Origins: Earth is Born - A hellish, fiery wasteland, a molten planet hostile to life, yet somehow, amazingly, this is where we got our start. How? How did the universe, our planet, how did we ourselves come to be? How did the first sparks of life take hold here? Are we alone in the cosmos? Where did all the stars and galaxies come from? These questions are as ancient as human curiosity itself. And on Origins, a four-part NOVA mini-series, we'll hunt for the answers.   Watch Online. Earth - This collection of NOVA programs are available to watch online, divided conveniently into chapters and closed captioned for deaf and hard-of-hearing viewers. Earth - From the perspective we get on Earth, our planet appears to be big and sturdy with an endless ocean of air. From space, astronauts often get the impression that the Earth is small with a thin, fragile layer of atmosphere. For a space traveler, the distinguishing Earth features are the blue waters, brown and green land masses and white clouds set against a black background. Earth - Earth, of course, can be studied without the aid of spacecraft. Nevertheless it was not until the twentieth century that we had maps of the entire planet. Pictures of the planet taken from space are of considerable importance; for example, they are an enormous help in weather prediction and especially in tracking and predicting hurricanes. And they are extraordinarily beautiful. Our Restless Tides (NOAA) - A brief explanation of the basic astronomical factors which produce tides and tidal currents     1. - Introduction     2. - The Astronomical Tide-Producing Forces: General Considerations     3. - Detailed Explination of the Differential Tide-Producing Forces     4. - Variations in the Ranges of the Tides: Tidal Inequalities     5. - Factors Influencing the Local Height and Times of the Arrival of the Tides     6. - Prediction of Tides Water Level Stations - These raw data have not been subjected to the National Ocean Service's quality control or quality assurance procedures and do not meet the criteria and standards of official National Ocean Service data. They are released for limited public use as preliminary data to be used only with appropriate caution. Relating to our Earth     Aurora   Eclipses   Maps   Moon   Sun   Weather NASA JSC Digital Image Collection - Each Shuttle mission produces 2000 to 5000 photographic images. Over 250,000 images have been captured, digitized, and stored. Learn more about this collection and the JSC digital imaging project. NASA generally does not assert copyright, however learn more about conditions for use of images. Now full text search capabilities are implemented. A graphical browser for all cataloged Shuttle Earth Observation images is also available. (NOTE: Digital images are not available for all images referenced by the graphical browser.) The NASA Photo Gallery is an attempt to bring all of NASA's still images to one location.     © Copyright 2007 - Samuel J. Wormley   by swormley1@mchsi.com