Menu
News
All News
Dungeons & Dragons
Level Up: Advanced 5th Edition
Pathfinder
Starfinder
Warhammer
2d20 System
Year Zero Engine
Industry News
Reviews
Dragon Reflections
Columns
Weekly Digests
Weekly News Digest
Freebies, Sales & Bundles
RPG Print News
RPG Crowdfunding News
Game Content
ENterplanetary DimENsions
Mythological Figures
Opinion
Worlds of Design
Peregrine's Next
RPG Evolution
Other Columns
From the Freelancing Frontline
Monster ENcyclopedia
WotC/TSR Alumni Look Back
4 Hours w/RSD (Ryan Dancey)
The Road to 3E (Jonathan Tweet)
Greenwood's Realms (Ed Greenwood)
Drawmij's TSR (Jim Ward)
Community
Forums & Topics
Forum List
Latest Posts
Forum list
*Dungeons & Dragons
Level Up: Advanced 5th Edition
D&D Older Editions
*TTRPGs General
*Pathfinder & Starfinder
EN Publishing
*Geek Talk & Media
Search forums
Chat/Discord
Resources
Wiki
Pages
Latest activity
Media
New media
New comments
Search media
Downloads
Latest reviews
Search resources
EN Publishing
Store
EN5ider
Adventures in ZEITGEIST
Awfully Cheerful Engine
What's OLD is NEW
Judge Dredd & The Worlds Of 2000AD
War of the Burning Sky
Level Up: Advanced 5E
Events & Releases
Upcoming Events
Private Events
Featured Events
Socials!
Twitch
YouTube
Facebook (EN Publishing)
Facebook (EN World)
Twitter
Instagram
TikTok
Podcast
Features
Top 5 RPGs Compiled Charts 2004-Present
Adventure Game Industry Market Research Summary (RPGs) V1.0
Ryan Dancey: Acquiring TSR
Q&A With Gary Gygax
D&D Rules FAQs
TSR, WotC, & Paizo: A Comparative History
D&D Pronunciation Guide
Million Dollar TTRPG Kickstarters
Tabletop RPG Podcast Hall of Fame
Eric Noah's Unofficial D&D 3rd Edition News
D&D in the Mainstream
D&D & RPG History
About Morrus
Log in
Register
What's new
Search
Search
Search titles only
By:
Forums & Topics
Forum List
Latest Posts
Forum list
*Dungeons & Dragons
Level Up: Advanced 5th Edition
D&D Older Editions
*TTRPGs General
*Pathfinder & Starfinder
EN Publishing
*Geek Talk & Media
Search forums
Chat/Discord
Menu
Log in
Register
Install the app
Install
The
VOIDRUNNER'S CODEX
is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Community
General Tabletop Discussion
*TTRPGs General
Toril as a Counter-Earth
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Thomas Bowman" data-source="post: 7514134" data-attributes="member: 6925649"><p>You basically need an orbit with half the period of Earth's orbit, there is a tool for that, the Planet Orbit calculator</p><p><a href="http://www.calctool.org/CALC/phys/astronomy/planet_orbit" target="_blank">http://www.calctool.org/CALC/phys/astronomy/planet_orbit</a></p><p>Earth's orbit and year is 365.24 days long, half of that is 182.62 days. If you have an orbit with an average radius of 94,250,000 km or 58,564,000 miles the orbital period will be 182.62 days. Since the Earth orbits with an average radius of 93,000,000 miles, that means the perihelion, or the closest the spaceship gets to the Sun in this orbit which starts at Earth's distance from the Sun is 24,128,000 miles, for reference, Mercury gets as close to the Sun as 28,584,000 miles. Any spaceship that follows this orbital path will need a sunshade to keep the Sun from cooking it The sunlight this close to the Sun is 14.8567306 times as intense as it is from the Earth. A thin reflective solar shield in a vacuum should be enough to keep the ship cool for its human occupants. So the ship slows down from Earth orbital velocity, and falls towards the Sun in an elliptical orbit that takes 182.62 days, in which time both the Earth and Toril complete half an orbit. when the spaceship completes its orbit and returns to its starting position the two planets have switched places. This trip always takes 6 months as the planets are always in the same relative positions with respect to each other, so that makes the calculation rather simple.</p><p></p><p>I think the first mission will be one way, Toril doesn't have the infrastructure to build a launch tower, and to get back to Earth you would need not only the BFR upper and lower stages, but also a fuel module, and you would need a fuel plant and a power source, plus insulated tanks to store all the liquid methane that you would need to produce. You would launch the BFR into orbit, land the bottom stage, place fuel module on top, launch it again, refuel the BFR, and then head on your way back to Earth. Its much cheaper just to send the upper stage BFR on a one-way journey, and after its there, it could for a limited time be used to travel to other parts of the planet so long as fuel can be produced for it. A nuclear reactor is a bot problematic. On Mars, it doesn't really matter, just hide it behind a hill and stay away from it while its in operation, it is not well shielded, so radiation will be a problem on Toril, as there is an ecosystem that can be affected by it, while that is not the case on Mars. Perhaps solar panels can be brought along to power the electronics and keep open communications with Earth, and care packages can be sent over with spare parts for various equipment so they may be maintained by the crew.</p><p></p><p>For reference we launched the Mariner probe into an orbit like this, when it did a flyby of Mercury.</p><p></p><p></p><p><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/40/Mariner-10-Trajectory-first_half.PNG/800px-Mariner-10-Trajectory-first_half.PNG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Thomas Bowman, post: 7514134, member: 6925649"] You basically need an orbit with half the period of Earth's orbit, there is a tool for that, the Planet Orbit calculator [URL]http://www.calctool.org/CALC/phys/astronomy/planet_orbit[/URL] Earth's orbit and year is 365.24 days long, half of that is 182.62 days. If you have an orbit with an average radius of 94,250,000 km or 58,564,000 miles the orbital period will be 182.62 days. Since the Earth orbits with an average radius of 93,000,000 miles, that means the perihelion, or the closest the spaceship gets to the Sun in this orbit which starts at Earth's distance from the Sun is 24,128,000 miles, for reference, Mercury gets as close to the Sun as 28,584,000 miles. Any spaceship that follows this orbital path will need a sunshade to keep the Sun from cooking it The sunlight this close to the Sun is 14.8567306 times as intense as it is from the Earth. A thin reflective solar shield in a vacuum should be enough to keep the ship cool for its human occupants. So the ship slows down from Earth orbital velocity, and falls towards the Sun in an elliptical orbit that takes 182.62 days, in which time both the Earth and Toril complete half an orbit. when the spaceship completes its orbit and returns to its starting position the two planets have switched places. This trip always takes 6 months as the planets are always in the same relative positions with respect to each other, so that makes the calculation rather simple. I think the first mission will be one way, Toril doesn't have the infrastructure to build a launch tower, and to get back to Earth you would need not only the BFR upper and lower stages, but also a fuel module, and you would need a fuel plant and a power source, plus insulated tanks to store all the liquid methane that you would need to produce. You would launch the BFR into orbit, land the bottom stage, place fuel module on top, launch it again, refuel the BFR, and then head on your way back to Earth. Its much cheaper just to send the upper stage BFR on a one-way journey, and after its there, it could for a limited time be used to travel to other parts of the planet so long as fuel can be produced for it. A nuclear reactor is a bot problematic. On Mars, it doesn't really matter, just hide it behind a hill and stay away from it while its in operation, it is not well shielded, so radiation will be a problem on Toril, as there is an ecosystem that can be affected by it, while that is not the case on Mars. Perhaps solar panels can be brought along to power the electronics and keep open communications with Earth, and care packages can be sent over with spare parts for various equipment so they may be maintained by the crew. For reference we launched the Mariner probe into an orbit like this, when it did a flyby of Mercury. [IMG]https://upload.wikimedia.org/wikipedia/commons/thumb/4/40/Mariner-10-Trajectory-first_half.PNG/800px-Mariner-10-Trajectory-first_half.PNG[/IMG] [/QUOTE]
Insert quotes…
Verification
Post reply
Community
General Tabletop Discussion
*TTRPGs General
Toril as a Counter-Earth
Top