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Interplanetary Portals vs Gravity
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How do you measure time on a tide locked planet?
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A problem with interstellar travel
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How could you see an image without photons? (imaging systems)
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Can anyone provide suggestions for a book on prose-writing?
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Can comets create a microclimate crater on Mars 30km deep with 0.7bars?
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Protagonist wants to meet his exact clone
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The interior design of the central trunk of a ring spaceship
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Vanishing Pencil: Math/Physics Mystery from High School Teacher
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Force Field Experiments: Realistic Physics Questions
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At what speed can a person jump in zero g?
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Wall thickness of ring habitats for radiation shielding
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Optimizing Atmospheric Entry Speed in Space Games
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Sandy Hill Plunge: A Lifted Bronco's Free-Fall
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Why do we need FTL if traveling at the speed of light is instantaneous?
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Sapient Life Indigenous to a Planet Orbiting a Red Dwarf
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Ideas for novel I'm writing I would love some insight on a concept
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Structure of the Galaxy: 6 Questions Confirmed
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Number of Decks on a Rotating Habitat
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Writing: Input Wanted Black holes as weapons - easy way to calculate the evaporation blast
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Writing: Input Wanted A dangerous space mission that requires a lot of helping hands
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Docking spaceships to ring habitats
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Exploring Military SF: Realistic Energy Shields
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If you are moving in a ship at FTL, could a pilot react at FTL?
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Could Localised Variations in Physics Occur?
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Let's build a quantum radio receiver
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Seeking a nerd well-versed in Cosmology and Dungeons & Dragons
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Scott Manley's Video: Pulsed Rocket Drives
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Wood as a precious resource on spaceships
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Too Much Stellar Flux: Fixing a 25-year old Problem
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A mind excercise inside videogames
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Conditions inside a protoplanetary disc
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Aftermath of a collision with an ice giant
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Writing: Input Wanted Generation Ship SFV Exodus: Revised Designs
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Writing: Input Wanted Captain's choices on colony ships
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Hiding an orbital colony 'behind' a planet from a flare star
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Writing: Input Wanted Does this sound like a rip off of Halo?
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Theoretical question about a new Energy and implications of using it
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Writing: Input Wanted Are Clone Ships a Better Alternative for Space Colonization?
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Writing: Input Wanted Building a Generation Ship: The SFV Exodus
2
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Writing: Input Wanted Different Cosmic Disasters for Different Plot Points
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Uncovering a Faked War: Exploring Infowar in 2094
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Does anyone know of a good, searchable Universe visualizer?
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Writing: Input Wanted Help needed comparing planetary "calendars"
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Is it Appropriate to Include More Than One Prose-Dialogue Pair in Each Block?
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Writing: Input Wanted USS Enterprise Hit by Ancient Interstellar Probe - Investigation Report
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Is Kindle X-ray Worth the Extra Work for Authors and Readers?
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Is a Self-Building 'Seed' Ship the Future of Space Travel?
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Good gas to trace lasers in a vacuum
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Previously suppressed knowledge to control the masses
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Atmospheric pressure inside a protoplanetary disc
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Change Speed of Light: Explaining a Device in Sci-Fi Comedy
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Writing: Input Wanted Best material for heat exchanger on a space ship
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Scientific-sounding gobbledygook found by trolling PF posts
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Walking around the ring on a spinning space station
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  • Poll Poll
Writing: Input Wanted Cliffhangers in Fiction: Do Readers Prefer Hard or Soft Endings?
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What would you do if you thought you'd found a portal?
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Maximum safe mass of an asteroid in geostationary orbit
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Photon and Neutrino detector and photon trawl device
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Description of a nuclear EMP event
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High-Tech Knight: Best Equipment for Elite Warriors
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Colors of Alien Blood: Oxygenation Chemistry Explained
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Traveling to alternate universes
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Centaur Mass for Jupiter's 4th Lagrange Point
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Effects of a rapidly developing, unknown nearby civilization
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How would Dr. Frankenstein solve the tissue rejection problem?
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What Biomechanical Insights Can Alien Polysaccharides Offer?
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How to get away with killing your great grandfather with time travel
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A PF SciFi story One sentence at a time....
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Supermassive black hole in the Large Magellanic Cloud?
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Can any object cause fluctuations in a magnetic field?
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Orbiting, Relativity and Mind-effects
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Sci-fi writer in need of futuristic Quantum Physics ideas
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Can a Palladium Foam Parachute Slow Down a Spaceship Traveling at 0.4c?
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Experiments to do in deep space at 40% of c
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Black Holes & Life: Myth or Reality?
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Levels of Civilization Based on Deuterium
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Can Simplified Spacetime Analogies Work in Sci-Fi?
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Writing: Input Wanted How to model Eccentricity, Obliquity and Recession in Excel
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Will tissue engineering make humanoid fabrication possible?
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Writing: Input Wanted What is the concept of 'residual self image' in The Matrix?
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Can I Write a Book About the Physics of Batman without Getting Sued?
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Theoretical question about the Sun
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Writing: Input Wanted How to keep from being overrun with liches
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Trying to make a rigorous imaginary world
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Turning oxygen into fluorine in our atmosphere
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Gravity, heat, flooding, and centrifugal force on a tidal-locked planet
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What Are the Possible Connections Between Magnetic Monopoles and Acupoints?
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Is a play script the right format?
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Stability of Polar Solar Orbits: Can a Planet Change its Host Star?
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How would one publish a non-mathematical theory?
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Could large organisms on a nutrient-poor world be inflatable?
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Closing the writing loop, again with thanks
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Superman-Inspired Skinsuit: Capable of 4,000mph & 500Gees
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Open Titanium Case w/ Steel Pins: Advice Needed
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Can Flying Ships Defy Inertia and Make Instant 90-Degree Turns?
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Tethered aircraft lifting power, low gee world
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  • Poll Poll
SF code cracking vs real mathematics
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Is it possible to move a black hole?
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20
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Writing: Input Wanted Building a Sci-Fi Fantasy Solar System & Planet
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