age of sun and earth

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 earth is a huge sphere. The surface of which is made up of rock, soil and water. It is surrounded by air. The planet earth is only a tiny part of the universe, but it is the home of human beings and many other living things. Animals and plants live almost everywhere on the h..

The ratio of 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? => 2..

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..

The method used in the binary star system can be also used for planet-satellite binary system. This is possible because the planet and the satellite also revolve around a common centre of mass...

. The planet we live on is not just a ball of inert material. During the past ages, dramatic changes have taken place inside the earth. Without these changes, life could never have originated on the earth. And changes are still going on today, like the occurrence of ea..

o = Amount of U-238 isotope originally present in a small quantity of the rock or mineral at the time the rock was formed. N = Amount of U-238 still left undecayed after the lapse of time t which represents the age of the rock. k = the decay constant of U-238. We can determine the ..

A star is a dense cloud of hydrogen and helium gas contracting under its own gravitational pull. In all the stars hydrogen atoms are continuously converted into helium atoms and this process is accompanied by a large amount of energy. This energy is radiated in the form of heat and light. The stars..

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

The atmosphere around earth is a blessing of nature on earth to have permitted the existence of life on it. Earth is endowed with an excellent resource of atmosphere - both to shield it from sun's harsh rays and other ill effects of celestial bodies as ..