LIVE REAL TIME SATELLITE AND SPACE SHUTTLE TRACKING AND PREDICTI Feedback loops: How nature gets its rhythms - Anje-Margriet Neutel The music in this lesson was composed by Ross Allchurch. Feedback What is feedback? It is a process that is the result of mutual causal interaction: X affects Y and Y affects X. Feedbacks affect the way every single variable, every population in an ecosystem for example, responds to both internal and external perturbations. That is what happens with feedbacks in an ecosystem as well, it is all about the combination of feedbacks. Learn more about how feedbacks work, about positive feedbacks in natural systems, and the relation between feedback and system stability.Ecological networks Natural communities do not consist of simple food chains, they are complex networks of interactions. What will happen to a food web when we hunt big predators to extinction? To learn more about chains of interactions in complex ecological networks, watch the TED-Ed Lessons about the extinction of big predators, pollination by honeybees, and detritus.Measuring the feedbacks in real systems
Orbiter - A free space flight simulator Good(night) Moons Rising Paper Plate Education"Serving the Universe on a Paper Plate" The classic children's book Goodnight Moon by Margaret Wise Brown has excellent illustrations by Clement Hurd. Notice the location of the moon in the great green room's window. The clocks--on the mantle and on the nightstand--advance in 10-minute increments as the full moon rises appropriately in the evening. Two clocks show the passage of time. Meanwhile, the painting over the fireplace of the cow jumping over the moon accurately portrays a waxing crescent moon setting in the evening sky. More good moons rising: See Bad Moons Rising for examples of inaccurate depictions of moon phases in many children's books. Make a Moon Finder to correlate the moon's position with any given phase and time. Note: The images above are the copyrighted property of the creators, as cited. Contributed by Chuck Bueter. GLPA Proceedings, 1997, p. 161.
Stellarium Bad Moons Comments Paper Plate Education"Serving the Universe on a Paper Plate" What's wrong with these pictures? Plenty! As detailed in the Bad Moons Rising activity, a random sampling of children's books at a small local library reveals frequent errors in how moon phases are depicted. Below are excerpts from the books and brief descriptions of the story. Compare your observations with these comments about shortcomings and errors in the illustrations. Please send examples both of bad moons and of good moons rising--preferably with a digital image and complete information for each column below--through our Feedback page. Correction: The book showing Percy the train being lifted out of the water was erroneously attributed. Note: The images above are the copyrighted property of the respective creators, as cited. Contributed by Chuck Bueter. GLPA Proceedings, 1997, p. 161.
essays and commentary about the final frontier Home Plate--Paper Plate Education Welcome to a unique genre of education materials. Paper Plate Education is an initiative to reduce complex notions to simple paper plate explanations. This website promotes innovative hands-on Activities that you can experience across a range of interests, at varying degrees of complexity, and at a low price—all with common paper plates. Check out the exciting new material that has been uploaded to this website recently. Paper Plate Education evolves as educators contribute to its content.
Is The Simpsons actually set Down Under? Astronomer claims Springfield CAN'T be in America because latest episode shows the moon as seen in the southern hemisphere Less than two weeks after The Simpsons producer dismissed a theory that Homer has been in a coma for two decades, an astronomer has come up with another conspiracy: Springfield is in the southern hemisphere. In the latest episode of the show, SpaceX's Elon Musk guest starred and spends time at the Simpsons' home. At one point he stands by the dining room window, looking out at the night sky as the family sits behind him eating dinner. In The Simpsons' scene with SpaceX's Elon Musk, who was guest starring on the episode, the tips of the waxing crescent moon face right - how they would in the southern hemisphere In the northern hemisphere, the tips of a waxing crescent moon face left, pointing away from the sun, unlike what was seen in the new episode The waxing crescent moon is important to note, according to astronomer Phil Plait. In the northern hemisphere, the tips of a waxing crescent moon face left, pointing away from the sun. 'This is the moment that changed everything for me. Loaded: 0%
Lunar phase The phase and libration of the Moon for 2013 at hourly intervals, with music, titles and supplemental graphics. Animation of the Moon as it cycles through its phases, as seen from the northern hemisphere. The apparent wobbling of the Moon is known as libration. This video provides an illustration of how the Moon passes through its phases — a product of its orbit, which allows different parts of its surface to be illuminated by the Sun over the course of a month. Phases of the moon A crescent moon above Earth's horizon is featured in this image photographed by an Expedition 24 crew member in 2010. In Western culture, the four principal lunar phases are new moon, first quarter, full moon, and third quarter (also known as last quarter). The eight principal and intermediate phases are given the following names, in sequential order: Crescent Moon taken by MPG/ESO 2.2-meter telescope at La Silla. Upward-opening crescent Moon, as seen after sunset or before sunrise from the tropics.