Globular Cluster Age: White Dwarf Ages in M4

About this video
Duration: 40 seconds

NASA's Hubble Space Telescope has found the oldest burned-out stars in our Milky Way Galaxy. These extremely dim and old "clockwork stars" provide a completely independent reading of the age of the universe. By measuring the temperature of white dwarf stars in a globular star cluster, astronomers can estimate their ages. Hubble's sensitive detectors came up with an age of 12 to 13 billion years, dovetailing nicely with other independent measurements placing the universe's age at 13 to 14 billion years.

Globular Clusters, Scientific Visualizations, Star Clusters, Stars, Universe Age/Size, White Dwarfs


NASA and G. Bacon (STScI)

Publication: April 24, 2002

Learn more about this video in NewsCenter

HubbleSite's NewsCenter is the place to find the story behind this video, along with its original news release and all related material.
Download Options
MPEG-4 (H.264)