File:Hubble Images of Star Cluster Before and After Astronauts Fixed Hubble's Flaw (1993-10-99).jpg

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Captions

Captions

Right panel: Real image taken with the Wide Field/Planetary Camera-2 of a "globular duster" pinhole mask in the April 1993 WFPC2 Thermal Vacuum test at JPL (Pasadena, CA).

Summary[edit]

Description
English: Right panel: Real image taken with the Wide Field/Planetary Camera-2 of a "globular duster" pinhole mask in the April 1993 WFPC2 Thermal Vacuum test at JPL (Pasadena, CA). The image is a 80 sec exposure through the F555W ("V") filter about 40x34" on a side, and approximates closely what HST+WFPC2 should see in a few-orbit exposure after refurbishment on a distant globular cluster (like Omega Centauri, but up to 70x further away). This HST image has a resolution of ~0.10 (FWHM), or about 10x sharper than can be ordinarily achieved from the ground. Note the apparent lack of spherical aberration wings in the expected refurbished HST image, and that individual stars can now be distinguished for the first time down to the very cluster center. The faint cosmic-ray streak in the middle of the left edge shows that this is a real (WFPC2) CCD-image.
Date 17 June 1993 (upload date)
Source Hubble Images of Star Cluster Before and After Astronauts Fixed Hubble's Flaw
Author NASA Goddard Space Flight Center, Dr. J. Jeff Hester (Arizona State University), and the Wide Field Planetary Camera-2 Instrument Definition Team, Principal Investigator: Dr. John Trauger (JPL)
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Public domain This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.
The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag.

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