Which phrase best defines a galaxy?

Galaxies are basically billions and billions of stars, gas, and  dust packed together which forms a galaxy.

The phrase that best defines a galaxy is "large collection of stars, gas, and dust held together by gravity".

large collection of stars, gas and dust held together by gravity.

Explanation:

A galaxy billions of stars, dust and gases. These are held together by gravity.

A galaxy comprises sites of new star formation in nebulae and old star clusters. It has globular clusters as well as loose, dis-organised open clusters.

Usually at the center of each galaxy, there is a super massive black-hole about which all the material in the galaxy rotates about.Galaxies have mainly three types of shapes- spiral, elliptical and irregular.

question: which statement best describes the different properties of metals?

answer: they are shiny and bend without breaking.

since metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. so therefore, metals are not dull and they are not non-flexible as listed. instead, they are shiny and flexible.

hope this , have a good day. c;