(NASA)

July 20
Mars Day!
National Air and Space Museum, Independence Avenue at Sixth Street SW; Fri., 10 a.m.-3 p.m., free
Learn about the red planet from National Air and Space Museum scientists, who’ll be at the museum for this annual event to discuss the history of water on Mars, the minerals found by the Curiosity rover and other discoveries. Visitors can also see a real Martian meteorite and learn about the European Mars Express mission, which is using radar to map the planet’s atmosphere.

July 20
Nicki Bluhm
The Hamilton, 600 14th St. NW; Fri., 8 p.m., $20-$29.50.
Last year was full of change for Nicki Bluhm: The singer split with husband/bandmate Tim Bluhm, put their band The Gramblers on hiatus and moved from California to Nashville. Out of all the upheaval came the appropriately titled solo album “To Rise You Gotta Fall.” Nashville clearly influenced the 11-song set of country-ish tunes, as did her divorce, which Bluhm details in several heartbreaking songs.

July 24
Jason Isbell and the 400 Unit
Wolf Trap, Filene Center, 1551 Trap Road, Vienna; Tue., 8 p.m., $35-$65.
Country rocker Jason Isbell won Grammy awards for last year’s “The Nashville Sound” and album highlight “If We Were Vampires,” so you could consider this summer’s tour with his excellent backing band the 400 Unit a victory lap — one he’ll continue into the fall before a six-show run at home in Nashville.

July 25
Wilder Maker
Black Cat, 1811 14th St. NW; Wed., 7:30 p.m., $10-$12.
It’s hard to pin down Brooklyn-based Wilder Maker. The band’s bio lists Dr. John, Fleetwood Mac, John Coltrane and Ethiopian music as influences — and each comes through, in different ways, on the just-released “Zion.” The group celebrates the expansive, experimental seven-song set at the Black Cat Wednesday.