Observational Astrophysics: Distance, Flux, Transits, and Spectra Step by Step
A lightweight execution-visualization book.
Parallax and Flux Ledgers
Parallax Index Inverts to Distance
Smaller Parallax Means Farther Source
Luminosity Spreads by Distance Square
Transit Depth from Radius Ratios
Radius Ratio Squares to Depth
Larger Planet Makes Deeper Transit
Same Depth Needs the Same Radius-Ratio Source
Spectral Shifts and Signed Motion
Receding Source Redshifts the Line
Approaching Source Blueshifts the Line
Double Speed Doubles the Shift Ratio
Period Ratios and Observation Audit
Period Square over Radius Cubed Matches
Wrong Period Square Breaks the Ratio
Observational Audit Cites Every Source
Relation Cross-Scans
Parallax Distance Inverse Cross-Scan
Luminosity Distance Flux Cross-Scan
Transit Radius Depth Cross-Scan
Doppler Sign Shift Cross-Scan
Period Ratio Acceptance Cross-Scan
Boundary and Invariant Scans
Flux Constant Output Three-Row Scan
Period Law Source Three-Row Scan
Period Law Mismatch Three-Row Scan
Transit High-Ratio Square Three-Row Scan
Doppler Approach Scaling Three-Row Scan