orbits evolve under the mutual gravitaional attractions. Save and print the simulation. Great for `lab exercises` in gravitational physics or for verifying numerical answers to textbook problems. Includes 29 introductory to advanced premade simulations with activities page in html-format. Simulations include elliptical satellite orbits, Kepler`s laws, double star, geocentric and heliocentric world view, Lagrange points, gravity assist, Hohmann orbit

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orbits, the sun and the moon. The nine planets including planet earth and their detailed physical & chemical information and image pictures is also displayed including solar power, solar energy and solar eclipse details. The graphical output is in high-resolution 3D full color format and the orbit view can be adjusted and the orbits tilted & rotated to any angle. The speed of the solar system can also be varied. The Solar System model is useful for

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The free screensaver, The Moon, was created by RateMyScreensaver.com and contains 19 high resolution images of the Moon. The Moon is the second brightest object in the sky after the Sun. As the Moon orbits around the Earth once per month, the angle between the Earth, the Moon and the Sun changes; we see this as the cycle of the Moon`s phases.

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Adastra Plus is a complete astronomy experience, with real-time sky, comprehensive reports, arcsecond accuracy, and exciting events such as animation and live orbital tracking. Two encyclopedic reference sources interactively link to the sky display, with planets, comets, asteroids, DSOs, and a multitude of stars. Let Sky Quiz quickly build familiarity with your local sky, as TimeLine shows the effects of precession through the millennia...

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Live interactive physics simulations let you explore the Solar System (orbits, seasons, gravity, tides, satellites and comets), play snooker (on a full size table) and experiment with Laws of Motion simulations. Now with machines ( pendulum clock and siege engines) bridge, crash and ideal gas simulations and experiments.

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SimSolar - Solar System Simulator for Windows. Planet labels and orbits can be activated for easier understanding. Includes simple display and controls, speed control, tilt and rotation options for easy viewing, earth centered mode, options for scaled planet and orbit sizes, and over 150 years of range. Registered version includes moon phase display, planet images, planet information, alignment finder, and a Galilean Moons of Jupiter simulator.

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