TED教育影片. The Science Channel. Science & Reason on Facebook: Star Size Comparison: The biggest/largest known stars in the Universe.
---Please subscribe to Science & Reason:• VY Canis Majoris (VY CMa) is a red hypergiant star located in the constellation Canis Major. With a size of 2600 solar radii, it is the largest known star and also one of the most luminous known. It is located about 1.5 kiloparsecs (4.6×1016 km) or about 4,900 light years away from Earth. Antares is a red supergiant star in the Milky Way galaxy and the sixteenth brightest star in the nighttime sky (sometimes listed as fifteenth brightest, if the two brighter components of the Capella quadruple star system are counted as one star). The Pistol Star is a blue hypergiant and is one of the most luminous known stars in the Milky Way Galaxy.
Rigel (β Ori / β Orionis / Beta Orionis) is the brightest star in the constellation Orion and the sixth brightest star in the sky, with visual magnitude 0.18. Sirius is the brightest star in the night sky. SciShow. Learn Anything: 100 Places to Find Free Webinars and Tutorials. Many people want to learn things like how to fix their own sink or speak another language but just don't know how to find the information they need or realize that free educational materials are out there to help them learn.
Lucky for them, the Internet is full of tutorials and webinars that can be a great help in learning just about anything, whether practical or academic. We've compiled a list here of 100 places you can go to find all kinds of free educational information to get you started. General Find all kinds of tutorials and webinars on these sites.
Find Tutorials.com: Find tutorials on hundreds of topics ranging from crafts and hobbies to education on this comprehensive tutorial collection. Science. Resources For Earth Sciences and Geography Instruction - Central Michigan University. ICT11-12 @NDRS Vancouver BC - Novelties. Science House - Where Science Means Business. StudyJams. Interactive Websites. Anki - friendly, intelligent flashcards. Learning News, Videos, Reviews and Gossip - Lifehacker. I totally agree, but don't think that wikipedia-surfing is a good example, because you search for stuff that you want to know (or maybe easier to understand) while when reading a scrience book f.e. you have to read all the way through the article, even if some parts are harder to understand I tend to agree as well, but I've found that as someone who strives to learn almost to the exclusion of all else in my life, when that learning is severely depressed by any of a variety of factors, I'm encouraged to drink.
Maybe dumb people don't 'not care,' but they're just not as capable of learning, and lack to means of acquiring the necessary facilitation to expand their minds. Or, maybe you're right and they don't care. I think, as the years go on, I've come to believe that intelligence levels and opportunities are a lot more situational than I'd once thought. But yes, the desire, the motivation is a key factor in anything. The Excretory System - Human Body FREE Presentations in PowerPoint format, Free Interactives and Games. Video for Kids - Free - Science for Kids. Excellent! online lessons-High School Education Resource. Experiments (ABC Science)
Earth & Sky. The Lab Channel. Teach Engineering. Terrific Science. The Biology Place. Science Reporting for Kids. Science Digital Textbooks. Science With Me - Science Website for Kids. Science Matters. Yah, I know some of us are winding down from schooling for the summer months, but I can’t help but stay on the lookout for resources I know I’m going to be needing again all too soon.
I’ve come across some interesting science things of late that I want to check out – perhaps you, too, can find something useful. For your perusal: Free Online Textbooks and Curriculum Chemistry Packets: 13 units of chemistry; also has links to YouTube chemistry videos. Rocks and Minerals Unit Study. ESA/Hubble. Stereo-Eo-Eo-Eo. Give Yourself a Hand. Crystal Gardens. Mozilla Firefox. MAKE HOMEMADE SCIENCE TOYS AND PROJECTS. Science Experiments, Amateur Science demonstrations, projects: SCIENCE HOBBYIST.
Universities with the Best Free Online Courses. Free online courses are offered by real schools.
Learn which courses are available, what topics they cover and which ones lead to real college credit. Online Courses for Credit All of the schools listed below are well-known universities with a variety of free online course offerings. These classes are typically offered as part of an OpenCourseWare (OCW) project. Branches of Science. Applied Math and Science Education Repository - Browse Resources. Browse by Topic. Space Time Travel – Relativity Visualized.
5 Really Weird Things About Water. Water, good ol' H2O, seems like a pretty simple substance to you and me.
But in reality, water - the foundation of life and most common of liquid - is really weird and scientists actually don't completely understand how water works. Here are 5 really weird things about water: 1. Hot Water Freezes Faster Than Cold Water Take two pails of water; fill one with hot water and the other one with cold water, and put them in the freezer. Space Travel & Everyday Design. Discover Engineering. Scale of Universe - Interactive Scale of the Universe Tool. 200 Free Online Classes to Learn Anything. Stevespanglerscience's Channel
Ideas - TREEFINDER. My subversive attempts to do something useful.
The Rotary Piston Array Machine -- Air-Sea Temperature Difference Engine -- Solarthermal Power Generator The Rotary Stirling Engine The Wave Pump Heat Engine With No Compressor Portable Tent Platform The rotary piston array (RPA) is the possibly most compact and most elegant machine to transform the volumetric change of gas into shaft work and vice versa. It can be used as pneumatic motor, steam engine, gas compressor, vacuum pump and the like, but also as part of new heat or combustion engines which – like the Stirling engine – open new ways to harvest renewable energy.
Other possible uses are refrigeration and air-conditioning. The idea has been overlooked for at least 110 years, as some old patents indicate, and it seems to have been reinvented several times (e.g. The machine comprises an array of equally shaped twisted rotors with parallel axes. Air-Sea Temperature Difference Engine. Einstein for Everyone. Einstein for Everyone Nullarbor Press 2007revisions 2008, 2010, 2011, 2012, 2013 Copyright 2007, 2008, 2010, 2011, 2012, 2013 John D.
Norton Published by Nullarbor Press, 500 Fifth Avenue, Pittsburgh, Pennsylvania 15260 with offices in Liberty Ave., Pittsburgh, Pennsylvania, 15222 All Rights Reserved John D. An advanced sequel is planned in this series:Einstein for Almost Everyone. Imagining the Tenth Dimension - A Book by Rob Bryanton. Science in Seconds. Invar® & Steel Alloys. Lists of Nobel Prizes and Laureates Invar® & Steel Alloys Play the Invar & Steel Alloys Game About the game The steel alloy invar is a material that hardly expands due to temperature changes.
Today it is used in toasters, irons, gas stoves, and CRT computer monitors. The Nobel Prize The 1920 Nobel Prize in Physics was awarded for the discovery of invar, a steel alloy that hardly expands at all and thus is important in scientific instruments. Reading. 50 Really Cool Online Tools for Science Teachers. A 21st-century education revolves around the Internet for everything from collaboration, tools, lessons, and even earning degrees online.
If you are looking for ways to integrate online learning into your science class or science degree programs, then take a look at these cool online tools that are just perfect for both teachers and students. Science Tools to Use with Students These tools offer opportunities for learning about climate, cells, the human body, nature, and more. ChemiCool. Share this periodic table with your class for an easy to use tool with information on each of the specific elements.GPS Activities and Lesson Plans. AP Tools. Molecular Workbench - Database. Molecular Workbench offers interactive, visual simulations and activities that have been widely used in science teaching for students of all ages. Our database is designed to provide teachers and students with easy access to our model-based activities.