Zidbits - Learn something new every day! Gallery : The shape of Planet Earth 1. Introduction The shape of the Earth has intrigued scientists throughout history. We know also that it is not a perfect sphere: the diameter from pole to pole is shorter than the diameter at the equator. The theoretical shape of the Earth has been studied by mathematicians over the past 4 centuries (although the interest has waned the last 40 years or so). It was Isaac Newton who first claimed that the Earth is not spherical, but "oval". In what follows we will discuss the theoretical shapes the Earth could take at a higher angular momentum, through the milestone discoveries of Colin MacLaurin, Carl Jacobi, and Henri Poincaré. Clicking the image above will bring up a film of the Earth as we all know it, only it turns about 800 times faster than it does in reality (otherwise the film would have to last for 24 hours for one full turn). 2. MacLaurin shows that, as the angular momentum increases, the Earth will get ever more flat. 3. 4. 5. 6. 7. 8. An introduction to Geodesy.
How To Write Shop | Earth and Moon Viewer Welcome to Earth and Moon Viewer. Viewing the Earth You can view either a map of the Earth showing the day and night regions at this moment, or view the Earth from the Sun, the Moon, the night side of the Earth, above any location on the planet specified by latitude, longitude and altitude, from a satellite in Earth orbit, or above various cities around the globe. Images can be generated based on a full-colour image of the Earth by day and night, a topographical map of the Earth, up-to-date weather satellite imagery, or a composite image of cloud cover superimposed on a map of the Earth, a colour composite which shows clouds, land and sea temperatures, and ice, or the global distribution of water vapour. Viewing the Moon In addition to the Earth, you can also view the Moon from the Earth, Sun, night side, above named formations on the lunar surface. or as a map showing day and night. Browser Requirements Credits Related Software on this Site On the Web: Moon at Perigee and Apogee. For Windows:
The Greatest Books: The Best Books of All Time - 1 to 50 12 Common Causes and Proven Cures for Unhappiness Email For the average person happiness is a choice, yet numerous people are unhappy. There are many reasons, but it all boils down to one simple principle: They choose something else over happiness. Because it often takes less effort to be unhappy. For example, instead of seeking happiness, they… Lazily follow the path of least resistance.Refuse to accept change.Aimlessly try to control the uncontrollable.Etc. etc. etc. Averting these poor choices and the negative attitudes that accompany them is the key. Most people are about as happy as they make up their minds to be. - Abraham Lincoln 1. Franklin D. Sure you have responsibilities. You must leave time to follow your inner curiosity and passion. is a great read on this topic. 2. Right now is life. Focus on the present, not yesterday or tomorrow. Oftentimes we fixate our minds on the way things can be, should be, or will be someday. 3. Remember, your health is your life, and your body is the greatest tool you’ll ever own. 4. 5. 6. 7. 8. 9.
Wasted Talent - a webcomic by Angela Melick The Mysterious Moeraki Boulders If you go down to Koekohe beach in New Zealand you can be sure of a big surprise. In front of you, scattered like enormous marbles from some long abandoned game between giants, are hundreds of giant spherical rocks. Or are they the egg shells of sea-born dragons? The Moeraki boulders present us with a mystery – what are they and how on earth did they get there? Some are isolated but may occur in clusters. Many of the Moeraki boulders give the impression of being completely spherical – and they almost are. They do, however, tend to form early on in the history of the deposited sediment – it is thought they occur before the rest hardens in to rock. What is significant about these concretions is their size. The material responsible for their concretion is a carbonate mineral called calcite. There are large cracks on the boulders and these are known as septaria. The Moeraki boulders date from the Paleocene epoch which translates as the early recent.
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