Sustainable Development: Here Comes The Human Civilization By Nabarup Ganguly, Department of Geography

We are here.

Our Sun is one of the billion of stars in our galaxy, the Milky Way. It is located about 26,000 light- years from the centre of the galaxy. The Milky Way is a large spiral galaxy in the form of a dusk, and is about 100,000 light years.Untitled

By the way, the universe is about 93 billion light-years across!

A light-year (symbol: ly) is a unit of distance; it is the distance that light travels in one year. Light moves at a velocity of about 300,00 km/s. That is fast and nothing can travel faster.

OVERVIEW OF THE SOLAR SYSTEM

Our Solar System condensed from a slowly rotating cloud of gas and interstellar dust about 4.6 billion years ago. The gas cloud or solar nebula was primarily made up of Hydrogen and Helium, with much smaller amounts of heavier elements like Carbon, Nitrogen, Silicon, Sulphur, Iron and others.

The major part of the Solar nebula came togethedsr to form the Sun, whatever little mass was left formed the planets and their moons and other bodies like the asteroids, meteoroids and the comets.

Our Solar System is about 4 light-years in diameter and one object makes it special. It has a planet that supports life; Earth.

In the April 2012 issue Proceedings of the National Academy of Sciences of the United States of America (PNAS), scientists announced that Life began on Land (in ponds) and not in Sea!

The lead scientist Prof. Mulkidjanian from University of Osnabruck said ”the ocean was invaded by life at a later stage”

Anyway, land or sea, life somehow began and it is beautiful.

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One thought on “Sustainable Development: Here Comes The Human Civilization By Nabarup Ganguly, Department of Geography

  1. Pingback: Sustainable Development: Here Comes The Human Civilization By Nabarup Ganguly, Department of Geography | Jugraphia Slate

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