For many years time travel was the stuff of science fiction. This was all just part of the world's imagination until recently. Scientists now believe that the current laws of physics allow us to travel though time. They believe that we can now travel back to see our founding fathers sign the declaration of independence. We could travel to 2999 to ... a loop to loop that runs into it as it comes around. This closed loop is called a closed time like curve. These curves could be used to travel into our own history. All the clams made about time travel are consequences of the basic scientific la...

• Word Count: 2726
• Approx Pages: 11
• Grade Level: High School

... the pressure force acts outward (I am ignoring rotation here). The system is a little more complicated for a star, since the interior temperature is not constant, and it depends on the past history of the fluid ensemble. Let's derive de hydrostatic equilibrium; consider a cylindrical region (length dr, and area dA) at a distance r (from the center of the sun for example) And the cylinder ... opacities, the equation of state, the nuclear reaction cross sections, the convective modeling, the element abundance determinations, and the atmospheric structure. The model can also be improved by...

• Word Count: 2570
• Approx Pages: 10
• Has Bibliography
• Grade Level: High School