1. MIRROR COMPARISON
QuickTime

• High Res – 2017 Version (27.9 MB)
• Low Res – 2017 Version (2.8 MB)
• High Res – 1999 Version (12.7 MB)
• Low Res – 1999 Version (2.9 MB)

MPEG

• High Res – 2017 Version (9.5 MB)
• Low Res – 2017 Version (7.0 MB)
• High Res – 1999 Version (5.5 MB)
• Low Res – 1999 Version (3.9 MB)

X-rays that strike a mirror head-on are absorbed. X-rays that hit a mirror at grazing angles are reflected like a pebble skipping across a pond. Thus, X-ray telescope mirrors are shaped like barrels rather than dishes.
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(Animation: CXC/D.Berry) - View Still Photos