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What order do these go in: solar system, galaxy, universe? What is the relationship between the three?

Answer 1

John Alexander

In order of increasing size we have solar system, galaxy and universe.

A solar system consists of a sun and one or more planets that orbit it.

An assembly of solar systems revolving around the galactic center is called a galaxy.

Galaxies make up the universe.

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Answer 2

Asher Cohen

The correct order is: solar system, galaxy, universe. The solar system consists of the sun and all the objects that orbit it, including planets, moons, asteroids, and comets. A galaxy is a large system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The universe encompasses all of space, time, matter, and energy, including all galaxies and the contents of intergalactic space. Each level is progressively larger in scale, with the universe being the largest encompassing entity.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.