We're getting ready for liftoff as Rush's "Cygnus X-1" faces off against David Bowie's "Space Oddity" in our Rock Star Wars battle for rock's spaciest song.

To try and fill our days between now and the new Star Wars: The Force Awakens movie, we’ve tracked down 32 space-themed classic rock songs and paired them off against each other in a series of intergalactic battles. The field will be halved every week based on your votes, until only the spaciest song in rock history is left.

Rush's two-part opus, which totals more than 28 minutes and can be found spread out on 1977's A Farewell to Kings and the following year's Hemispheres, rocketed past Creedence Clearwater Revival's "It Came Out of the Sky" to claim more than 72 percent of the vote.

Bowie had a little tougher time defeating Van Halen's "Outta Space," snagging more than 63 percent of the vote with his 1969 breakthrough hit, the granddaddy of all outer-space-as-a-metaphor-for-alienation songs.

But which of these songs will emerge victorious from this round? It’s your choice. You can listen to both tracks below, and vote once per hour in each of the this round’s Rock Star Wars battles until voting ends Dec. 7 at 11:59PM ET. Your choice for our Rock Star Wars champion will be revealed on Dec. 22, 2015.

Listen to Rush's 'Cygnus X-1'

Listen to David Bowie's 'Space Oddity'

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