Shishu Sansaar | Science
1-Some Facts About Moon
See also List of Eclipses Eclipses Solar Eclipse Lunar Eclipse
(1) The Moon is moving away from the Earth about 1.6 inches every year. It means that it was nearer to Earth before and, maybe, one day it will move away so far that it might disappear. Researchers say that when it was formed its distance from Earth was about 14,000 miles. Now it is more than 280,000 miles.
It used to be much closer - a billion years ago. Then it took only 20 days to go round the Earth making a month. At that time the day on Earth was only 18 hours long. The Moon is still moving away - 1.6 inches (4 cms) a year; while meanwhile the Earth's rotation is slowing down lengthening our days. In the distant future our day will be 960 hours long.
Moon takes 29
days, 12 hours, 44 minutes (29.53 days) to revolve around the Earth.
Because these two days only a part of lighted Moon is visible to us. The Sun revolves around the Earth in 365 days, therefore he moves 1 degree towards East in relation to stars. While Moon revolves in 27 days, he moves 13 degree plus. After New Moon, Moon always rises and sets 49 minutes later than the Sun's time of rising and setting. On second day it sets after 1.38 of sunset, that is why it is seen in the West after sunset. After this it can be seen for more time every night until Full Moon. Its lighted part continues increasing (this one day lighted part is called "1 Kalaa (phase)" and on Full Moon day we can see the Full Moon in the sky. After this its lighted part again starts decreasing and it can be seen in later part of the nights till the New Moon night.
When Moon is between the Earth and the Sun, it is new Moon day
Do You Know
How much will you weigh on the Moon?
Created by Sushma Gupta on January 15, 2002
Modified on 09/23/13