News Release Archive:

News Release 14 of 54

September 28, 2006 01:00 PM (EDT)

News Release Number: STScI-2006-47

Hubble Discovers Dark Cloud in the Atmosphere of Uranus

Technical facts about this news release:

About the Object
Object Name: Uranus
Object Description: Planet
Distance: The semi-major axis of Uranus's orbit about the sun is 19.18 Astronomical Units (A.U.) or roughly 2.9 billion km.
Dimensions: Uranus (without rings) has a diameter of roughly 32,000 miles (51,000 km) at the equator.
About the Data
Data Description: This image was created from HST data from the following proposal 10805: PI: L. Sromovsky (University of Wisconsin, Madison), H. Hammel (Space Science Institute), and K. Rages (SETI Institute).
Instrument: ACS/WFC
Exposure Date(s): August 23, 2006
Filters: F550M (550nm), F658N (658nm), and F775W (775nm)
About the Image
Image Credit: NASA, ESA, L. Sromovsky and P. Fry (University of Wisconsin-Madison), H. Hammel (Space Science Institute), and K. Rages (SETI Institute)
Release Date: September 28, 2006

This image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope. Three filters were used to sample several wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:

F550M (550nm) blue
F658N (658nm) green
F775W (775nm) red


Orientation/Scale: Uranus and Dark Spot - August 23, 2006