AST-578intermediate

Transit Photometry: Physical Mechanisms

Transit photometry detects an exoplanet when it crosses the face of its star and blocks a measurable fraction of starlight. Transits measure planetary radii, orbital periods, system geometry, atmospheric spectra, and population statistics.

Review statusgreen

Review cycle365 days

Last reviewedNot yet

Start lesson See what connects to this

Learn this concept

Turn the idea into understanding.

1 published lesson

intermediate48 minFact checked

Transit Photometry: Physical Mechanisms

Open the full lesson, review the evidence, and complete the knowledge check.

Knowledge map

See where this idea fits.

←

Before this

Prerequisites

AST-577Transit Photometry: Structures & Vocabulary→

→

After this

Builds toward

AST-579Transit Photometry: Observation, Measurement & Evidence→

Evidence first

Verified knowledge behind the lesson.

How verification works →

Transit photometry detects an exoplanet when it crosses the face of its star and blocks a measurable fraction of starlight.

supported

For a small dark planet crossing a uniformly bright star, the fractional light loss is approximately the square of the radius ratio.

supported

Kepler and TESS have detected thousands of repeating transit signals.