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The Hubble Space Telescope (HST) is a space telescope in low Earth orbit with a 2.4 meter main mirror capable of observing near ultraviolet, visible, and near infrared light. It was launched in 1990 and remains in operation (following five servicing missions) as of 2015.

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Why are so many space telescopes placed in LEO instead of at Lagrange Points? And why do we ...

To add to the existing good answer about the practicalities of launching to Lagrange points, it's also worth considering why the missions which have gone that far are using the unstable Lagrange point …
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