Science: What to Know Flashcards
Know everything
What is space?
Space is practically exactly the same as its name. It is not everything, but all the space between the objects. If a bucket is a universe, the space between those irregular rocks, all together, would be defined as space. Space is everything except for the objects in the universe. The universe is much bigger than space. Written as an equation,
Space=Universe-all celestial objects
What is the universe?
The universe is used to describe everything. Whether you call it the cosmos or the universe, it means an ever-expanding area that everything exists in. It is everything that was, is, and will be. We live in the universe, and everyone you might know also does. According to us, there is only one universe, and a force known as Dark Energy causes the universe to expand. However, some believe that there is more than 1 universe.
What is the observable universe?
The observable universe is the portion of the universe that is possible to be seen. This is related to the age of the universe. In the 13.8 billion years of the universe, some light emitted by stars is so far away, that the universe had not existed long enough for the light to reach us. Light is fast, but not infinitely fast. A new galaxy known as GN-Z11, which is 13.4 billion years old,
