velocity
Tag archives for velocity
Avoiding Armageddon!
Posted by Ethan on May 8, 2008 Let’s say we’re having a nice day here on Earth; the Sun is shining, the clouds are sparse, and everything is just looking like a peach: And then Lucas goes and tells me, Oh my God, Ethan! It’s Armageddon! An asteroid is coming straight for us! You’ve got to stop it! Really? Me? Well, how…
Is Dark Energy the same as Acceleration?
Posted by Ethan on April 10, 2008 In a comment on my last post, What is Dark Energy, Kendall asks the following, which is such a good one I think it deserves its own post: I thought the expansion was accelerating? Aren’t you saying that it is on its way down to 85% of its current rate? Sounds like expansion is slowing,…
How old is the Sun in Galactic years?
Posted by Ethan on February 27, 2008 The Moon goes around the Earth, the Earth goes around the Sun, and the Sun goes around the center of the Milky Way. We know the Moon takes about 4 weeks to make its trip around the Earth, and that causes the Moon phases: We also know that the Earth takes one year to go…
