Hacker News
- 'gravity wells' - depiction of relative gravity in the solar system http://xkcd.com/681/ 12 comments
- Could I jump off of the moon Deimos? http://xkcd.com/681/ 12 comments askscience
- xkcd: Gravity Wells http://www.xkcd.com/681/ 8 comments reddit.com
- xkcd: Gravity Wells http://xkcd.com/681/ 19 comments science
Linking pages
- Interplanetary Superhighway. Finding the routes mankind will take to… | by Julian Benson | Medium https://medium.com/looking-up/8e3e734346ed 67 comments
- The Trillionaires of Mars - by Devon Eriksen https://devoneriksen.substack.com/p/the-trillionaires-of-mars 5 comments
- Why the World Will Run Out of Helium | by Ethan Siegel | Starts With A Bang! | Medium https://medium.com/starts-with-a-bang/6757fcdaa283 1 comment
- The infographics of xkcd | halfblog.net http://halfblog.net/2013/01/22/infographics-of-xkcd/ 0 comments
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