SPACE

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                          ALL ABOUT SPACE


1. Space

Space is a term that can refer to various phenomena in science, mathematics and computing and generally encompasses the concept of an area or region. It is often used as a shorthand for outer space.
Space, also known as outer space, is the area directly outside of Earth's atmosphere. Space technically begins at the Kármán Line, which is about 100 km or 62 miles above the Earth. Unlike Earth, there is no air in space, which is why astronauts have to wear high-tech spacesuits to travel there.
(A light year is the distance light travels in a year and is equal to six trillion miles.) Yet the edge of space – or the point where we consider spacecraft and astronauts to have entered space, known as the Von Karman Line – is only 62 miles (100 kilometers) above sea level.

2.Outer space

Outer space is the region beyond a planet's atmosphere. For Earth, it begins about 100 kilometers (62 miles) above sea level. The line separating the atmosphere and outer space is called the Kármán line. The term outer space and the universe are roughly equivalent, except that outer space refers only to the area between planets, while the universe encompasses planets as well.

The universe is about 13.8 billion years old. It came into existence during the big bang. Due to the speed of light, telescopes can only see up to 13.8 billion light-years away. The universe is still expanding. There is debate among scientists whether the universe is infinite or is finite in size. It is unknown what is beyond the edge of the visible universe.



3.Is space an entity?
  • The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework .


4.What is a space in mathematics?

  • In modern mathematics spaces are defined as sets with some added structure. They are frequently described as different types of manifolds, which are spaces that locally approximate to Euclidean space, and where the properties are defined largely on local connectedness of points that lie on the manifold.


5.What does space mean in physics?
  • Space is a term that can refer to various phenomena in science, mathematics and computing and generally encompasses the concept of an area or region. It is often used as a shorthand for outer space. What is outer space? Outer space is the region beyond a planet's atmosphere. For Earth, it begins about 100 kilometers (62 miles) above sea level.






  • 6.How big is the universe?
    • 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.


Location: Delhi, India

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