about the earth and sun

The ratio of the mean distance of the Mars from the Sun to the mean distance of the Earth from the Sun is 3 : 2. If the mean distance of the Earth from the Sun is 240 million miles, then what is the mean distance of the Mars from the Sun? ..

The Sun - The sun is at the center of the solar system. Its mass is about 740 times as great as that of all the planets combined. The huge mass of the sun creates the gravitation that keeps the other objects traveling around the sun in an orderly manner. ..

The aphelion distance, perihelion distance of the earth from the sun are about 152 Gm and about 147 Gm. What is the length of the semi major axis of the orbit of the Earth around the sun? [1Gm = 10 9 meters. ] => 147 Gm or 152 Gm or 149.5 Gm or 5 Gm..

A model of the solar system is displayed in a planetarium. A sphere with diameter 9 feet represents the Sun. The diameter of the Sun is 109 times the diameter of the Earth. Estimate the diameter of the model represented as the Earth. => 2.1 inches or 1.9 feet..

We know that energy falling in one second on the unit area of the earth's surface held normal to sun's rays is called solar constant S. Experimentally, S has been found to be equal to 1388 Wm - 2 . Let R be the radius of the sun and r be the radius of earth's..

Green house gases in the atmosphere behave much like the glass panes in a green house. Green houses are like small glass houses whose transparent glass roof and walls allow sunrays to pass through. It keeps the heat from escaping, thus allowing vegetables and flowers to grow even in cold weather. ..

One year is the time which the earth takes for one revolution around the sun which is, equal to 365 day..

It was once believed that the earth was the center of the universe and that everything moved around it. It was later discovered that the earth moves around the sun..

The tides are formed due to the gravitational force of attraction between the earth, sun and moon. During high tides sea water is trapped in a reservoir, and released later to drive turbines, which in turn produces electricity. The block diagram given below illustrates the..

Question: Give an example of a body moving with a uniform speed but variable velocity. Answer: A body moving along the circumference of a circle. e.g., Revolution of the earth around the sun..