background preloader

To Scale: The Solar System

To Scale: The Solar System

http://www.youtube.com/watch?v=zR3Igc3Rhfg

Related:  h07katkarScience, bitchSystème solaireastrosystème solaire

Solar System, Solar System Information, Facts, News, Photos Our Cosmic Neighborhood From our small world we have gazed upon the cosmic ocean for thousands of years. Ancient astronomers observed points of light that appeared to move among the stars. How Accurate Is The Martian? 9 Things The Movie Got Right And Wrong "The Martian" is hitting cinemas right about now, and already it is being heralded as one of the most scientifically accurate sci-fi films of all time. We’ve seen the movie, and we’ve got to say, it’s amazing how far we’ve come since "Armageddon" (shudder). NASA has been so impressed, they've been using the movie as a marketing campaign for their own, actual manned missions to Mars in the 2030s. Based on the book of the same name by Andy Weir, itself praised for its accuracy, director Ridley Scott asked NASA to check the film and ensure everything in it was correct – or as correct as can be. But just how did they do? Here we pick through the science in the movie, with the help of a few experts, to see if "The Martian" is deserving of its accolades.

Astronomers might have finally detected where mysterious, extragalactic neutrinos are coming from Just over three years ago, physicists working in Antarctica announced they'd detected the first evidence of mysterious subatomic particles, known as neutrinos, coming from outside our galaxy. It was a huge moment for astrophysics, but since then, no one's quite been able to figure out where those particles are coming from, and what's sending them hurtling our way. Until now, that is - a team of astronomers has just identified the possible source of one these extragalactic visitors, and it appears that it started its journey to us nearly 10 billion years ago, when a massive explosion erupted in a galaxy far, far away (seriously, George Lucas couldn't make this stuff up). Let's step back for a second here though and explain why this is a big deal. Neutrinos are arguably the weirdest of the fundamental subatomic particles.

"Autumn Star And Planets : And Why The Stars Change With The A personalized PBS video experience is only a few clicks away. Use one of the services below to sign-in to PBS, and you'll be able to manage videos in your Watchlist, keep track of your favorite shows, watch PBS in high definition, and much more! You've just tried to add this video to your Watchlist so you can watch it later. Inflatable, 20km tall 'space elevator' could replace rockets A Canada-based space company has patented an inflatable "space elevator" designed to propel astronauts up into the stratosphere before they blast off into space. If the maverick "ThothX Tower" were ever actually built, it would soar 20km (12.4 miles) into the sky, and would reduce the cost of space launches by 30 percent in fuel costs alone, according to estimations. It's even hoped that the lift could replace some kinds of satellites. Thoth Technology's Brendan Quine, who invented the prototype, explained: "Astronauts would ascend to 12 miles by electrical elevator.

What's Up in Space: Comet Catalina previews a bright future Scott Sutherland Meteorologist/Science Writer Wednesday, August 19, 2015, 3:02 PM - A celestial wanderer gives us a preview of a potentially bright future, a violent origin for one of Saturn's rings and The Martian visits NASA's Jet Propulsion Laboratory. It's What's Up In Space! Comet Catalina glows green A first-time visitor to the solar system is getting closer to its one-and-only swing by the inner planets, and even though it's still farther away from the Sun than the planet Mars, it is already showing up beautifully in telescopes.

Mysterious blue flashes in space and upside-down lightning have been caught on film Strange footage captured by Danish astronaut Andreas Mogensen while on board the International Space Station has revealed unexplained blue 'blobs', and extensive flashes of light piercing the dark expanse of space, while new images of bizarre upside-down lightning have been captured from the ground. Presented at the European Geosciences Union meeting in Vienna last week, the incredible shots showcase the dynamic light show that occurs above a thunderstorm on Earth - elements of which no one has ever seen before. Filmed from the cupola window of the International Space Station in 2015 during violent thunderstorms over India, Mexico, Thailand, and Costa Rica, the footage features rare columns of electrical discharge called blue jets that can fan up and out as far as 12 kilometres. "That electrical imbalance is released in skyward high-energising bursts that ionise nitrogen to produce a blue glow: a blue jet," she says. Indian Institute of Geomagnetism

Astronomy OLogy Photos: The first Moon Walk, Buzz Aldrin: courtesy of NASA, taken by Neil A. Armstrong, Apollo 11; Earth forming: courtesy of JSC and NASA, Apollo 17; The Sun forming: courtesy of EIT Consortium/NSSDC and NASA, SOHO's EIT EIT Asteroids flying, Ida and it's moon Dactyl: courtesy of NSSDC and NASA; Galileo Sun's nuclear energy: courtesy of EIT Consortium/NSSDC and NASA, SOHO's EIT; Colliding galaxies: courtesy of The Hubble Heritage Team/STScI/AURA and NASA, Hubble Space Telescope Center, Debra Meloy Elmegreen, Bruce C. Elmegreen, Michele Kaufman, Elias Brinks, Curt Struck, Magnus Thomasson, Maria Sundin, and Mario Klaric; Black Holes: Accretion Disk Binary System: STScI and NASA; The Center of Centaurus, E.J.

FLI - Future of Life Institute Autonomous weapons select and engage targets without human intervention. They might include, for example, armed quadcopters that can search for and eliminate people meeting certain pre-defined criteria, but do not include cruise missiles or remotely piloted drones for which humans make all targeting decisions. Artificial Intelligence (AI) technology has reached a point where the deployment of such systems is — practically if not legally — feasible within years, not decades, and the stakes are high: autonomous weapons have been described as the third revolution in warfare, after gunpowder and nuclear arms. Many arguments have been made for and against autonomous weapons, for example that replacing human soldiers by machines is good by reducing casualties for the owner but bad by thereby lowering the threshold for going to battle. The key question for humanity today is whether to start a global AI arms race or to prevent it from starting.

2015 August 18 - Announcing Comet Catalina Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2015 August 18 Explanation: Will Comet Catalina become visible to the unaided eye? Given the unpredictability of comets, no one can say for sure, but it seems like a good bet. The comet was discovered in 2013 by observations of the Catalina Sky Survey.

Astronomers have discovered the first ever comet without a tail A strange, rocky comet with no tail has been spotted zipping into our inner Solar System, and it's so unique, it's got scientists ready to rewrite the definition of what these ubiquitous cosmic bodies should look like. According to a new report, the comet is carrying up to 1 million times less water than any other comet ever recorded, and it's made up of solid rock, like an asteroid, rather than ice, like a typical comet. So basically what we have here is a cross between an asteroid and a comet, and astronomers are flipping out. "This is super exciting, because it could be a piece of what formed Earth," one of the team, Olivier Hainaut from the European Southern Observatory, told Maddie Stone from Gizmodo. The tailless comet appears to have emerged from the Oort cloud - a vast, hypothetical bubble that encases the entire Solar System, and plays host to countless icy comets on its farthest edges.

Exploring Planets in the Classroom: Hands-on science activities Exploring Planets in the Classroom was a long-running summer workshop in Planetary Geosciences offered at the University of Hawai‘i at Manoa for the state's K-12 educators and librarians under the direction of Dr. G. Jeffrey Taylor. Hands-on activities in this course were developed and/or tested by the Hawai‘i Space Grant Consortium in cooperation with educators statewide.

Related:  Sky ScienceThe Solar SystemCinéma