2006-06-27 15:49:10 · 4 answers · asked by john yaya 1 in Science & Mathematics ➔ Astronomy & Space
The usual analogy is a spotted balloon being blown up. Say the spots are evenly distributed 1 inch apart all over the balloon. Pick any spot as your home galaxy. The next galaxy, or spot, is 1 inch away and the spot beyond that is 2 inches away. Now blow up the balloon until all the spots are 2 inches apart. Let us also assume it takes you 1 minute to blow it up that much. The nearest spot that was 1 inch away is now two inches away, 1 inch farther than it was a minute ago. The spot beyond that, the one that used to be 2 inches away is now 4 inches away. So the nearby spot is moving away at 1 inch per minute and the second spot is moving away at 2 inches per minute. A spot that was 6 inches away is 12 inches away after 1 minute, or moving away at 6 inches per minute. In fact, every spot is moving away from every other spot at a speed that is directly related to how far away that spot is at any moment. Now space is not a balloon and galaxies are not spots, but it is only an analogy.
2006-06-27 16:25:05 · answer #1 · answered by campbelp2002 7 · 0⤊ 0⤋
Look at the units of the Hubble constant: "kilometers per second per megaparsec."
In other words, for each megaparsec of distance, the velocity of a distant object appears to increase by some value.
For example, if the Hubble constant was determined to be 50 km/s/Mpc, a galaxy at 10 Mpc would have a redshift corresponding to a radial velocity of 500 km/s.
2006-06-27 15:56:29 · answer #2 · answered by DE 1 · 0⤊ 0⤋
If you threw a ball upwards, will the kinetic energy increase as the potential energy increases? Obviously not.
Hubble's law is incorrect because it states that both distance (potential energy) and velocity (kinetic energy) keep increasing.
2006-06-27 17:11:04 · answer #3 · answered by peaceharris 2 · 0⤊ 0⤋
i dont wanna explain u crappy laws lol
2006-06-27 16:40:53 · answer #4 · answered by flamen s 2 · 0⤊ 0⤋