A cosmic magnifying glass: What is gravitational lensing?

Gravitational lensing is a powerful tool for telescopes such as the James Webb Space Telescope as it images some of the most distant and faint early galaxies.

A cosmic magnifying glass: What is gravitational lensing?
Gravitational lensing is a powerful tool for telescopes such as the James Webb Space Telescope as it images some of the most distant and faint early galaxies.