I don't exactly know what to say about xkcd's illustration of our planets' and moons' gravity wells, other than that it's completely awesome-and a handy tool for understanding astronomical forces. Did you know that you could throw a baseball hard enough to exit the gravitational pull of the moon Phobos? Now you do.Check out the large version here.Via Kottke.
I don't exactly know what to say about xkcd's illustration of our planets' and moons' gravity wells, other than that it's completely awesome-and a handy tool for understanding astronomical forces. Did you know that you could throw a baseball hard enough to exit the gravitational pull of the moon Phobos? Now you do.Check out the large version here.Via Kottke.