What is the difference between "large" and "massive"? [closed]

What is the difference between large and massive? They both seem the same but when I read this article I stumbled across this:

Scientists using NASA’s Hubble Space Telescope have discovered that the immense halo of gas enveloping the Andromeda Galaxy (M31), our nearest massive galactic neighbor, is about six times larger and 1,000 times more massive than previously measured.

(source: astronomy.com )

EDIT: To clarify this question, I am asking for the difference between larger and more massive. How can it be 6 times larger but also 1000 times more massive? Is it talking about size?

Solution 1:

Large refers simply to its physical size. Massive refers to an object's mass, which in everyday scenarios corresponds to its weight.

So an object like a collapsed star may be relatively small in size but extremely massive, due to its incredibly high density.