https://www.space.com/18643-mercury-composition.html

Oct 14, 2016 ... Mercury is a terrestrial planet with a rocky surface and metallic core. ... MESSENGER studied material kicked up and found traces of potassium ...

https://www.britannica.com/place/Mercury-planet/Surface-composition

Mercury - Surface composition: Messenger used X-ray fluorescence spectra to study ... ejecta is consistent with fresh material excavated from below the surface.

https://airandspace.si.edu/exhibitions/exploring-the-planets/online/solar-system/mercury/surface.cfm

Learn about the surface features of Mercury. ... is under study, but may relate to the release of gases or to sublimation of material exposed by the crater impact.

https://solarsystem.nasa.gov/planets/mercury/in-depth/

Mercury's surface resembles that of Earth's moon, scarred by many ... material is thrown far from the crater and then falls to the surface, ...

https://www.universetoday.com/34021/what-is-mercury-made-of/

Jul 3, 2009 ... Mercury has a large core of liquid metal surrounded by a mantle of ... Mercury's surface is similar in appearance to the Moon, with large ... See no ads on this site, see our videos early, special bonus material, and much more.

https://www.windows2universe.org/mercury/Interior_Surface/Surface/surf_feat.html

The surface of Mercury has numerous interesting features, including a ... and craters with lines or "rays" of bright material pointing out from the central crater.

https://www.windows2universe.org/mercury/Interior_Surface/Overview.html

Aug 11, 2010 ... Mercury, the innermost planet of the solar system, is a little bigger ... Images of the surface of Mercury obtained by Mariner 10 showed a ... The source of this material is Windows to the Universe, at http://windows2universe.org/ ...

https://www.nationalgeographic.com/science/space/solar-system/mercury/

May 9, 2019 ... Lack of an atmosphere also means Mercury's surface is pockmarked by numerous impact craters, since incoming meteors don't encounter any ...

https://en.wikipedia.org/wiki/Mercury_(planet)

Mercury is the smallest and innermost planet in the Solar System. Its orbital period around the ... Mercury's surface appears heavily cratered and is similar in appearance to the ... the materials of which Mercury is made would be denser than those of Earth, with an uncompressed density of 5.3 g/cm3 versus Earth's 4.4 g/cm3.

http://coolcosmos.ipac.caltech.edu/ask/29-What-is-Mercury-made-of-

Mercury is a rocky planet with a huge iron core which makes up a large part of its interior. The core takes up nearly 3/4 of the planet's diameter. Mercury's iron ...