Exoplanet detection methods

Layer 1 — Physicsin the Astrophysics subtree

Radial velocity (Mayor-Queloz 1995 Nobel 2019), transit (Kepler, TESS), direct imaging, microlensing, astrometry. >5000 confirmed; habitable-zone rocky planets common.

Related concepts

Stellar structure equations
Transit geometry: dip depth δ = (R_p/R_s)²; duration ∝ R_s/v_orb
Radial-velocity K ∝ m_p sin i / M_s^{2/3}: stellar Doppler wobble
T_eq = T_s · √(R_s/(2a)) · (1−A)^{1/4}: blackbody energy balance
Transit depth R_p/R_s = 1/10 ⇒ δ = 1/100; Earth/Sun ratio 10,000

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