Which bodies are included?

All eight planets — Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune — plus three dwarf planets: Pluto, Ceres and Eris. Mass and surface gravity are given relative to Earth, where Earth equals 1.

Why is Pluto a dwarf planet?

In 2006 the International Astronomical Union defined a planet as a body that orbits the Sun, is rounded by its own gravity and has cleared its orbital neighbourhood. Pluto meets the first two tests but shares its region with many Kuiper Belt objects, so it is classed as a dwarf planet.

How is weight on another planet calculated?

Weight is mass times surface gravity, W = m × g. Your mass stays constant, so your weight scales by the planet's surface gravity relative to Earth. On Jupiter at about 2.36 g you weigh roughly 2.36 times your Earth weight; on Pluto at about 0.06 g, far less.

Which planet has the most moons?

Saturn currently leads with well over a hundred confirmed moons, narrowly ahead of Jupiter. Moon counts keep rising as surveys find more small satellites, so published totals change over time.

Are these figures exact?

They are accurate reference values rounded for readability. Orbital periods, radii and especially moon counts come from current astronomical data and are revised as measurements improve and new moons are discovered.

Solar System Planet Data Reference

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The solar system at a glance

This reference gathers the key numbers for the eight planets and three notable dwarf planets: mass and surface gravity relative to Earth, equatorial radius, orbital period and confirmed moon count. A sortable view lets you rank them by any property, and a weight calculator shows what you would weigh on each world.

How it works

The bodies are ordered by your chosen property. The weight calculator applies the simple relation:

weight_elsewhere = your_Earth_weight × surface_gravity_relative_to_Earth

Surface gravity relative to Earth ranges from about 0.06 on Pluto to 2.36 on Jupiter, so the same person can weigh a small fraction of their Earth weight on a dwarf planet yet more than double it on a gas giant. Mass and gravity are expressed with Earth set to 1 for easy comparison.

Tips and notes

Mass and gravity are relative to Earth = 1; radius is in kilometres.
Jupiter is the most massive planet at about 318 Earth masses.
Your mass never changes — only your weight, which tracks surface gravity.
Moon counts rise over time as new small satellites are confirmed.
Pluto, Ceres and Eris are dwarf planets, not full planets, since 2006.