Some concepts for a future large IR/O/UV space telescope include a James Webb Space Telescope (Webb) style sunshade for thermal stability. This will bias the telescope cold and complicate one key advantage that a 6m high-contrast imaging telescope could have: operating and testing at room temperature. Early concepts of LUVOIR-B, a segmented, off-axis 8-meter aperture concept developed the Large Mission Concept Study Teams, predict more than 5kW of heat would be needed to bring the telescope to operating temperature. These room-temperature telescopes invite configurations that could take more advantage of solar heating. This paper explores architecture options and identifies some technologies, their maturation requirements, and risks.
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