Following a busy 2019 that included two album releases and their first-ever U.S. tour, ASTRO is looking to reintroduce themselves with a new EP that looks to transcend their past.Following the release of the K-pop boy band's Gateway -- that ties in everything from surging pop on standouts "Knock" and "Lights On" to playful hip-hop for "When You Call My Name" -- ASTRO sees gains across the board to mark a return to Billboard's Emerging Artists chart.At No.