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Everything posted by DDE
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Is hyperfission an easier goal than fusion?
DDE replied to Spacescifi's topic in Science & Spaceflight
...and such systems are also quite handy for fusion energy conversion. Artzimovich looked at MHD coils from the day he built his first crude fusors. The issues are in the boardrooms, not reactor cores. You're not!? -
Is hyperfission an easier goal than fusion?
DDE replied to Spacescifi's topic in Science & Spaceflight
GA-9005 has charts for that. The safe zone is actually further north. Oh, and the Chinese would thank you for preventing millions of cancer cases through additional exposure. They're sitting on a major study indicating radiation hormesis, one that even had a control group. You got a reaction to go with that claim? -
What trans-human modifications would you make?
DDE replied to farmerben's topic in Science & Spaceflight
I think, therefore I am... AM. -
What trans-human modifications would you make?
DDE replied to farmerben's topic in Science & Spaceflight
Why just one robot? What’s our budget anyway? -
totm dec 2019 Russian Launch and Mission Thread
DDE replied to tater's topic in Science & Spaceflight
Direct ascent with two LEO tankers and the Soyuz flying on the R-7. -
For Questions That Don't Merit Their Own Thread
DDE replied to Skyler4856's topic in Science & Spaceflight
Not twisted ribbons? -
Several helium-water compounds predicted at ice giant conditions. https://www.phys.org/news/2019-07-unveils-superionic-states-helium-water-compounds.html I can’t believe middle school lied to me
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totm dec 2019 Russian Launch and Mission Thread
DDE replied to tater's topic in Science & Spaceflight
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And is that a showstopper?
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totm dec 2019 Russian Launch and Mission Thread
DDE replied to tater's topic in Science & Spaceflight
*Raises hand* -
@Spacescifi, you can ditch the FTL sensors entirely. Pulsars are considered sufficiently reliable for navigation purposes as a galaxy-wide GPS with accuracy of ±5 km; there is an experimental implementation that has showed 7 km accuracy after two days of observations.
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Humanity cannot hide from radio transmitting civilizations
DDE replied to farmerben's topic in Science & Spaceflight
@farmerben, that assumes the recipients would be able to decipher the improvised message - or they would even care what the message is besides evidence of sentient life and hence a potential threat. -
totm dec 2019 Russian Launch and Mission Thread
DDE replied to tater's topic in Science & Spaceflight
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Because the “hardness” level of sci-fi tends to be wildly inconsistent, both because of undereducated authors and because of the need to pander to an even less educated audience. The proliferation of the desire for “hardness” and “grit” however causes authors to still implement what isolated elements they know of and can employ - while often ignoring the more glaring problems. For example, BSG has a compromise version of sound in space and has heard of Newtonian maneuvering, but employs it inconsistently and doesn’t let it have effect on ship design.
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totm dec 2019 Russian Launch and Mission Thread
DDE replied to tater's topic in Science & Spaceflight
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I’ve tried using Imgur. Unfortunately it has a tendency to ignore the order in which I upload images.
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Technical question! How to efficiently capture and upload screenshots without Steam? Stopover points are pretty much a non-starter in spaceflight, and the marginal dV increase needed to directly reach certain destinations directly are quite tolerable. Thus interruptible trade routes are difficult to arrange.
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Apparently some detection ability has apparently been shown in humans. And it's at energy levels lower than those that, uh, permanently destroy your eyes and fry most of your internal organs.
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@Spacescifi As always I’ll refer this discussion to http://www.xenology.info/Xeno/13.5.htm first.
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Amateurs play economics. Professionals grease paws.
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Hello and welcome to the forum, @CosmosGamer99. You may wish to note that this thread is four years old, and some of the people here who are getting notifications from you may be a bit annoyed. Not sure where you found the discussion on propellant, someone simply erroneously cited the Nedelin disaster.
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totm dec 2019 Russian Launch and Mission Thread
DDE replied to tater's topic in Science & Spaceflight
Spektr-RG scrubbed again. Zak has also seen hints that Soyuz-2.1v carried an ASAT payload. -
Not yet we don't... but it's the next stop for Venus probe design. Venera-D uses a Soviet-style pressurized hull but it's also supposed to plant an unpressurized science package with nearly unlimited longevity.
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Then leave the refrigerator behind. If we built a drill for Venus, we should be able to manage a simple engine cycle. Tank pressurization can be made to keep up with atmospheric pressure to keep certain propellants liquid even at ambient temperatures. Heck, the propellant could act as a heat sink even if the compensator valves let in atmospheric gas. The souposphere should allow easy aerodynamic landing even for truly obscene payloads.
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Apparently it's pretty crazy.