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Graph showing relative strength of Mercury's magnetic field. Despite its small size and slow 59-day-long rotation, Mercury has a significant, and apparently global, magnetic field. According to measurements taken by Mariner 10, it is about 1.1% the strength of Earth's. The magnetic-field strength at Mercury's equator is about 300 nT.
Parts-per-million chart of the relative mass distribution of the Solar System, each cubelet denoting 2 × 10 24 kg. This article includes a list of the most massive known objects of the Solar System and partial lists of smaller objects by observed mean radius. These lists can be sorted according to an object's radius and mass and, for the most ...
People think Earth is big, then Jupiter is quite a bit bigger, then the Sun's a bit bigger than that - but when you realise the Sun would be about 2 pixels square in the last image the mind boggles. — Vanderdecken ∴ ∫ ξ φ 12:19, 17 February 2009 (UTC) [ reply ]
Relative masses of the terrestrial planets of the Solar System, and the Moon (shown here as Luna) The inner planets (sizes to scale). From left to right: Earth, Mars, Venus and Mercury. The Solar System has four terrestrial planets under the dynamical definition: Mercury, Venus, Earth and Mars.
The following outline is provided as an overview of and topical guide to Mercury: Mercury – smallest and innermost planet in the Solar System. Its orbital period (about 88 Earth days) is less than any other planet in the Solar System. Seen from Earth, it appears to move around its orbit in about 116 days.
On the assumption that craters of similar size and morphology are roughly the same age, it is possible to place constraints on the ages of other underlying or overlying units and thus to globally map the relative age of craters. Mercury's Caloris Basin is one of the largest impact features in the Solar System.
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Mercury has an observed magnetic field, which is believed to be generated within its metallic core. [28] Mercury's core occupies 85% of the planet's radius, making it the largest core relative to the size of the planet in the Solar System; this indicates that much of Mercury's surface may have been lost early in the Solar System's history. [33]