This NASA/ESA Hubble Space Telescope image shows a globular cluster known as NGC 104 - or, more commonly, 47 Tucanae, since it is part of the constellation of Tucana (The Toucan) in the southern sky.
This is the first image of a celestial object taken with the newly repaired Advanced Camera for Surveys (ACS). The camera was restored to operation during the STS-125 Servicing Mission to upgrade the NASA/ESA Hubble Space Telescope.
This image is the largest image ever taken with Hubble's WFPC2 camera. It was assembled from 24 individual exposures taken with the NASA/ESA Hubble Space Telescope and is the highest resolution image of the entire Crab Nebula ever made.
Nerve cells (yellow) that make up a heart's brain cluster around the top of this reconstructed rat heart, near where blood vessels enter and exit the organ. Other colors show the contours of distinct heart areas, such as the left atrium (green), right atrium (teal), left ventricle (blue) and right ventricle (purple).