Pick the keyword from the given list: A new class of planets including Pluto.
Answer to Problem AM
Explanation of Solution
The necessary conditions for a celestial body to be a planet are as follows,
(1) It must be in an orbit about the Sun.
(2) It must have enough mass for self-gravity so that it forms an approximate round shape.
(3) It must be the dominant body within its orbit.
The celestial bodies which do not qualify all of these conditions are called dwarf planets. Examples of dwarf planets are Pluto, Ceres, Eris, Haumea and makemake.
So, dwarf planet is a new class of planets including Pluto.
Conclusion:
Therefore, the word dwarf planet can be picked from the list.
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Chapter 16 Solutions
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