Virgo Cluster Distance from the
Tip of the Red Giant Branch


Virgo Cluster Elliptical

HST image of VCC 1104 in Virgo (9-hours with HST):

A small elliptical galaxy in the Virgo Cluster of galaxies is resolved into a multitude of stars for the first time. Measurements of the apparent brightness of these stars allows the distance of this galaxy to be measured, and thereby provides a calibration of the expansion age of the universe. PHOTO CREDIT: Indiana University and NASA/Space Telescope Science Institute.


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