Reference Books

  • George P. Sutton, Oscar Biblarz: Rocket Propulsion Elements
  • John R. London: LEO on the Cheap
  • Gerald K. O'Neil: The High Frontier

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July 28, 2009


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John Bossard

This is a test posting to see if the comments are showing up. If you can read this, and want to provide a comment, I would really appreciate the interaction. Currently, I do not have the "approval" feature turned on, meaning that comments get posted as they entered, and I do not have to approve them before they are posted.

John Bossard

note: be sure and use the CAPTCHA (the goofy-shaped letters input box) to confirm you post. It appears lower down on the screen after you have hit the "post" button so make sure you scroll all the way down. Its sort of hard to see at the bottom, and thus easy to miss.

John Bossard

another test post


If you would like to draw a clearer symbolic contrast between exvironmentalism and environmentalism, I recommend that the exV symbol use the "language" of the enV symbol.


-- Use the same color of green
-- Same arrowhead style
-- same "half-twist" in the arrows

BUT (and this is the "symbolic dialogue"):

-- the arrows spiral outward
-- in contrast to the triangle of the recycling symbol, the arrows create a circular envelope.

The recycling symbol communicates the idea that Nature (the green color) is a closed system that reuses everything in an endless loop. The equilateral triangle suggests stability and equilibrium.

The exV symbol could use the same color (Nature) to emphasize that the way Nature works is an open system (the spiral), that it succeeds by spreading out to fill all possible spaces.

Finally, the implicit circle is a clearer reference to Earth than the recycling symbol's triangle, and the arrows more clearly suggest that human agency is behind the functioning of the arrows spiraling outward.

John Bossard

thank you for your thoughtful suggestions regarding possible exvironmentalism symbols. These are good comments. I also like your notation "exV" (in contrast to enV).

In some ways, I want to break from environmentalism ideas, and draw a strong distinction between exV and enV. Green is the color of photosynthesis, and as such represents a fundamental base of the terrestrial food pyramid. However, not all life is photosynthetically based, or relies on the solar energy. Even on Earth, thermal vent life has established a fundamentally different energy cycle. In addition, the emergence of consciousnesses in machine intelligence cannot be adequately represented by green, IMHO. So I thought blue and black made for better colors.
The equilateral triangle has deep mystical and religious symbolism, and is echoed in the arrowheads and overall shape. I also thought it looked better than the flattened, 70's-era type of arrowhead.
I'm glad you brought up the notion of closed vs. open systems. I contend that exvironmentalism is predicated on the notions of open systems (as opposed to closed systems), whereas environmentalism seems more closely aligned with closed systems (i.e. recycling).
Perhaps it didn't come out clearly in the graphic (thanks to my limited skill in creating graphics), but there is a circle around the Earth symbol, but its a bit jaggy. Also, it's probably not very clear, but the shafts of the arrows that emerge from this circle are curved and are meant to denote an outward spiraling effect, just as you suggest.
Anyway, its interesting to discuss these symbolic notions. Perhaps I can hire a graphic artist to clean things up. Discussion and the exchange of ideas always helps.


Thx for the explanation of the environmental symbol !! very interesting

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