universe · noun /ˈjuː.nɪ.vɜːs/
the universe
B1 everything that exists, including all the stars, space, etc.
Dictionary example:
Is there intelligent life elsewhere in the universe?
Learner example:
I'm the last survivor of a great civilization that is now extinguished. I've been looking for a planet like yours for ages, to transmit the secret of my people. Take this box: this source of energy means strength, it is the most powerful item in the universe! (First Certificate in English; B2; Spanish)