Space submarines will allow us to explore the seas of icy moons One of the most profound and exciting breakthroughs in planetary science in the last two decades has been the discovery of liquid methane lakes on the surface of Saturn’s largest moon Titan, and liquid oceans under the icy surfaces of many of the giant gas planets’ other moons. Thrillingly, these some of these “waters” may actually harbour life. Unfortunately, we don’t know much about them. Probes such as Juno and Cassini can only get so close.
Physics Flash Animations We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window. The animations are sorted by category, and the file size of each animation is included in the listing. Also included is the minimum version of the Flash player that is required; the player is available free from The categories are: Brief Answers to Cosmic Questions Structure of the Universe Does the Universe have an edge, beyond which there is nothing? Are the galaxies arranged on the surface of a sphere? Why can't we see the whole universe? Does the term "universe" refer to space, or to the matter in it, or to both? Evolution of the Universe Did the Universe expand from a point?
Beyond 2012: Why the World Won't End Beyond 2012: Why the World Didn't End If you're reading this story, it means the world didn't end on Dec. 21, 2012. Despite reports of an ancient Maya prophecy, a mysterious planet on a collision course with Earth, or a reverse in Earth's rotation, we're still here.
Astrophysics: Fire in the hole! Andy Potts In March 2012, Joseph Polchinski began to contemplate suicide — at least in mathematical form. A string theorist at the Kavli Institute for Theoretical Physics in Santa Barbara, California, Polchinski was pondering what would happen to an astronaut who dived into a black hole.
Thank You, Houston: Unsung Heroes Star in New 'Mission Control' Doc A riveting new documentary about NASA's journey to the moon pays tribute to the many behind-the-scenes heroes of the Apollo program. "Mission Control: The Unsung Heroes of Apollo," which hits movie theaters today (April 14), tells the story of the men whose strenuous work put the first astronauts on the moon and launched a new era of human spaceflight. Along with plenty of archival NASA videos and photos, the documentary features several of the original flight-control staff who worked in the Manned Spacecraft Center (later renamed the Christopher C. Kraft Jr. Mission Control Center) at the Johnson Space Center in Houston during the 1960s and 1970s. Unlike the stars of the movie "Hidden Figures," the "unsung" figures in this documentary are all Caucasian men.
Electronics Demonstrations BasicsA/C CircuitsPassive FiltersOther Passive CircuitsDiodesOp-AmpsMOSFETsTransistors (Bipolar)Combinational LogicSequential Logic555 Timer ChipTransmission LinesMemristorsTunnel DiodesSpark Gaps New Station Flight Control Room New Station Flight Control Room + High resolution photo (1.5 Mb) + Low resolution photo (59 Kb) JSC2006-E-43842 (6 Oct. 2006)--- Astronaut Julie Payette, spacecraft communicator (CAPCOM), and John McCullough, flight director, support the Expedition 14 mission. International Space Station flight controllers have this area as their new home with increased technical capabilities, more workspace and a long, distinguished history. The newly updated facility is just down the hall from its predecessor at NASA's Johnson Space Center, Houston.
Ice-capades: The true blue beauty of the icebergs of Iceland By Sara Malm Published: 16:56 GMT, 12 November 2012 | Updated: 20:17 GMT, 12 November 2012 It has been called the nation of fire and ice and as these stunning pictures proves, it is certainly the latter. The magnificent ever-changing landscapes of Iceland where the freezing temperatures make the icebergs and glaciers shift in every shade of blue, from turquoise and azure to indigo. Big Peanut-Shaped Asteroid Caught on Radar as It Zooms by Earth (Video) An asteroid that zoomed by Earth today (April 19) at less than five times the distance between the Earth and the moon has been caught on radar. The new images, which were taken yesterday (April 18), capture features on the near-Earth asteroid 2014 JO25 as small as 25 feet (7.5 meters) across, scientists said. The photos — which were combined to make this video of asteroid 2014 JO25 — reveal that the space rock rotates once every 5 hours and has a peanut-like structure, with the larger of the two lobes about 2,000 feet (620 m) wide.
Phasor Diagrams Phasor Diagrams In AC electrical theory every power source supplies a voltage that is either a sine wave of one particular frequency or can be considered as a sum of sine waves of differing frequencies. The neat thing about a sine wave such as V(t) = Asin(ωt + δ) is that it can be considered to be directly related to a vector of length A revolving in a circle with angular velocity ω - in fact just the y component of the vector. The phase constant δ is the starting angle at t = 0. In Figure 1, an animated GIF shows this relation [you may need to click on the image for it to animate]. Since a pen and paper drawing cannot be animated so easily, a 2D drawing of a rotating vector shows the vector inscribed in the centre of a circle as indicated in Figure 2 below.