Moon Planet Facts and Information In English PDF Download – Physics
The study of moon is called Selenology.
Some important facts and information about Moon are given below.
Moon Information
| Queries | Answers |
| Distance from Earth | 382200 Km |
| Diameter | 3475 Km |
| Mass (with respect to Earth) | 1 : 8.1 |
| Ratio of Gravitational Pull of Motion and Earth | 35000 ft (Leibnitz Mountain) |
| Time taken by moonlight to reach Earth | 1.3 sec |
| Rotation Speed | 3680 km/h |
| Speed of Revolution around Earth | 3680 km/h |
| Revolution period around Earth | 27 days, 7 h, 43 min and 11.47 sec |
| Rotation Period | 27 days, 7 h, 43 min and 11.47 sec |
| Atmosphere | Absent |
| Part of Moon not visible from Earth | 41% |
| Maximum distance from Earth (Apogee) | 406000 Km |
| Maximum distance from Earth (Perigee) | 364000 Km |
| Circumference | 11000 Km |
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- Moon is also known as the fossil planet.
- The Moon is the only natural satellite of the Earth.
- The moon has no atmosphere, no twilight and no sound.
- The size of the moon is 1/4th the size of the Earth.
- Gravitational pull of Moon is 1/6th that of the Earth. Your weight will be about 1/6th weight on earth.
- Silicon, Iron, magnesium etc elements are found mainly on Moon’s surface.
- Temperature on moon varies from super hot to super cold. When sun rays falls on its surface, temperature can reach to a scorching 127° C. However, when sun goes down, temperature can plunge around -153° C.
- First person kept his feet on moon is Neil Armstrong.
- Moon has a very thin and tenuous atmosphere called an exosphere. It is not breathable.
- It is fifth largest natural satellite in the solar system.
Moon Facts
- It is drifting away from earth roughly 3.8 cm every year.
- Your weight will be much less on moon due to less gravity.
- Rise of tides on earth is due to moon.
- Moon has also quake like crack and rupture.
- Lunar eclipse is formed when earth passes between the Sun and Moon and a shadow is cast on moon.
- Solar eclipse is formed when the Moon passes between the Sun and the Earth and causing a shadow to project onto the Earth’s surface.
- Moon has no dark side.
- No protection is available on moon from cosmic rays, meteorites, asteroids, comets or solar winds.
Moon Phases
Half of the moon that faces sun lit up as the moon orbits around the Earth. Various kind of shapes of lit portion of moon that can be seen from earth are known as phases of the moon. Each phase repeats itself after every 29.5 days.
Moon passes through 8 major phases.
New Moon
When the Moon cannot be seen because we are looking at the unlit half of the Moon. The new moon phase occurs when the Moon is directly between the Earth and Sun. A solar eclipse can only happen at new moon.
Waxing Crescent Moon
When the Moon looks like crescent and the crescent increases (“waxes”) in size from one day to the next. This phase is usually only seen in the west.
First Quarter Moon (or a Half Moon)
When half of the lit portion of the Moon is visible after the waxing crescent phase. It comes a week after new moon.
Waxing Gibbous Moon
When more than half of the lit portion of the Moon can be seen and the shape increases (“waxes”) in size from one day to the next. The waxing gibbous phase occurs between the first quarter and full moon phases.
Full Moon
When we can see the entire lit portion of the Moon. The full moon phase occurs when the Moon is on the opposite side of the Earth from the Sun, called opposition. A lunar eclipse can only happen at full moon.
Waning Gibbous Moon
When more than half of the lit portion of the Moon can be seen and the shape decreases (“wanes”) in size from one day to the next. The waning gibbous phase occurs between the full moon and third quarter phases.
Last Quarter Moon (or a Half Moon)
When half of the lit portion of the Moon is visible after the waning gibbous phase.
Waning Crescent Moon
When the Moon looks like the crescent and the crescent decreases (“wanes”) in size from one day to the next.
What is blue moon?
A second full moon in one calendar month is usually called a “blue moon”. It occurs approximately every 3 years. The idiom “Once in a blue moon” refers to something that does not happen often (like a blue moon).
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