# Space: Explained Using Simple Terms

• jamie m
In summary, space is the vast, three-dimensional expanse that contains all matter and energy in the universe. It is continuously expanding and estimated to be about 93 billion light-years in diameter. Gravity still exists in space, but it is much weaker due to the large distances between objects. Humans can survive in space with specialized equipment, but the lack of gravity and exposure to radiation can have negative effects. Objects in space move according to Newton's laws of motion, with no air resistance allowing them to continue moving unless acted upon by external forces.
jamie m
can anyone tell me what space is, I know matter is energy and time is changes in the state of energy, so is space a static form of energy. I'd like someone to explain using simple terms if possible please.

Space is an embedding metric of the distribution of mass and energy.

Space, itself, is not energy, but contains energy.

The volume of space enclosing a black hole contains much more energy than the same volume of space in an intergalactic area with little mass in it.

Space is the vast, empty area that surrounds us and everything in the universe. It is made up of three dimensions: length, width, and height. Unlike matter and time, which are constantly changing, space is considered to be a static or unchanging form of energy. This means that it does not have a physical form like matter, but it still has energy that allows objects to move and interact within it. Think of space as the stage on which all the events and objects in the universe take place. It is always expanding and can be affected by things like gravity, but it remains a constant presence in our universe.

## 1. What is space?

Space refers to the vast, three-dimensional expanse that contains all matter and energy in the universe. It is often described as the absence of everything, but it actually contains various forms of radiation and particles.

## 2. How big is space?

Space is immeasurably vast and continuously expanding. The observable universe, which includes all the galaxies and matter we can detect, is estimated to be about 93 billion light-years in diameter.

## 3. How does gravity work in space?

In space, gravity still exists and is responsible for holding objects like planets, stars, and galaxies together. However, it is much weaker in space due to the large distances between objects.

## 4. Can humans survive in space?

Humans can survive in space with the help of specialized equipment and technology, such as spacesuits and spacecrafts. However, the lack of gravity and exposure to radiation can have negative effects on the human body.

## 5. How do objects move in space?

Objects in space move according to Newton's laws of motion, which state that an object will remain in motion or at rest unless acted upon by an external force. In the vacuum of space, there is no air resistance, so objects can continue moving in a straight line unless acted upon by gravity or other forces.

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