AST-470advanced

Gravitational Lensing, Redshift & Time Dilation: Advanced Connections

Curved spacetime changes the paths of light and the rates of clocks. These effects map dark matter, measure galaxy-cluster mass, discover exoplanets through microlensing, test relativity, correct navigation systems, and probe compact objects.

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

advanced58 minFact checked

Gravitational Lensing, Redshift & Time Dilation: Advanced Connections

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

Knowledge map

See where this idea fits.

←

Before this

Prerequisites

AST-469Gravitational Lensing, Redshift & Time Dilation: Observation, Measurement & Evidence→

→

After this

Builds toward

AST-471Experimental Tests of Relativity: Foundations→

Evidence first

Verified knowledge behind the lesson.

How verification works →

Curved spacetime changes the paths of light and the rates of clocks.

supported

Photons follow null geodesics through curved spacetime.

supported

Solar-eclipse and radio observations confirm light deflection, galaxy clusters produce dramatic gravitational arcs, atomic clocks show gravitational time shifts over small height differences, and compact-star spectra can exhibit gravitational redshift.