893: 65 Years
| 65 Years |
 Title text: The universe is probably littered with the one-planet graves of cultures which made the sensible economic decision that there's no good reason to go into space--each discovered, studied, and remembered by the ones who made the irrational decision. |
[edit] Explanation
In this comic, over 65 years, Randall is projecting the number of living humans who have walked on another world, counting the Moon as a 'world'. He is using actuarial tables or life tables which shows for each age the probability that a certain person will be alive by their next birthday. Although not named, the graph refers to the 12 Apollo astronauts who landed on the Moon between 1969 and 1972.
This comic assumes that no one else is going to walk on another world going forward into the future which, as is mentioned in the image text, is a terrible idea for the future of the human race. If the human race only exists on one planet — one disaster can destroy the whole race. However, if humans extend their society to other planets, they lessen the risk of complete extinction.
[edit] Transcript
- [A graph titled 'Number of Living Humans Who Have Walked on Another World' — its y-axis is numbered 5, 10, 15; its x-axis increments every ten years from 1960–2040. The line of the graph has a bracket above it that says '65 Years', starting at 1969, ending in 2034.
- The line starts at 1969 and increases steeply to 12 by 1972. It then plateaus until 1991, then declines in three steps to 9 by 1999, and then plateaus again.
- From 2011–2035, which is labeled 'Projected Actuarial Tables', the line branches into three and begins to decline more steeply to zero. The first is labeled '5th percentile' and the third is labeled '95th percentile'; the middle is presumably for the 50th percentile. The area between the lines is shaded. The lines reach zero between about 2022 and 2034, indicating that there is less than a 5% chance that anyone in the group will be alive after that ... unless new people are added.]
add a comment!Discussion
- Glad you asked! </Information Hen> Neil Armstrong and Buzz Aldrin landed in July 1969; that's two. Pete Conrad and Alan Bean joined the group that November; that's four. Alan Shepard and Edgar Mitchell in February '71; that's six. David Scott and James Irwin in July '71; that's eight. John W. Young and Charles Duke in April '72; that's ten. Eugene Cernan and Harrison Schmitt in December '72; that's twelve. Irwin died in '91, dropping it to 11. Shepard and Conrad died in '98 and '99 respectively, making it 9 as of the date this comic was published. Armstrong died in '12, so our current number is 8. The oldest living person to have landed on the moon is Aldrin, 83. There are two 82-year-olds, two 80s, one 78 and two 77s. Ekedolphin (talk) 13:28, 27 January 2013 (UTC)
