NOVA | Einstein's Big Idea | Relativity (Lightman Essay) | PBS
http://www.pbs.org/wgbh/nova/einstein/relativity/

This website contains a lot of good information, but it is not overwhelming, which makes it easy to read. Also, it has illustrations that help you to understand the theory of relativity. It is credible because it was written by a physicist and includes a photograph of him and personal information to confirm that he is an actual person.

This article is about realativity and the cosmos. It gives a background on the essense of gravity and the goes on to tell more about stars. I chose this site because I know that PBS is a trustworthy orgnaization.

this site seems to be very reliable. i chose it because it was one of the first links to come up as one of the most used by other students. it seems to be written by an expert as well.

comment on the issue of fairness in teaching elementary physics

‘About 6-7 years ago, I was in a philosophy class at the University of Wisconsin, Madison (good science/engineering school) and the teaching assistant was explaining Descartes. He was trying to show how things don't always happen the way we think they will and explained that, while a pen always falls when you drop it on Earth, it would just float away if you let go of it on the Moon. My jaw dropped a little. I blurted "What?!" ’

Check out the little bloke on Neptune...

Cool graphic comparing gravity wells of solar system.

Gravity keeps our feet on the ground and our planet circling the sun, but we know remarkably little about it. New Scientist investigates the force's greatest mysteries.

"Modeling the absence of centrifugal force"

What would happen to our oceans if the Earth stopped spinning ? http://www.esri.com/news/arcuser/0610/nospin.html

What would happen if the Earth stopped spinning?

The following is not a futuristic scenario. It is not science fiction. It is a demonstration of the capabilities of GIS to model the results of an extremely unlikely, yet intellectually fascinating query: What would happen if the earth stopped spinning? ArcGIS was used to perform complex raster analysis and volumetric computations and generate maps that visualize these results. the world as we know it earth's ellipsoid

If the earth's gravity alone was responsible for creating a new geography, the huge bulge of oceanic water—which is now about 8 km high at the equator—would migrate to where a stationary earth's gravity would be the strongest. This bulge is attributed to the centrifugal effect of earth's spinning with a linear speed of 1,667 km/hour at the equator. The existing equatorial water bulge also inflates the ellipsoidal shape of the globe itself.