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Types of solar and lunar eclipses

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 Related:  Astronomy & PhysicsAstronomy & Spacewillsman

Solar Eclipse Page The next Total Eclipse of the Sun Visible from the USAClick for special web page on the Total Solar Eclipse of 2017 Aug 21 Solar Eclipses: Past and Future The following links give information on all eclipses of the Sun and Moon from 2000 through the current year. Dates, maps and details for 5000 years of solar eclipses can be found in: Five Millennium Catalog of Solar Eclipses: -1999 to +3000 The Javascript Solar Eclipse Explorer lets you calculate the visibility of solar eclipses from any city for hundreds of years in the past and future: Javascript Solar Eclipse Explorer Search for solar eclipses by date interval, type, and magnitude, and plot the results on Google maps: Five Millennium Solar Eclipse Search Engine Other useful links to past and future solar eclipses are as follows. Solar Eclipses: 2011 - 2020 The table below lists every solar eclipse from 2011 through 2020. The Key to Solar Eclipse Table contains a detailed description of each item in the table. Decade Tables of Solar Eclipses

Supermoon – Super Moon A Supermoon is a full Moon or a new Moon at its closest point to Earth; also called perigee. A Supermoon looks around 12 to 14% bigger than its counterpart, the Micromoon. Perigee and Apogee The Moon's orbit around the Earth is not a perfect circle, but elliptical, with one side closer to the Earth than the other. The point on the Moon's orbit closest to the Earth, is called the perigee and the point farthest away is the apogee. 238,000 Miles on Average This means that the distance between the Moon and Earth varies throughout the month and the year. Moon Phases worldwide When a full Moon or new Moon coincides with being closest to Earth, it is called a Supermoon, Super Full Moon, or Super New Moon. A Micromoon, on the other hand, is when a full or a new Moon is farthest from the Earth (apogee). Not an Official Name Supermoon is not an official astronomical term. There are currently no official rules as to how close or far the Moon must be to qualify as a Supermoon or a Micro Moon.

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

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. SharesPost pins its value at $26.3 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. Breaking Down the Numbers

2014 Lyrids meteor shower In 2016, the Lyrids are expected peak on April 22 and 23. A Full Moon on April 21, 2016 will make it difficult for observers to view the meteor shower. When Can I See the Lyrids? The Lyrid Meteor Shower is usually active between April 16 and April 25 every year. The best time to see shooting stars from the Lyrids is after nightfall and before dawn, weather permitting, of course. Sunrise and Sunset in my City Dust From Comet Thatcher The Lyrids are created by debris from comet Thatcher, which takes about 415 years to orbit around the Sun. Where Can I See the Lyrids? Considered to be the oldest known meteor shower, the Lyrids are named after constellation Lyra. While people in the Northern Hemisphere are best located to view the Lyrids, those in mid Southern Hemisphere latitudes can also see the shower between midnight and dawn. Astronomers suggest looking up towards the East to see shooting stars from the Lyrids, the table below shows the exact direction of the Lyrids from your location.

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. At any moment, any one of the brilliant, twinkling points of light from across the galaxy could run out of fuel, ending its life as we know it. 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.

$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.

start chapter 0: Introductory Materials[+] 1: Introductory Physics: A Model Approach, Online Edition 2: Copyright and License 3: Dedication: 4: Foreword 5: Introduction to the Second Edition 6: Author’s Preface 7: Table of Contents chapter 1: The nature of science[+] 1: The scientific process 2: Domains of magnitude 3: Theories and models in science 4: Definitions 5: Length, time, and mass 6: Summary 7: List of new terms 8: Problems 9: Bibliography chapter 2: Reference frames[+] 1: Relative position 2: Relative position 3: Displacement 4: Summary 5: List of new terms 6: List of symbols 7: Problems 8: Bibliography chapter 3: The interaction concept[+] 1: Evidence of interaction 2: Historic background 3: Systems 4: Collecting evidence of interaction 5: Interaction-at-a-distance chapter 4: Matter and energy[+] 1: Conservation of energy 2: Systems and subsystems 3: Passive coupling elements 4: Forms of energy storage 5: The many-interacting-particles (MIP) model for matter 6: Equilibrium and steady states 7: The feedback loop model

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?

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

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