Page 159 - General Knowledge

GENERAL KNOWLEDGE 2019

PLANETS

The planets are the major components of the Solar System. The table below gives the
approximate mass of each body in comparison to the mass of the Earth.

Solar System Object Mass (in relation to Earth)
Sun more than 300,000 times heavier than the Earth

Mercury 1/18 of the mass of the Earth
Venus 1/1.22 (80%) of the mass of the Earth

Earth 1

Moon 1/81 of the mass of the Earth
Mars 1/9 of the mass of the Earth

Jupiter 318 times the mass of the Earth
Saturn 95 times the mass of the Earth

Uranus 15 times the mass of the Earth
Neptune 17 times the mass of the Earth

Pluto 1/400 of the mass of the Earth
Sedna ?

The Sun is more than 300,000 times as massive as the Earth. It is the largest and most massive
object in the Solar System. Pluto has 1/400 of the mass of the Earth. It is the least massive of
the planets.

THE PLANETS IN SEQUENCE

One of the important skill areas in K-4 for Standard 11 is that the students should be able to
make a model showing the planets in correct sequence. The planets are briefly described below
in the sequence in which they are found in the Solar System.

Mercury
 Mercury is the closest planet to the Sun.
 The mass of Mercury is much smaller than that of the Earth. Mercury has about 1/9 of
the mass of the Earth.
Venus
 Venus is the second planet from the Sun.
 The mass of Venus is almost the same as that of the Earth. Venus has about 82% of the
mass of the Earth.

Earth
 Earth is the third planet from the Sun.
 Earth has one satellite called the Moon. The mass of the Moon is 1/81 of the mass of the
Earth.

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