"a"
Smallest and nearest are two different criteria. See related questions.
The solar system is the smallest
A star - especially as a galaxy is formed of billions of stars.
Mars is not a galaxy! It is a planet in our solar system.
No. In fact, it is one of the largest we know of.
no.
In order from smallest to largest: Solar System, Galaxy, and Space.
Higgs Boson -> Galaxy Filaments.
Universe, galaxy,nebula,solar system, star, planet
Another word for galaxy is "star system" or "stellar system."
25
The smallest compound word may be into.