"New Horizons" is Brian May's tribute to NASA's New Horizon space probe as it passes by Ultima Thule, which is an object passing through the Kuiper Belt just beyond Neptune. They released the song on New Years Eve to commemorate the event.
I'm throwing this in just for fun. The Brian May Band in 1993, Live at The Brixton Academy, covering Rainbow's "Since You've Been Gone." Good stuff. And check out those back up singers!