i want essay about universe in 150-200 words
Answers
Answer:
The Universe is everything we can touch, feel, sense, measure or detect. It includes living things, planets, stars, galaxies, dust clouds, light, and even time. Before the birth of the Universe, time, space and matter did not exist.
The Universe contains billions of galaxies, each containing millions or billions of stars. The space between the stars and galaxies is largely empty. However, even places far from stars and planets contain scattered particles of dust or a few hydrogen atoms per cubic centimeter. Space is also filled with radiation (e.g. light and heat), magnetic fields and high energy particles (e.g. cosmic rays).
The Universe is incredibly huge. It would take a modern jet fighter more than a million years to reach the nearest star to the Sun. Travelling at the speed of light (300,000 km per second), it would take 100,000 years to cross our Milky Way galaxy alone.
No one knows the exact size of the Universe, because we cannot see the edge – if there is one. All we do know is that the visible Universe is at least 93 billion light years across. (A light year is the distance light travels in one year – about 9 trillion km.)
The Universe has not always been the same size. Scientists believe it began in a Big Bang, which took place nearly 14 billion years ago. Since then, the Universe has been expanding outward at very high speed. So the area of space we now see is billions of times bigger than it was when the Universe was very young. The galaxies are also moving further apart as the space between them expands.
Universe means unimaginably vast space which is unbounded with its dots of body’s are by definition, the universe includes everything that abounds in space, and space is filled with matter which varies from the tiniest and cosmic particle to the gigantic galaxies. The universe is known to composed of many types of comparatively small and large dense Bo e.g., the galaxies, the constellations, the stars, the planets other heavenly bodies.
Nobel Laureate Albert Einstein said that the Universe have no centre or an edge. It is the gravity that makes all of space time rather circular. It is reckoned that the mighty explosion, “The Big Bang” only created the Universe. The flash of the explosion (The Big Bang) that appeared in a split second or so, tossed matter flying all around.
arth is one of the planets circling round the sun. The sun with all its planets form the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus Neptune and Pluto. Mercury is the nearest planet to the sun while Pluto is farthest away. The earth is the third planet from the sun.
Apart from planets, there are moons, moving around the planets. Like the planets the moons also reflect only the sunlight. Our earth has one moon. Saturn has nine moons and Jupiter has twelve moons.
The earth was once a large ball of burning gases. This hot cloud of gases spun around for many million years. It became slowly cooler and it hardened. It slowly became fit enough for lives to grow and flourish. The molten metals and gases are still lying in the centre of the earth. When they are able to exercise pressure to come out we have the volcanoes.
Earth is the third planet from the sun, rotating itself and moving around the sun what is known as its orbit. So also every planet has its own orbit around the sun. The earth moves around the sun at a speed of 96,000 kilometers per hour. The earth’s crest is made up of rocks.
The earth’s axis is slightly tilted. Seasons are caused by this tilting of the earth’s axis and the revolution of the earth round the sun. Seasons affect the lives of plants, animals and men.