The El Gordo galaxy cluster is big. How big is it? It's so big that it would take 3,000 Milky Way galaxies to equal its mass. It's so big that it weighs as much as 3 quadrillion suns. It's so big that a 2012 estimate said it was massive, and then a 2014 estimate said no, it's nearly twice that massive.
El Gordo In 60 Seconds
Take a tour of this massive galaxy cluster.
How Galaxies Interact
Take a look at the many galaxies Hubble has imaged for its 18th anniversary.
How To Find A Galaxy
How do astronomers even begin to map the universe?
Written by Ashley Hamer December 2, 2016
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