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]
posted by zarq
on Apr 18, 2013 -
... and there is no dark matter/energy!
Dr. Philip Mannheim
has succeeded in developing a cosmological and quantum field theoretic consistent PT symmetric theory that contains no kind of dark matter and dark energy.
Space is flat in the absence of matter, and even the largest galactic rotation curves are predicted. Perhaps most interestingly, it also handles the cosmological constant and zero-point energy 'problems' simultaneously! (This is the final paper in a long list of publications
, but it makes the case such that it's importance is immediately recognized. I leave it to the experts to recognize it's true beauty.) All hail the internets!
posted by quanta and qualia
on Apr 21, 2011 -
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
posted by Fizz
on Jan 15, 2011 -
Physicist Erik Verlinde proposed in a recent paper
that the force of gravity can be derived from the principles of thermodynamics. NY Times explains
. [Physicist Lee] Smolin called it, “very interesting and also very incomplete.”
posted by jjray
on Jul 12, 2010 -
Gravity from Quantum Information At the heart of their idea is the tricky question of what happens to information when it enters a black hole. Physicists have puzzled over this for decades with little consensus. But one thing they agree on is Landauer's principle: that erasing a bit of quantum information always increases the entropy of the Universe by a certain small amount and requires a specific amount of energy.
posted by kliuless
on Apr 1, 2010 -
Friday Flash Fun: Green Moon Lab!
Manipulate gravity and momentum to get to the exit in this sleek, simple, Portal
-esque physics puzzler. Contains twenty levels plus an unlockable challenge mode. A little weak in the writing department, but the drunken swooping gameplay more than makes up for it. (via
posted by Rhaomi
on Mar 13, 2009 -
[Friday Flash Fun] Gravity Pods
, a physics-based shooter/puzzle where you use special gravity pods and repellers to alter the course of a projectile and avoid barriers to hit a target.
posted by aerotive
on Jul 27, 2007 -
An experiment recently performed
by the AET RaDAL group shows that the gravitomagnetic field produced by a rapidly-spinning superconductor can cause a 1.117 times increase over the Earth's gravity.
, a phenomenon predicted by General Relativity, is a poorly understood but promising topic in modern physics. Speculation about harnessing the bizarre, space-warping and gravity-altering effects of gravitomagnetism has already begun. Reactionless space propulsion [PDF]
is the most apparent use (previously discussed
), with the potential applications far-reaching and nearly inconcievable. The earlier experiment by the European Space Agency
involving another rapidly-spinning superconductor earlier this year found a massive increase in strength over the predicted values, but still miniscule by our standards. Things could become very interesting if the results from this latest experiment pan out.
posted by nervestaple
on Aug 15, 2006 -
Before the Big Bang
out of my depth, but I thought this comment was intriguing: "The paper as published, along with a longer follow up paper, looks to my untrained eye a nearly complete quantum gravitation theory, which is an exciting prospect in itself. However, as with all physical theories, we will await for experimental support before popping the cork." Here's some more on loop quantum gravity
, spin networks
, the big bang
posted by kliuless
on Apr 16, 2006 -