Compose a new way to ask the same question. The new question must be asking the exact same thing as the original question does. Without any other information, you should be able to tell that the original question and the new question are the same. Preserve bracketed phrases in your new question. You can change the rest of the question provided the above requirements are satisfied. The new question must have a natural, fluent formulation, as if it were composed by a native English speaker. You will be given three pieces of information to help you create better questions. Those are: "Answer": the answer to the question, e.g., "Honolulu". "Answer Type": the type of the answer, e.g., "Location". "Auxiliary Information" is a detailed description of some concepts mentioned in the question, if any.

original question: Which astronomical observatory discovered [11675 Billboyle]?
answer: b√©doin observatory
answer type: Astronomical Observatory.
[11675 Billboyle] was discovered by which astronomical observatory?

original question: what Patent has an Associated Invention that is associated with the patent [Multidimensional digital waveguide signal synthesis system and method (tetrahedral extension)]?
answer: multidimensional digital waveguide signal synthesis system and method
answer type: Patent.
auxiliary information: This variation on the Digital Waveguide Mesh design comprises bidirectional unit delays and 4-way no-multiply junction computations to model wave propagation in 3D space or homogenous solids.  It is based on an equivalence under certain conditions of modeling of transmission line scattering as digital waveguides and partial finite difference schemes for 3d wave propagation.
Which patent is associated with [Multidimensional digital waveguide signal synthesis system and method (tetrahedral extension)]?

original question: Which telescope type has the telescopic principle of [Spherical reflector]?
answer: radio telescope
answer type: Telescope type.

Name the telescope type which has the telescopic principle of [Spherical reflector].