re: The HST doesn't have a successor
The JWST isn't really the HST's successor as indeed it's about IR light while the HST is mainly about optical and ultraviolet wavelengths.
More, the JWST isn't going to be in LEO, nor is it launched or maintained by a manned spacecraft and it's only IR.
And it doesn't even look like the HST.
A very different philosophy from the HST!
