1. https://en.wikipedia.org/wiki/History_of_the_telescope.
2. Center for History of Physics, American Institute of Physics (AIP), 2023, https://history.aip.org/exhibits/cosmology/tools/tools-first-telescopes.htm.
3. Telescopes in History;Bond,2001
4. Glass: The Final Frontier;Eichhorn,2022
5. https://science.nasa.gov/mission/hubble/overview/hubble-timeline/.