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| . no, different, but easier with proper infrastructure. Earth escape energy is 63 MJ/kg, lunar escape velocity energy is 2.8 MJ/kg ... 22 times less energy to dissipate, with no atmosphere to constrain the solution. An "inverse launch loop" track could shed that lunar arrival kinetic energy in d=E/a distance; for acceleration a=20 m/s², d=140 km, time =. Decelerating a few incoming vehicles wouldn't pay for the track, but one per minute is half a million per year. In detail, a Hohmann transfer orbit ellipse from Earth radius perigee 6500 km (122 km equatorial altitude) to lunar orbit radius apogee ( r = 385000 km equatorial altitude). Estimate perigee launch velocity as approximately Earth escape velocity 11.2 km/s; from conservation of angular momentum the apogee velocity is approximately (6500 km / 385000 km )*11200 m/s ≈ 190 m/s . That is not much energy difference compared to lunar escape energy. .p030 [[ | ]] .p030 [[ | ]] .p031 [[ | ]] .p032 [[ | ]] .p032 [[ | ]] .p033 [[ | ]] .p034 [[ | ]] .p035 [[ | ]] .p036 [[ | ]] .p037 [[ | ]] |
. no, different, but easier with proper infrastructure. Earth escape energy is 63 MJ/kg, lunar escape velocity energy is 2.8 MJ/kg ... 22 times less energy to dissipate, with no atmosphere to constrain the solution. An "inverse launch loop" track could shed that lunar arrival kinetic energy in d=E/a distance; for acceleration a=20 m/s², d=140 km, time =. Decelerating a few incoming vehicles wouldn't pay for the track, but one vehicle per minute is half a million per year. A complex trajectory and traffic management problem, but staging hundreds of thousands of vehicles into multiple-cycle Hohmann loops, sorting vehicles into multiple "arrival runways" at multiple locations. .p029 Bezos (born 1964) childhood heros were Apollo astronauts ... hmm. Apollo 11 to 17 was 1969 to 1972; how much would a 5 to 8 year old understand? .p030 [[ https://en.wikipedia.org/wiki/New_Shepard | New Shepard ]] and [[ https://en.wikipedia.org/wiki/New_Glenn | "Very Big Brother" -> New Glenn ]] .wp mentions New Glenn 7x2 followed by New Glenn 9x4 "as early as 2027". [[ https://en.wikipedia.org/wiki/Cape_Canaveral_Launch_Complex_36 | Launch Complex 36 ]] also [[ https://en.wikipedia.org/wiki/Vandenberg_Space_Launch_Complex_9 | Vandenberg Space Launch Complex 9 ]] .p031 also a landing at [[ https://en.wikipedia.org/wiki/Shackleton_(crater) | Shackleton Crater ]] at lunar south pole. .p032 "I started Amazon just to feed my space habit" .p033 proposal 24 pages marked "Blue Origin Proprietary & Confidential" .p034 [[ https://en.wikipedia.org/wiki/BE-7 | BE-7 ]] engine using hydrogen extracted from south pole craters. . I'm skeptical - how much will this plant weigh (including photovoltaics, and replacement parts?) .p035 [[ https://en.wikipedia.org/wiki/Thomas_Zurbuchen | Thomas Zurbuchen ]] Swiss-American, Associate Administrator for the Science Mission Directorate at NASA .p036 Bezos: "If you go to the moon first, and make the moon your home, you can get to Mars more easily" .Solar-grade silicon requires 99.9999% purity or better .[[ https://www.blueorigin.com/news/blue-alchemist-powers-our-lunar-future | Blue Alchemist ]] molten regolith electrolysis, 99.999% . [[ https://www.blueorigin.com/news/new-shepard-to-pause-flights | Blue Origin to Pause New Shepard Flights for No Less Than Two Years ]] .p036 "... if Bezos was worth $78B ... that would be like a parent with $78 in their pocket" . nonsense. If Bezos sold a few percent of his Amazon shares, the share price would plummet. .p037 Author grousing about delayed March 2 2017 article "An Exclusive Look at Jeff Bezo's Plan to Set Up Amazon-like Delivery for Future Settlement of the Moon", WP paywall .perhaps that delay fueled journalist author's seeming dislike of Bezos |
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.p038 "NO WHISKEY? NO BACON? NO THANKS" is a snarky anonymous sneer at Bezos' true statement that Mars, a dusty wasteland, is missing almost everything that Earth-dwellers take for granted. Bezos said that Mars is missing waterfalls, nature, blue skies, restaurants, friends, family, bacon, and whiskey. Antarctica is a garden paradise compared to Mars. “People haven’t really thought this through,” he said. .p039 Mars as Musk imagined it could be transformed: an Earth-like planet of blues and greens, even clouds, budding with life. . Illumination inverse-square function of distance, black body temperature inverse 4th power of energy flux, hence temperature inverse-square-root of distance. The Earth's black body temperature is 255K; it is warmer at the surface because Earth's thick insulating atmosphere, 287K. . Mars distance varies from 1.666 AU to 1.381 AU, hence top-of-atmosphere temperature will range from 255K/sqrt(1.666) to 255K/sqrt(1.381) or 198K to 229K, -75C to -44C. Those cold temperatures are why Mars retains its 0.6% earth pressure CO₂ atmosphere. A somehow-heated-to temperate atmosphere of lighter-molecule O₂/N₂ gas would soon boil away in the shallow (14% escape energy) gravity well of Mars. . Bezos is correct. Musk is smoking rope (or investor hopes and money). |
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Rocket Dreams
Musk, Bezos, and the Inside Story of the New, Trillion Dollar Space Race
Christian Davenport . Multco . 919.904 D2471r . 2025
- p001 Introduction
Part I: Earth, 2016-2018
p011 Ch.01 - "I Get This Angry Twice in a Year"
- p011 2017 March 1 Oscar - Manchester by the Sea
- p012 "study hall", 6 page document, 30 minutes reading
p014 Moon not cold dead rock, instead potential oasis, water in shadowed south pole craters
wp hydrates, est. 10 to 1000 ppm, 2025 PRIME-1 mission
- actually IM-2 mission, PRIME-1 payload of a drill and mass spectrometer ... failed landing, no useful data
p015 Pence National Space Council
p017 Shenzhou "Divine" capsule
p017 Shenzhou 5 mission claimed flawless, actually injurous gees
- p017 cleanup, fake second hatch opening
p018 Chang'e-1 mapped lunar surface
p018 Chang'e 3 lander 2023/12
- p023 Musk wanted for NASA Mars plan
- p025 Bezos wanted NASA Moon plan
p026 Ch.02 - Elon's Real Superpower
- p026 Musk taunts Bezos, Blue Origin not moving fast enough
- uh ... Gradatim Ferociter
- p026 2013 SpaceX granted right to lease Launch Complex 39A
- p027 Musk mantra focus on customers, not competitors
- yet it seems Davenport focuses on a "competition" with SpaceX already the winner
- p027 Amazon "Get Big Fast", compares 2016 Blue Origin 700 to (NASA funded) SpaceX with 5500
- p028 Blue Origin before 2016 bid as subcontractor, "from now go after SpaceX bids"
p029 Charles Miller "What can you do relative to the moon by 2020?"
p029 Brett Alexander
- p029 "Landing on the moon was far more difficult than landing on Earth"
- no, different, but easier with proper infrastructure. Earth escape energy is 63 MJ/kg, lunar escape velocity energy is 2.8 MJ/kg ... 22 times less energy to dissipate, with no atmosphere to constrain the solution. An "inverse launch loop" track could shed that lunar arrival kinetic energy in d=E/a distance; for acceleration a=20 m/s², d=140 km, time =. Decelerating a few incoming vehicles wouldn't pay for the track, but one vehicle per minute is half a million per year. A complex trajectory and traffic management problem, but staging hundreds of thousands of vehicles into multiple-cycle Hohmann loops, sorting vehicles into multiple "arrival runways" at multiple locations.
- p029 Bezos (born 1964) childhood heros were Apollo astronauts ... hmm. Apollo 11 to 17 was 1969 to 1972; how much would a 5 to 8 year old understand?
p030 New Shepard and "Very Big Brother" -> New Glenn
wp mentions New Glenn 7x2 followed by New Glenn 9x4 "as early as 2027". Launch Complex 36 also Vandenberg Space Launch Complex 9
p031 also a landing at Shackleton Crater at lunar south pole.
- p032 "I started Amazon just to feed my space habit"
p033 proposal 24 pages marked "Blue Origin Proprietary & Confidential"
p034 BE-7 engine using hydrogen extracted from south pole craters.
- I'm skeptical - how much will this plant weigh (including photovoltaics, and replacement parts?)
p035 Thomas Zurbuchen Swiss-American, Associate Administrator for the Science Mission Directorate at NASA
- p036 Bezos: "If you go to the moon first, and make the moon your home, you can get to Mars more easily"
- Solar-grade silicon requires 99.9999% purity or better
Blue Alchemist molten regolith electrolysis, 99.999%
Blue Origin to Pause New Shepard Flights for No Less Than Two Years
- p036 "... if Bezos was worth $78B ... that would be like a parent with $78 in their pocket"
- nonsense. If Bezos sold a few percent of his Amazon shares, the share price would plummet.
- p037 Author grousing about delayed March 2 2017 article "An Exclusive Look at Jeff Bezo's Plan to Set Up Amazon-like Delivery for Future Settlement of the Moon", WP paywall
- perhaps that delay fueled journalist author's seeming dislike of Bezos
p038 Ch.03 - Converting the Impossible to Late
- p038 "NO WHISKEY? NO BACON? NO THANKS" is a snarky anonymous sneer at Bezos' true statement that Mars, a dusty wasteland, is missing almost everything that Earth-dwellers take for granted. Bezos said that Mars is missing waterfalls, nature, blue skies, restaurants, friends, family, bacon, and whiskey. Antarctica is a garden paradise compared to Mars. “People haven’t really thought this through,” he said.
- p039 Mars as Musk imagined it could be transformed: an Earth-like planet of blues and greens, even clouds, budding with life.
- Illumination inverse-square function of distance, black body temperature inverse 4th power of energy flux, hence temperature inverse-square-root of distance. The Earth's black body temperature is 255K; it is warmer at the surface because Earth's thick insulating atmosphere, 287K.
- Mars distance varies from 1.666 AU to 1.381 AU, hence top-of-atmosphere temperature will range from 255K/sqrt(1.666) to 255K/sqrt(1.381) or 198K to 229K, -75C to -44C. Those cold temperatures are why Mars retains its 0.6% earth pressure CO₂ atmosphere. A somehow-heated-to temperate atmosphere of lighter-molecule O₂/N₂ gas would soon boil away in the shallow (14% escape energy) gravity well of Mars.
- Bezos is correct. Musk is smoking rope (or investor hopes and money).
p054 Ch.04 - On a Jihad
p070 Ch.05 - The Dark Side of Space
p083 Ch.06 - "I'll Say You're Fired in Two Minutes"
Part II: Earth Orbit, 2018-2020
p101 Ch.07 - Starman
p113 Ch.08 - Flying by Swipe
p128 Ch.09 - Question Everything
p144 Ch.10 - By Amy Means Necessary
p160 Ch.11 - Artemis
p177 Ch.12 - "We Just Blew It to Smithereens"
p195 Ch.13 - "Thank You for Flying SpaceX"
Part III: Beyond, 2020-2025
p215 Ch.14 - Super Hardcore
p231 Ch.15 - A Chinese Flag in the Lunar Soil
p246 Ch.16 - Can't Get it Up (to Orbit)
p265 Ch.17 - The Gremlins of Unknown Unknowns
p279 Ch.18 - Toxic, Limping, Abysmal
p296 Ch.19 - Corporate Alchemy
p319 Epilogue - Plant the Flag