vacuum
Let's is the contraction of the two words 'Let us'
Clusters of stars that all appear to lie at the same distance from us are called star clusters. There are two main types: open clusters, which contain young stars and are loosely bound together, and globular clusters, which contain older stars and are tightly packed.
let us
"Come Together" on Abbey Road, and "Two Of Us" on Let It Be. two of us
Only the two of you know the answer to this.
Fleetwood Mac-- "The Chain"
Let's = Let us
let us
The two words that make up the contraction let's are let and us.
Up or us are two letter words.
nation and justice
let us