James Webb

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James Webb

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1richardbsmith
gen. 14, 2010, 4:54pm

Here is recent release about James Webb and planet searching.

http://science.nasa.gov/headlines/y2010/14jan_planetsafari.htm?list1361091

2richardbsmith
juny 18, 2010, 7:45am

A help from NASA on comparing Webb and Hubble.

http://www.nasa.gov/externalflash/webb_hubble/

Bad Astronomy provided the link.

BA wrote, "Hubble is an awesome ’scope, but its life is limited. Heavy and huge, there’s no way to bring it back, and with the Shuttle retiring there’s no easy way to get to it. Eventually its gyros will fail, it won’t be able to be pointed, and then that’s that. "

What are the maintenance access plans for Webb?

3richardbsmith
juny 18, 2010, 8:00am

From comment #26 in the BA link:

"Now think about the JWST. Once it launches, that’s it. No fixes, no new experiments. No manned fix-it missions. Maybe robotic fix-it missions, less capable than manned missions, but then, probably not, unless there’s a real disaster.

Think about what the HST is doing now, that the original designers never thought of, or didn’t have technology to implement. No wonder the JWST only has a mission profile of 5 to 10 years. It’ll be obsolete and irreparably broken after that."

In other words there are no maintenance plans for Webb. I hope the mirror is ground correctly.