Which of the following best describes what we mean by the universe?
A)the sum total of all matter and energy everywhere
B)a vast collection of stars that number as many as the grains of sand on all the beaches on Earth
C)all the galaxies in all the superclusters
D)The universe is another name for our Milky Way Galaxy.

Question

Quizplus · Accepted Answer

The universe is defined as the sum total of all matter and energy everywhere.

Note: B is incorrect as it only describes a part of the universe (the number of stars) rather than the entirety of it. C is also incorrect as it only describes the structure of the universe (galaxies) rather than the universe as a whole. D is incorrect as the universe encompasses all galaxies, not just the Milky Way.

Which of the Following Best Describes What We Mean by the Universe