You have to weigh it against the very finite budget of space programs. NASA does this as their decadal surveys. There is no shortage of ideas and serious concep

You have to weigh it against the very finite budget of space programs. NASA does this as their decadal surveys. There is no shortage of ideas and serious concepts. The difficulty of putting Hubble or JWST sized telescopes in orbit of other plants is immense. They need constant maintenance as well and will take years to reach their intended targets. B612/Sentinel has been "in the works" for at least 8 years, but still doesn't have consistent funding. This would be in a Venutian orbit to looks for near Earth objects. https://en.wikipedia.org/wiki/Sentinel_Space_Telescope https://en.wikipedia.org/wiki/Sentinel_Space_Telescope IMHO, a more useful location for a space telescope rather than in orbit around another planet would be phased 6 months off of Earth at 1 AU. This would let us continuously observe the "sun side" of space.