Difference Between Space and Universe

Key Difference – Space vs Universe

Although the two terms space and universe are often interchanged by many people, there is a distinct difference between space and universe.Space typically refers to the void that exists between celestial objectswhereas宇宙refers to all celestial objects as well as space.因此，空间和宇宙之间的关键区别在于包含天体对象。

CONTENTS
1.Overview and Key Difference
2.What is Space
3.What is Universe
4.Side by Side Comparison – Space vs Universe
5.概括

What is Space?

Space, also known as outer space, is the void that exists between celestial bodies, including planetEarth. It consists of a hard vacuum comprising a low density of particles, mainly a plasma of hydrogen and helium. It also includesmagnetic fields, electromagnetic radiation,neutrinos, dust and cosmic rays.

Intergalactic space takes up most of the volume of the Universe. In most星系, 90% of the mass is in an unknown form calleddark matter,通过引力与其他物质相互作用。

The space near Earth is classified into several astronomical categories or standards. It is generally accepted that space begins at the Kármán line on earth.

Geospace

This is the region of outer space near our planet. This includes the upper region of the atmosphere and the magnetosphere.

Interplanetary Space

这是行星和周围的空间the Sun of the solar system. It has a continuous stream of charged particles from the Sun, which is called the solar wind, creating a very thin atmosphere.

Interstellar Space

This is the physical space within a galaxy that is not occupied by planetary systems or stars. It spreads to the edges of the galaxy and fades into the intergalactic void.

Intergalactic Space

这是星系之间的空间。这在宇宙中的大规模结构之间具有宇宙空隙。

What is Universe?

宇宙基本上可以定义为存在的一切。它由所有类型的物理物质和能量，太阳系，行星，星系以及空间的所有内容组成。

Planet:A celestial body such as Earth or Mars, moving in an elliptical orbit around a star.

Star:A celestial body that generates light and other radiant energy

Solar System:The Sun and all objects, including planets, asteroids, comets, orbiting around it.

Galaxy:A group of many stars, along with dark matter, gas and dust.

大多数科学家使用大爆炸理论的科学模型来解释宇宙。大爆炸理论提出了这样一个概念，即宇宙从一个非常炎热，密集的阶段扩展，宇宙的所有物质和能量都集中了。大多数宇宙被认为是由一个未知物质制成的，称为暗物质。

What is the difference between Space and Universe?

Space vs Universe
Space refers to the void that exists between celestial objects.	宇宙是指所有物理物质和能量，太阳系，行星，星系以及空间所有内容的全部。
Celestial Objects
Space does not include celestial objects; it includes only the void between them.	Universe includes all celestial objects.
Size
Space consist of magnetic fields, electromagnetic radiation, neutrinos, dust and cosmic rays.	Universe consists of planets, stars, galaxies, as well as space.

概括– Space vs Universe

The main difference between space and universe is that space refers to the void between celestial objects whereas universe refers to the entirety of all physical matter and energy, solar systems, planets, galaxies, and all contents of the space. Thus, it can be surmised that space is a part of the universe.

Image Courtesy:
1. Gamemasterz的“ Galaxy-2048×1152” - 自己的作品(CC BY-SA 4.0)viaCommons Wikimedia
2. “Earth’s atmosphere” By Kelvinsong – Own work(CC BY-SA 3.0)viaCommons Wikimedia