View Full Version : Discussion: NASA Approves Mirror for James ...

2003-Sep-11, 05:43 AM
SUMMARY: NASA announced today that it has selected a beryllium-based mirror technology for the 6.5 mirror on the James Webb Space Telescope - the successor to the Hubble Space Telescope. The primary mirror will actually be made up of 18 hexagonal-shaped segments, giving it 2.5 times more surface area than Hubble's mirror; but it will be one-third the weight. Construction of the mirror will begin next year, and the telescope is expected to launch some time after 2011.

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2003-Sep-13, 01:10 AM
I heard from the NASA site a while back that this telescope would have 10x the light gathering capability of Hubble. Is this correct? Would that mean it could peer 10x further?

2003-Sep-13, 02:28 AM
Fraser, could you please contact the makers of this mirror and tell them that the conversion between inches and millimeters is 1 inch = 25.4 mm? thanks. :D

2003-Sep-13, 04:25 AM
Wha? Did they do some bad conversions?

2003-Sep-13, 05:44 AM
no no ... that was the problem with the hubble mirror all those years ago I believe.