Jupiter

Jupiter is the heavyweight planet of our system.[1]

History

Galileo Galilei's observations in 1610 mark the first detailed study of this planet.[2]

Findings

Ammonia and water clouds form the planet's bands, suspended in hydrogen and helium.[1] A planetary cyclone called the Great Red Spot exceeds Earth size and has persisted for centuries.[1] One complete spin takes roughly ten hours.[2] JPL lists a mean radius of 69911 kilometres for Jupiter.[3] ESA identifies Io among Jupiter's four large Galilean moons.[4]

Current status

The IAU has formally catalogued a count exceeding one hundred orbiting moons.[2]

Sources

  1. Jupiter | NASA. Licence: facts-only (Track B), no text or images reused. Attribution: NASA.
  2. Jupiter | NASA. Licence: facts-only (Track B), no text or images reused. Attribution: NASA.
  3. Planetary Physical Parameters | NASA JPL. Licence: facts-only (Track B), no text reused. Attribution: NASA/JPL-Caltech.
  4. Facts about Jupiter | European Space Agency. Licence: facts-only (Track B), no text reused. Attribution: European Space Agency.

Evidence as of 2026-11-01.