description OAO-2 Overview
NASA Orbiting Astronomical Observatory 2, launched in 1968, the first successful space-based ultraviolet telescope, providing early UV observations of stars and nebulae.
insights Why this score
OAO-2 ranks #70 of 101 in the Spacecraft ranking, behind ERS-2, ahead of Vostok 3.
First successful space ultraviolet telescope, important astronomy precursor though less famous today.
help OAO-2 FAQ
How good is OAO-2?
OAO-2 scores 7.75/10 (Good) on Lunoo, making it a well-rated option in the Spacecraft category. First successful space ultraviolet telescope, important astronomy precursor though less famous today.
What are the best alternatives to OAO-2?
See our alternatives page for OAO-2 for a ranked list with scores. Top alternatives include: IUE (International Ultraviolet Explorer), IRIS (Interface Region Imaging Spectrograph), Mercury Friendship 7.
How does OAO-2 compare to IUE (International Ultraviolet Explorer)?
See our detailed comparison of OAO-2 vs IUE (International Ultraviolet Explorer) with scores, features, and an AI-powered verdict.
Is OAO-2 worth it in 2026?
With a score of 7.75/10, OAO-2 is a solid option in Spacecraft. See all Spacecraft ranked.
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