Gravity & orbital dynamics
Use motion to infer masses, potentials and the dynamical structure of stars, planetary systems, galaxies and clusters.
Side 189Side Studies / Research
Subject
Astrophysics
Purpose
Astronomical objects studied through gravity, radiation, nuclear processes, fluid dynamics and observations across the electromagnetic spectrum.
Structure
05 movesMechanism mapV0
Entities → interactions → mechanisms → scales → measurement
Infer physical processes from distant light and motion.
Astrophysics turns remote observations into physical models by combining dynamics, radiation, nuclear physics and statistical inference across enormous scales.
Radiation & spectra
Read temperature, composition, velocity and magnetic fields from emitted and absorbed radiation.
Stellar structure & evolution
Connect hydrostatic balance, energy transport and nuclear burning to stellar lifecycles.
Compact objects & extremes
Study white dwarfs, neutron stars and black holes where density, gravity and relativistic effects become dominant.
Galaxies & large-scale environment
Relate star formation, gas, dark matter and interactions to the evolution of galaxies within cosmic structure.
Keep the boundaries visible.
These separations prevent nearby ideas from collapsing into one another before the subject is understood.
brightness ≠ luminosity
spectrum ≠ composition alone
mass estimate ≠ direct weighing
Questions that organize the Side.
Use these to test whether the model is becoming explanatory rather than merely familiar.
How can different observations constrain the same hidden physical property?
Which stellar properties are robustly inferred from spectra and which depend strongly on models?
How do local astrophysical processes connect to cosmological initial conditions?
What should carry weight here?
Require instrument calibration, distance assumptions, selection effects and model degeneracies to accompany inference from remote observations.