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John Spencer

7.02

Good

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Astronomer Modern Observational Planetary Pluto Moons

description John Spencer Overview

John Spencer is a planetary scientist at Southwest Research Institute, noted for studies of Io's volcanism and work on NASA's 2015 New Horizons Pluto flyby.

insights Why this score

John Spencer ranks #261 of 360 in the Astronomer ranking, behind Edward Maunder, ahead of Otto Struve.

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How good is John Spencer?

John Spencer scores 7.02/10 (Good) on Lunoo, making it a well-rated option in the Astronomer category.

What are the best alternatives to John Spencer?

See our alternatives page for John Spencer for a ranked list with scores. Top alternatives include: Scott S. Sheppard, Katherine de Kleer, Imke de Pater.

How does John Spencer compare to Scott S. Sheppard?

See our detailed comparison of John Spencer vs Scott S. Sheppard with scores, features, and an AI-powered verdict.

Is John Spencer worth it in 2026?

With a score of 7.02/10, John Spencer is a solid option in Astronomer. See all Astronomer ranked.

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