All These Worlds – Space
Pick a section to explore. .
Fundamentals
Intro to Space Flight
Foundations, variables, orbits, references
Stellar Neighbors
50 Nearest Stars
Fifty closest stars or stellar objects, distances, coordinates, spectral classes
Calculator
Habitable Zone Calculator
How to Calculate Habitable Zone Ranges
Hohmann Transfers
Let’s Go to Mars!
Calculate a Hohmann transfer between Earth and Mars, both outbound and return.
OBAFGKM
Stellar and Sub-Stellar Classes
What each class means physically, typical effective temperature ranges, and real examples.
Layers of the Sun
Layers of the Sun
Downloadables, checklists, and practical templates you can use immediately.
Collisionless Plasma
The Solar Wind
Measuring the solar wind and how it changes over time.
Propulsion in Space
Space Engines
Engine types, terminal velocity, feasibility.
Can Venus be saved?
Terraforming Venus
Chemical Reactions, System Constraints, and Resource Pathways
Distant Worlds
Known Exoplanets
Super-Earths, hot Jupiters, and habitability
