Portal:Astronomy/Picture/30 August 2005
< Portal:Astronomy | Picture
The Hubble Space Telescope's main mirror was accidentally ground incorrectly, resulting in a spherical aberration which severely degraded the image quality obtainable with the telescope. Space Shuttle mission STS-61 installed corrective optics on the telescope, the effect of which can be seen in these 'before and after' images of the spiral galaxy M100