The story
stubby + Hubble. From being a telescope similar to the Hubble Space Telescope (HST), with a shortened tube (ie. a stub). The HST itself is named after American astronomer Edwin Hubble.
Etymology from Wiktionary, CC BY-SA 4.0.
stubby Hubble
Today it means: A spy satellite with a design similar to the Hubble Space Telescope. Full definition →