Meaning: The galaxy was very big and it was full of amazing things to see.
Choice of Words: Stretched: means to make something longer or wider. Filled: means to put something inside something else until it is full.
Alternative Expressions
Galaxy expanded, brimming with marvels.
Meaning: This sentence is also describing how big and amazing the galaxy is. It's like saying, The galaxy has gotten bigger and there are so many cool things in it.
Choice of Words:Galaxy is a huge collection of stars, planets, and other things in space. Expanded means that the galaxy has gotten bigger. Brimming means that the galaxy is full of things. Marvels are amazing things. So, this sentence means that the galaxy has gotten bigger and it is full of amazing things.
Cosmos unfurled, teeming with wonders.
Meaning: This sentence is also describing how big and amazing the galaxy is. It's like saying, The galaxy has spread out and there are so many cool things in it.
Choice of Words:Cosmos is another word for galaxy. Unfurled means that the galaxy has spread out. Teeming means that the galaxy is full of things. Wonders are amazing things. So, this sentence means that the galaxy has spread out and it is full of amazing things.