Conscious Choice cover

From the press release: In this ground-breaking new history of early America, historian Robert Zimmerman not only exposes the lie behind The New York Times 1619 Project that falsely claims slavery is central to the history of the United States, he also provides profound lessons about the nature of human societies, lessons important for Americans today as well as for all future settlers on Mars and elsewhere in space.

Conscious Choice: The origins of slavery in America and why it matters today and for our future in outer space, is a riveting page-turning story that documents how slavery slowly became pervasive in the southern British colonies of North America, colonies founded by a people and culture that not only did not allow slavery but in every way were hostile to the practice.  
Conscious Choice does more however. In telling the tragic history of the Virginia colony and the rise of slavery there, Zimmerman lays out the proper path for creating healthy societies in places like the Moon and Mars.


“Zimmerman’s ground-breaking history provides every future generation the basic framework for establishing new societies on other worlds. We would be wise to heed what he says.” —Robert Zubrin, founder of founder of the Mars Society.


Available everywhere for $3.99 (before discount) at Amazon, Barnes & Noble, and all ebook vendors, or direct from the ebook publisher, ebookit. And if you buy it from ebookit you don't support the big tech companies and I get a bigger cut much sooner.

Another successful Falcon 9 launch

The competition heats up: SpaceX has successfully put two commecial satellites in orbit. The first stage hit the barge, but the landing was unsuccessful. More details to come.

The full video of the entire launch is embedded below the fold. One interesting part includes a view from inside the first stage looking back at the second stage at separate, followed with images from the first stage on its way back to Earth..


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  • Calvin Dodge

    I think Jeff Bezos was feeling the heat of competition, since he sent out an email this morning about progress on the BE-4 engine.

  • wayne

    Yes!– the view from the 1st stage looking up toward the 2nd stage, at separation, is an amazing angle.
    >starts about 30:24 into this video.

    Gives you a really good perspective not often shown. The 2nd stage appears to hang in space for a second while the engine ignites.

  • mkent

    The real advance on this mission is, in my opinion, the satellites. These are not miniature satellites in anything but mass. Each one has 48 Ku-band transponders. The secret to their relatively small size is that they have no liquid or solid propulsion system. The main engine is an ion engine.

    Comsats have had ion attitude control engines for years, but these (actually the first pair launched last year) are the first comsats to have an ion engine for their main propulsion system. And unlike Dawn or Deep Space 1, the Boeing 702SP design was commercially developed.

    Commercially developed spacecraft with ion engines. Sounds like the 21st century has arrived!

  • Alex

    SpaceX has achieved major milestones regarding towards reusability by controlling and guiding F9’s first stage towards barge and braking it finally. However, the present landing failure shows that SpaceX is only at the beginning of the overall process of reusability, which may take a full decade or so towards its full implementation.

  • Joe

    “Rapid unscheduled disassembly” the man has a sense of humor, very cool video, at least the first stage made it to the drone ship.

  • wayne

    Excellent video of multiple “separation events,” from a Soyuz rocket launch April 3, 2014:

    Vintage Apollo “4 & 6” stage-separation footage. “Approximately real speed,” –2nd-stage looking down & 1st-stage looking up.

  • Edward

    You are correct. The “all electric” satellite, one that uses ion propulsion instead of chemical reaction propellants, is the wave of the early part of this century. As you noted, satellite owners are able to save weight, which is why they were able to launch two satellites for the (launch) price of one.

    A downside is the delay in starting revenue operations, as it takes a little longer to achieve the final orbit, but the reduced launch cost can make up for that lost revenue.

    SpaceX is using this time, before full implementation of reusablity, to test the limits of their new system. Just as Blue Origin landed fast during one of their New Shepard tests, SpaceX landed their previous Falcon with the “Rocket landing speed was close to design max,” as Elon Musk tweeted.

    It would be interesting to find out what test caused yesterday’s landing to fail.

  • Pzatchok

    ION engines use xenon gas a propellant.

    It packs smaller and is not explosive.
    It also reacts well to the engine design. It takes a charge well. It ionizes better than other gases.

    Ion engines have been used for years by the Soviet Union/Russians.

    They have no heat, use almost no fuel, are only about 3 inches thick and can be attached almost anyplace on a satellite.

  • Edward

    We forgot to mention that with ion engines the specific impulse is very high, allowing for excellent mass-efficiency. This is why the satellite is lighter than it would be for a chemical engine and chemical station-keeping thrusters.

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