Venkatesh Rao@vgr😧Quote Tweetdorian@doriantaylor·Mar 9, 2017Replying to @vgrwhile I was looking at the Tsiolkovsky rocket equation I realized if our planet was not much bigger you couldn't get a rocket off it.5:25 AM · Mar 9, 20171 Retweet5 Likes
sam atman@djinnius·Mar 9, 2017Replying to @vgrnot only that, if the Moon were slightly closer, or further from Earth, total and annular eclipses wouldn't happen.