos focusing on Physics, Chemistry, and Space. For example, things to do with sulfur hexafluoride. Still growing, the editors are presently indexing other scientific fields of study including Geology, Psychology, Robotics and Computers. Ever wonder why things go bang?
An Interactive Space Simulator "Smash planets together, introduce rogue stars, and build new worlds from spinning discs of debris. Fire a moon into a planet or destroy everything you've created with a super massive black hole. You can simulate and interact with our solar system: the 8 planets,160+ moons, and hundereds of asteroids, the nearest 1000 stars to our Sun, and our local group of galaxies." [31Mb, Windows only, sorry, but see inside for similar Mac and Linux apps] [more inside]
Imagining the Tenth Dimension (Flash). 10th dimensional physics and string theory don't get any easier than this.
Science sites of all kinds for kids. Archeology. Entomology. Natural Symphony. Baseball in Space. Philosophy. Process or Content. Science songs. Physics songs, relativity. String theory. Science and Art.
Hyperdrive and a possible Unified Theory. New Scientist article about a paper and proposal to NASA outlining development parameters and possiblities for a faster-than-light anti-gravity propulsion system, based on some rather interesting physics theories originated by a guy named Heim. You mean you've never heard of the Millenium Falcon? (via)
"I was willing to bet that there was going to be a universe, and I hit the nail on the head." The other day we had Avram Davidson, which got me thinking of Calvino's Invisible Cities, but all the recent talk about black holes made me remember that Italo Calvino is at his most charming when he's playing with physics, math, and cosmology in Cosmicomics.
A computer aided simulation builds a spiral galaxy from its beginning. In all, 390,000 particles were placed in an arrangement similar to a newborn galaxy. The end result after three months is an event that is believed to take billions of years to occur. (animation)