Monthly archives: August, 2020

Satellites, Meteors, Constellations and Auroras.

Satellites: Satellite is a large body which revolves around a planet. The Solar System has 162 satellites. Out of these satellites, Jupiter has 63, Saturn has 56, Uranus has 27, Neptune has 13, Mars has 2 and Earth has one satellite(Moon). Major Satellites of Solar System are as under: Earth: Moon Mars: Phobos, Deimos. Neptune: …

Environmental Determinism and Possibilism:

Historical Background: It is the doctrine that human activities are controlled by environment. This belief has deep roots in ancient history. For example, Hippocrates linked the characteristics of people in a particular place to the influence of environmental factors such as terrain, altitude and humidity. Similarly Aristotle also said that the world’s climatic zones determined …

Weathering Process and Types of weathering.

The rocks break and undergo decay under the influence of atmospheric agencies like winds, sun, frost, water and organisms and produce soil. This phenomenon is called ”weathering”. Weathering and erosion together lowers the mountains and produce sediments. The weathering may be defined as the process which tends to break and decompose rocks in place. It …

Different Celestial Bodies and Natural Phenomena.

Galaxy: A galaxy is defined as a huge congregation of stars which are held together by the force of gravity. Galaxies numbering millions lie scattered in the Universe like dots. The galaxies are the clusters of stars. These can be spiral galaxies, elliptical galaxies or irregular galaxies. Out of these, the spiral galaxies are large …

Major Satellites of Solar System.

All the planets of Solar System except Venus and Mercury have satellites (moons). Out of these, Jupiter leads with 63 moons followed by Saturn (56) and Uranus (27). Notable moons of Solar System are as given in the table below. Planets Total No. of Satellites Major satellites Mars 2 Phobos, Deimos Jupiter 63 Europa, Ganymede, …

Statistics of Universe

Sun came into existence about 4.5 million years ago. The Universe is 10-20 thousand million years old. There are thousands of millions of galaxies. Abell is the farthest located galaxy which is about 13,230 million light years away. Diameter of milky way is about 105 light years. The Solar System revolves around the center of …

What is Geography. What are its main branches.

Geography Geography is the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources and political and economic activities. In other words Geography is the study of places and the relationships between people and their environments. …

The Solar System and Its planets.

difference among the inner and outer panets.

The Solar System comprises of the Sun and eight planets (excluding Pluto) which revolve around it in fixed orbits. The Sun is the center of the Solar system. Distanc-wise Mercury is closest to the Sun followed by Venus, Earth, Mars, Jupiter, Saturn, Neptune. Pluto was excluded from the Solar system by the Scientists and was …

Scope of Geology

Geology is of practical importance to mankind. It plays a very useful part in the search of coal, petroleum, minerals used as atomic fuels. It is directly concerned with the ore mineral, industrial minerals and mining industry. The importance of geology has also been recognized in the field of engineering. Many engineering projects such as …