Astronomy

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NASA Science. The Scale of the Universe - Swirl. The Known Universe. Daylight Hours Explorer. Shows the hours of daylight received during the year for an observer at a given latitude.

Daylight Hours Explorer

This is an important factor contributing to the seasons. Running this animation on your computer... right-click to download daylighthoursexplorer.swf and daylighthoursexplorer.html to the same directory open the html file in a browser to run the animation Linking to this animation... copy and paste the code below into your webpage or blog: Planets. Planetarium - Interactive star map and virtual sky. Your Age On Other Worlds. Looking at the numbers above, you'll immediately notice that you are different ages on the different planets.

Your Age On Other Worlds

This brings up the question of how we define the time intervals we measure. What is a day? What is a year? The earth is in motion. Actually, several different motions all at once. S Curiosities. Mars Rocks. Astro.unl.edu/naap/motion3/animations/sunmotions.swf. SolarBeat. WIKISKY.ORG. Solar System Visualizer.