It is zooming, from a point slightly right of the castle. The comparison clearly shows that the difference is decreasing on the right of the castle, so it might also be compressing due to drying sand or something, but I would also say zooming.
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You have to keep in mind that all these observations are symmetrical. That means that, as long as you don't destroy mass, the total gravitational force of the system, from outside the system, stays (about) the same. Also, there is gravitational binding energy, the amount of energy required to pull a...
- Mon Mar 25, 2013 9:22 pm UTC
- Forum: Science
- Topic: Orbital Path vs. Orbital Period
- Replies: 4
- Views: 3006
By the third of Kepler's laws of planetary motion, that's approximately true, cf: "The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit." (imagine Link to Wikipedia article here) That is, if the objects are very small relativ...
- Mon Mar 25, 2013 8:45 pm UTC
- Forum: Individual XKCD Comic Threads
- Topic: 1190: "Time"
- Replies: 106538
- Views: 41581035
Randall mentioned earlier that some frames are missing from the gif, and especially the way to the water and back seem very abrupt to me. Does anyone have any additional frames there? That's between fb0cabb8215b77a9d2fbdb44511eccdf9b921125bff5060dc511c9a49e97aa81.png and 426033682a26a0012a6f8e0c4728...