Fill in the blank with the word that best matches the description

The name given to many indiscernible objects in space now know that these are galaxies dust clouds star clusters etc

Quasars
Nebulae
Galaxy

An enormous collection of billions of stars gas and dust held together by gravity

Quasars
Nebulae
Galaxy

Some of the most distant and there for oldest objects in the universe releases energy of billions of stars

Quasars
Nebulae
Galaxy

The correct options are:

1) Nebulae

2) Galaxy

3) Quasars

Explanation:

Nebulae was the term used to designate objects of astronomy such as distant galaxies which where indiscernible.

A galaxy is a extensive collection of billions of stars, gas and dust that are kept together by gravitational forces.

GALAXY - A large collection of stars, dust, and gas in space. A system of millions or billions of stars held together by gravity. Examples include our own Milky Way.

Quasars are very powerful luminous objects that are located at the centers of distant galaxies hence they are among the most distant objects making them very old.