NASA engineer Ernie Wright looks on as the first six primary mirror segments for the James Webb Space Telescope are prepped to begin final cryogenic testing at NASA's Marshall Space Flight Center.
David Higginbotham / NASA
The successor to the Hubble Space Telescope is facing cost overruns and years of delay before it launches, but that hasn't dampened the enthusiasm of scientists who are meeting in Baltimore this week to talk about the amazing research they want to do with the James Webb Space Telescope.
From National Public Radio
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