JUNIOR ASTRONOMERS Junior Astronomers may be simply reinventing the wheel, but they're good at it. Said wheel includes The Replacements' ramshackle-but-right attack, the spacey, sun-burnt lyrics of early Meat Puppets, loud-soft Pixies dynamics plus nimble and melodic guitar that recalls The Strokes' glory days. Throw in the passion and commitment of Ted Leo and you've got the entire syllabus for Indie Rock 101. By now, that indie rock template is just as beholden to signifiers of the past as Americana, and JA's sound does not stray off the map. But none of that matters when Junior Astronomers take the stage. Charismatic and idiosyncratic front man Terrence Richard forges a near-psychic connection with the crowd, and the band's playing is heartfelt and authentic. Gigging for five years, with two EPs plus a forthcoming LP under their belt, Junior Astronomers are primed for bigger things. It remains to be seen if they can break out of their self-imposed stylistic mold. With Manray, Lazer/Wulf, and The Air Station. $7-$10. 9 p.m. Tremont Music Hall.