UNIVERSE
ASTEROIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Contain nickel and iron.
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Are those whose composition is unknown.
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Both are true
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None of the above
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Detailed explanation-1: -S-types (stony) are made up of silicate materials and nickel-iron, and accounts for about 17 percent of known asteroids. They are brighter than C-type and they dominate the inner asteroid belt. M-types (metallic) are made from nickel and iron and accounts for about 8 percent of known asteroids.
Detailed explanation-2: -M-type (aka M-class) asteroids are a spectral class of asteroids which appear to contain higher concentrations of metal phases (e.g. iron-nickel) than other asteroid classes, and are widely thought to be the source of iron meteorites.
Detailed explanation-3: -M-type asteroids inhabit the main belt’s middle region. The relationship between asteroids and meteorites remains a puzzle. The most common meteorites, known as ordinary chondrites, are composed of small grains of rock and appear to be relatively unchanged since the solar system formed.
Detailed explanation-4: -M-class asteroids are moderate-albedo objects, may have significant amounts of nickel-iron metal in their surface material, and exhibit spectral reflectances similar to the nickel-iron meteorites (see iron meteorite).
Detailed explanation-5: -There are three main groups, based upon the composition of the asteroid: C – Chondrite, clay and silicate rocks. S – Stony, silicate materials and nickel-iron. M – Metallic, nickel-iron.