Types of solar and lunar eclipses An eclipse is an astronomical event where one celestial body partially or totally covers another celestial object. This happens when the eclipsing body comes between the observer and the eclipsed object like in the case of a solar eclipse, or when the eclipsing body temporarily cuts off the source of illumination of the eclipsed object, like during a lunar eclipse. Types of Eclipses With Animations: All Eclipses 1900-2099 Observers from Earth can see two types of eclipses – eclipses of the Sun (solar eclipses), and eclipses of the Moon (lunar eclipses). The term eclipse also finds its roots in ancient Greek – it comes from the word ékleipsis, meaning to fail or abandoned. Eclipses, solar and lunar, have fascinated scientists and lay people for centuries. Solar Eclipses Infographic: Types of solar eclipses. With Animations: Solar Eclipses 1900-2099 There are 3 kinds of solar eclipses: total, partial, annular. Total Solar Eclipses With Animations: Total Solar Eclipses 1900-2099 Lunar Eclipses
2011 Solar & Lunar Eclipse Skywatching Guide | Eclipses, Moon & Sun Photos | Skywatching, Amateur Astronomy There will be two total lunar eclipses and four partial solar eclipses in 2011. January 4 Partial Solar Eclipse This partial eclipse will be visible at sunrise in northwestern Europe and northwestern Africa, at midday in northeastern Africa and the Middle East, and at sunset in central Asia. Times of maximum eclipse and magnitudes at major cities: June 1 Partial Solar Eclipse This partial eclipse is visible mainly in the high Arctic. Times of maximum eclipse and magnitude at major cities: June 15 Total Lunar Eclipse This will be an almost central total lunar eclipse. July 1 Partial Solar Eclipse This partial eclipse is visible only in a small area of ocean near Antarctica, south of Africa November 25 Partial Solar Eclipse This partial eclipse will be visible from southern South Africa, Antarctica, and New Zealand. December 10 Total Lunar Eclipse This total eclipse is well placed for observers in eastern Asia, Australia, and northwestern North America. Source: RASC Observer's Handbook 2011
Sustainable Web Hosting - 10 Sensational Homes Built from Straw | green-building Written by Ryan Hollitz | 19 December 2009 Posted in Blog - Green Building New building materials could really make your house green from the ground up! Straw! via [thedailygreen.com] In the classic story of the Three Little Pigs‚ a naive piglet decides to build his home out of straw, which soon gets the huff and puff treatment by a big bad wolf, resulting in the poor little pig's untimely end. Many may wonder why a person would want to build a home made out of straw, but apart from providing a place to hide from the big bad wolf, they have some substantial benefits. Read on to discover just how right that first little pig was to build his home out of straw. Photos: Brett Weinstein/Realty Advocates 1. This unique, beautiful straw bale home in Oakland, California recently carried a $1.1 million price tag. Photo: JD Peterson 2. This gorgeous home, perched on owner Henry Siegel's 2 1/2-acre leafy lot, offers panoramic views and cozy comfort. Photo: University of Bath 3. 4. 5. 6. 7. 8. 9.
Eta Carinae's 21-Year Outburst: A Cosmic Instant Replay! : Starts With A Bang “Not explaining science seems to me perverse. When you’re in love, you want to tell the world.” -Carl Sagan Nothing lasts forever in this Universe, not even the seemingly timeless stars in the sky. Image credit: F. In most constellations, astronomers name the brightest star “Alpha,” the second brightest “Beta,” and so on. Well, almost etc. Image credit: © 2003 Torsten Bronger, annotated by me. Where that big red circle lives, with arrows pointing at it, lies what once was the seventh brightest star in the ancient constellation of Argo Navis: Eta (or η) Carinae. The star is still there, mind you, but it’s not nearly as bright as it used to be. Image credit: Celestia, by author / user HeNRyKus. Since that eruption, η Carinae’s brightness died down so severely that, by the 1860s, it was no longer visible to the naked eye. Image credit: University of Minnesota. So what, exactly, is η Carinae, and what happened here?! Image credit: ESO / Very Large Telescope / T.
Facebook Now Worth More Than Dell, eBay, Yahoo or Starbucks... on Paper Did you know that Facebook is worth more than Research in Motion, Starbucks, Dell, Yahoo, Adobe, Intuit or eBay? That's according to a wide variety of investments and valuations that have shot Facebook's stock into the stratosphere. Although Facebook is a private company, investors have been buying and selling shares of the Silicon Valley darling in private transactions and through services such as SecondMarket and SharesPost for some time now. Facebook's actual value depends on who you ask, though. Forbes thinks it's worth $23 billion. These valuations are based on real-world trades and transactions. Facebook's Value in Perspective Let's reflect on Facebook's $33 billion valuation relative to publicly traded companies. While Facebook still has a ways to go before it surpasses Google, Microsoft or Apple, it does beat or even dwarf some of the world's most iconic companies. Heck — Yahoo and Adobe could announce a merger and its value would barely equal the value of Facebook.
5 Easy to Grow Mosquito-Repelling Plants As the outdoor season approaches, many homeowners and outdoor enthusiasts look for ways to control mosquitoes. With all the publicity about the West Nile virus, mosquito repelling products are gaining in popularity. But many commercial insect repellents contain from 5% to 25% DEET. There are concerns about the potential toxic effects of DEET, especially when used by children. Children who absorb high amounts of DEET through insect repellents have developed seizures, slurred speech, hypotension and bradycardia. There are new DEET-free mosquito repellents on the market today which offer some relief to those venturing outdoors in mosquito season. Here are five of the most effective mosquito repelling plants which are easy to grow in most regions of the US: 1. Citronella is the most common natural ingredient used in formulating mosquito repellents. Citronella is a perennial ‘clumping’ grass which grows to a height of 5 – 6 feet. 2. Horsemint leaves can be dried and used to make herbal tea.
Solar Activity and Human Behavior: a link? In response to an earlier post I did about Solar Flares and GPS disruption, someone commented about the affects that solar activity can have on human behavior. Having read more about it since then, it seems that there are some interesting correlations. Here are some links I found on the subject: Sunspots and Human BehaviorThis article was published in the year 2000, just after the last Solar Maximum: The recent Solar Maximum gives us a wonderful opportunity to observe the Sun in action. It's interesting, but I want more proof. The Evidence: Historical Events During Sunspot Cycle Heights (1750-2000) The website is maintained by Carol Moore, who gives many more examples like this, with graphs, which appear to support professor A.L. A. [...] Ms. So the correlations make the theory more interesting, but what do we actually know, scientifically, about the affects of the sun's magnetic field on human beings? Could Cycles of War or Peace Be Tied to Cycles of the Sun? [...] So do I believe it?
$1 Billion Isn’t Cool. You Know What’s Cool? $50 Billion. Goldman And Facebook Agree. While everyone has been busy wondering when Facebook was going to IPO, most were looking past the first question: how is Facebook going to IPO? But not TechCrunch alum Evelyn Rusli and Andrew Ross Sorkin. Tonight the pair are reporting that Goldman Sachs has just led a major new investment in the social network. An investment that values it at a nice round $50 billion. And the likely reason is so Goldman can take Facebook public. More specifically, Goldman has invested $450 million in Facebook while Russian firm (and current large stakeholder) Digital Sky Technologies threw in another $50 million for a total of $500 million in this round. So is the IPO a done deal? Yet. The SEC is said to be looking into whether or not that Facebook is improperly skirting around the rules for going public. Either way, Goldman looks to make a a good chunk of change before the IPO as well. If that doesn’t piss the SEC off too much, that is huge for the firm.
Make Your Own Infographic Infographics are to data what storytelling is to an annual report: a more engaging way to help bring attention and understanding to your nonprofit’s cause. Yesterday we looked at an interesting infographic that suggested a new way to view your volunteers. Today, let’s look at infographics in general – and resources to help your nonprofit get started on making your own. As Wikipedia explains, “Information graphics are visual devices intended to communicate complex information quickly and clearly”: Information graphics or infographics are visual representations of information, data or knowledge. These graphics are used where complex information needs to be explained quickly and clearly, such as in signs, maps, journalism, technical writing, and education. ... For example, compare the Portrait of a Volunteer infographic we talked about yesterday with Pew Internet’s more conventional Portrait of a Twitter User, where a similar type of data is presented in a simple table.
1153 - Christmas Comet Lovejoy Captured at Paranal eso1153 — Photo Release 24 December 2011 The recently discovered Comet Lovejoy has been captured in stunning photos and time-lapse video taken from ESO’s Paranal Observatory in Chile. A new time-lapse video sequence was taken by Gabriel Brammer from ESO less than two days ago on 22 December 2011. In the words of Gabriel Brammer himself: “On the last morning of my shift I tried to try catch it on camera before sunrise. The sequence also features the pencil-thin beam of the VLT’s Laser Guide Star set against the beautiful backdrop of the Milky Way, as astronomers conduct their last observations for the night. ESO optician Guillaume Blanchard made a marvellous wide-angle photo of Comet Lovejoy and ESO Photo Ambassador Yuri Beletsky, captured the spectacle from Santiago de Chile. This bright comet was also seen from the International Space Station in another stunning time-lapse sequence on 21 December as the crew filmed lightning on the Earth’s night side. Notes More information Links Contacts
Implanted LED Tattoos May Become The Next Big Trend While it may seem like tattoos are the norm now, no one has ink like this. A team from the University of Illinois led by John Rogers has devised a method to actually install LED lights under the skin. The research, published today in Nature Materials, saw the team develop flexible arrays 2.5 μm thick and 100 x 100 μm square which are currently smaller than any commercially available array. In their research, the team printed circuits “directly onto a rigid glass substrate and then transferred them to an inexpensive biocompatible polymer called poly(dimethylsiloxane) (PDMS) to create a mesh-like array of LEDs and photodetectors.” In short, the university team has allowed LEDs to be placed under the skin while allowing for stretching and twisting by as much as 75 percent. Rogers said of his team’s research that commercializing the technology was “incredibly appealing” and he couldn’t wait to see the impact it has. + University of Illinois Via DVICE via PhysOrg
10 Awesome Free Tools To Make Infographics Advertisement Who can resist a colourful, thoughtful venn diagram anyway? In terms of blogging success, infographics are far more likely to be shared than your average blog post. This means more eyeballs on your important information, more people rallying for your cause, more backlinks and more visits to your blog. Designing An Infographic Some great tips for designing infographics: Keep it simple! Ideas for infographic formats include: Timelines;Flow charts;Annotated maps;Graphs;Venn diagrams;Size comparisons;Showing familiar objects or similar size or value. Here are some great tutorials on infographic creation: Creating Your Infographic Plan and research.If required, use free software to create simple graphs and visualisations of data.Use vector graphic software to bring these visualisations into the one graphic. Ultimately, if you have a little design skill, the very best approach is to create all the simple graphs and illustrations yourself using vector graphic software. Stat Planet Hohli
Mysteries in slow motion: Videos offer a glimpse into an aerial world we never see By Daily Mail Reporter Updated: 00:27 GMT, 15 January 2012 A series of high-speed animal flight videos are producing an amazing glimpse aerial world most of us have never seen before. Amateurs videographers, with a bit of luck, can use inexpensive digital cameras to turn blurred images into clear illustrations of animal and insect behaviour. A Dutch programme named Vilegkunstenaars asked videographers and animal lovers around the world to capture nature in flight, digg.com reports. Scroll down for videos Rough, tough world: A sparrow clings on as a bully barges him out of the way at the feeder before pushing him away with his leg In one year the contest attracted 460 amateurs who between uploaded more than 2,400 slow-motion video clips that were taken on their complimentary cameras. The jury was made up of video experts, philosophers and scientists. They picked their favourites, most of which are featured in still pictures here. The videos are all viewable on Youtube or at flightartists.com.
Projecting Your iPad Wirelessly - Without an Apple TV Important update: May 6, 2012 - Mirror to your Windows PC as well Shortly after the release of Relection a second mirroring solution called AirPlay was released - available at Reflection and Airplay both allow mirroring of an iOS device to a Mac. Many site members had asked about a solution that would allow mirroring to a Windows PC. When iOS 5 was released many of us were thrilled with its ability to allow projection (mirroring) of your iPad to a projector using Airplay and Apple TV. A wonderful new app called Reflection has just been released. Run the Reflection app on your MacBook and then switch to your iPad. Once you select your MacBook, you can now display your iPad on the laptop screen (as seen below ... and please don't remind me how many emails I still need to open...). Reflection is a wonderful solution for any situation where you need to project your iPad screen and don't have an Apple TV. When to use Reflection rather than an Apple TV: Sam Gliksman