big bang model (noun) expanding universe: concept of the universe
Sinonime: breathe easy, calm down, catch one's breath, chill out, collect oneself, compose oneself, cool off, feel at home, hang loose, lie down, loosen up, make oneself at home, mellow out, put one's feet up, recline, rest, settle back, sit around, sit back, take a break, take a breather, take a load off, take it easy, take ten, unwind, wind down