What process ensured the Hubble Space Telescope maintained cutting-edge scientific output across several decades?

Answer

Multiple service missions performed by astronauts to install new instruments and execute necessary repairs.

A crucial factor in the HST's prolonged scientific success, extending its utility far beyond initial expectations, was its unique serviceability. Because it was placed in orbit rather than being thrown away after launch, astronauts visited the telescope on several occasions. These crucial servicing missions allowed for the installation of newer, more advanced scientific instruments to replace older ones, as well as performing essential maintenance and repairs. This sustained program of technological refreshment ensured that the data collected remained on the cutting edge of astronomical capability, continuously refining the foundational measurements established by Edwin Hubble.

What process ensured the Hubble Space Telescope maintained cutting-edge scientific output across several decades?

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