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en.wikipedia.org/wiki/Asteroid

Asteroids are minor planets, especially those of the inner Solar System. The larger ones have ... In the case of comets, the difference is one of composition: while asteroids are mainly composed of mineral and rock, comets are composed of dust ...

www.space.com/14749-asteroids-composition.html

Mar 1, 2012 ... This composite image shows the comparative sizes of eight asteroids. Until now, Lutetia, with a diameter of 81 miles (130 kilometers), was the ...

www.universetoday.com/37425/what-are-asteroids-made-of

Sep 12, 2015 ... All asteroids and comets visited by spacecraft as of November 2010 ... Asteroids are made mostly of rock — with some composed of clay and ...

spaceplace.nasa.gov/asteroid

Nov 17, 2016 ... Asteroids are small, rocky objects that orbit the sun. ... Most asteroids are made of different kinds of rocks, but some have clays or metals, such ...

research.arizona.edu/stories/what-is-an-asteroid

Jun 28, 2017 ... What are Asteroids Made Of? Scientists use the amount of metal elements to classify an asteroid. One with greater mass and gravity has more ...

www.esa.int/Our_Activities/Space_Science/Asteroids_Structure_and_composition_of_asteroids

The typical composition of an asteroid depends on its distance from the Sun. ... majority of asteroids are grey, without the carbon material and principally made of  ...

curious.astro.cornell.edu/physics/72-our-solar-system/comets-meteors-and-asteroids/asteroids/298-how-did-asteroids-form-and-what-is-the-difference-between-an-asteroid-and-a-comet-beginner

Jul 18, 2015 ... Can you please tell me how asteroids are formed and what is the ... They're made of ice, which would melt if it was as close to the Sun as the ...

www.ask.com/youtube?q=What+Is+an+Asteroid+Made+of%3F&v=lQF3SfHK3j4
Mar 31, 2014 ... What are asteroids made of? OSIRIS-REx presents a new 321Science video about the basic materials of asteroids. This video explor...

curious.astro.cornell.edu/our-solar-system/comets-meteors-and-asteroids

Jan 16, 2015 ... Comets, meteors, and asteroids are often grouped together since they ... Comets are objects composed mostly of ice and dust that grow tails ...