changes in earth and sky

Month by month, as the earth orbits the sun, we can watch the constellations move across the sky. In summer, in northern skies, we can see the little bear with its long tail. In winter, a very different pattern of stars lies above. Orion, the hunter, one of the most be..

Sky waves are the AM radio waves, which are received after being reflected from the ionosphere. The propagation of radio wave signals from one point to another via reflection from ionosphere is known as sky wave propagation. The sky wave propagation is an important co..

Properties of earth materials Objects in the sky Changes in earth and sky..

Properties of earth materials Objects in the sky Changes in earth and sky..

Even before Sir Edward Appleton's pioneering work in 1925, it had been suspected that ionization of the upper parts of the Earth's atmosphere played a part in tile propagation of radio waves, particularly at high frequencies. Experimental work by Appleton showed that the atmosphere recei..

. 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 dipole pattern of earth's magnetic field is disturbed due to solar winds. Solar winds are a stream of charged particles coming from the sun. These particles ionise the atmosphere above these poles which display a light high up in the atmosphere. This phenomenon occurring in the arctic..

Environment of earth includes the whole of atmosphere, hydrosphere as related to biosphere. Therefore, environment includes nature, composition of air, characters of hydrological parameters, sunshine, air pressure, temperature, water resources - their storage and flow and all other ..

. Earth's atmosphere in its present form, is evolved and even now being influenced by earth's movement on its axis as well as sunlight. These two parameters decide what type of atmosphere we have now - its composition as well as the total height of atmospheric cover around the h..

Types of Environmental Changes - Environment of earth includes the whole of atmosphere, hydrosphere as related to biosphere. Therefore, environment includes nature, composition of air, characters of hydrological parameters, sunshine, air pressure, temperature, water resources - ..