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Paper discussing the possibilities for superluminal (faster-than-light) travel. Geometric and algebraic comparison of Galilean and Minkowski space-time properties. Several links and references.
The path of a ray of light between two points is the path that minimizes the travel time. This java applet lets you visualize the above statement. Useful for college level students and those study ...
Subrahmanyan Chandrasekhar (1910 - 1995) In 1930 he showed that a star of a mass greater than 1.4 times that of the Sun had to end its life by collapsing into an object of enormous density unlike any ...
Contains information on the most recent earthquakes around the world - less than 14 hours ago. Also data - predicted p-wave times for example. An excellent site for keeping abreast of the latest ...
A great timeline showing the major achievements in space travel over the last 50 years.
Michio Kaku explores the possibility of interstellar travel
Mae Jemison, the former NASA astronaut and the first African American woman in space talks about interstellar space travel.
The Official Source of Time for the Department of Defense and the Standard of Time for the United States.
How do you measure time? A guided tour of the history of the measurement of time from ancient calendars and sun dials to modern day atomic clocks.
An outline of ISO 8601, the internationally agreed date and time format. It specifies the numeric representation of date and time.
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