Cosmic Distance Ladder
by Nasa/jpl-caltech
Title
Cosmic Distance Ladder
Artist
Nasa/jpl-caltech
Medium
Photograph - Photograph
Description
Cosmic distance ladder, conceptual image. Computer illustration representing the cosmic distance ladder - the method used to measure the expansion rate of the universe, as well as its size and age. The ladder is a series of stars and other objects within galaxies that have known distances. By combining these distance measurements with the speeds at which objects are moving away from us, scientists can calculate the expansion rate of the universe, also known as Hubble's constant.
Uploaded
August 8th, 2016
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