Write a short note on universe
Answers
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 it means something that expend to infinity means we cannot find till where it is the universe is very large and the entire planet there are galaxies and millions and millions of other galaxies are present in Universe it is also known as Cosmos the study of universe is called cosmology many country have sended many spacecraft through determined where universe and but they were failed and still now it is not discovered where the universe end it is believed that the universe expand tel 10000 Millions light year the universe is continuous expanding after the explosion known as Big Bang which was happen ago 13000 millions light year ago thank you and hope ithelp please mark me brainliest