April 24, 1990Reputable sourceWell documented
Hubble opens its eye
On the timeline · around April 24, 1990 ·
What happened
The Hubble Space Telescope launched aboard Discovery; after a corrective-optics repair in 1993 it became the most productive telescope in history.
Why it matters
Deep fields, dark energy, exoplanet atmospheres — it rewrote astronomy and is still observing.
Sources
- NASA Science. Hubble Space Telescope (mission page) · Reputable source