- A park ranger will lead a planetarium program about the season’s brightest stars, planets and constellations (for ages 5 and older). 1 p.m. Free. Rock Creek Nature Center, 5200 Glover Road NW. 202-895-6070.
- Lee Coykendall, U.S. Botanic Garden children’s education specialist, and Adam Kavalier, founder and CEO of Undone Chocolate, will present “The Art & Science of the Chocolate Chip Cookie,” featuring exploratory stations where visitors can learn about sugar, vanilla and chocolate. 1 to 4 p.m. Free. Conservatory, U.S. Botanic Garden, 100 Maryland Ave. SW. 202-225-8333.
- A park ranger will lead a planetarium program about the solar system, the Milky Way and other deep space objects (for ages 7 and older). 4 to 4:45 p.m. Free. Rock Creek Nature Center, 5200 Glover Road NW. 202-895-6070.
Classes and workshops
- Local yoga instructors Alia Peera and Amy Mitchell will present “Sunday Serenity: Yoga in the East Park.” 10 to 11 a.m. $5 donation suggested; reservations encouraged. Dumbarton House, 2715 Q St. NW. dumbartonhouse.org. The program will continue weekly through Aug. 27.
- The Kadampa Meditation Center will host a weekly class on meditation. 10 a.m. $6 to $12. Kadampa Meditation Center, 1787 Columbia Road NW. 202-986-2257.
- Dumbarton House will host an “English Country Dance” workshop. 1 to 3 p.m. $5. Bellevue Ballroom, Dumbarton House, 2715 Q St. NW. 202-337-2288.
- The Mount Pleasant Library will present a monthly “Family Yoga!” program. 2 p.m. Free. Children’s Room, Mount Pleasant Library, 3160 16th St. NW. 202-671-3122.
- Master Gloria DuBissette of DC Gentle East Martial Arts will present a self-defense class for women on how to fall safely and how to fight from the ground (for ages 13 and older). 2 to 4 p.m. Free. Large Meeting Room, Mount Pleasant Library, 3160 16th St. NW. 202-671-3122. The four-session series will continue Aug. 20 and 27.
- Author Ingrid Anders will facilitate a monthly reading group for writers, with participants reading a celebrated short story aloud and discussing the literary devices used by the author. 2:30 p.m. Free. Georgetown Library, 3260 R St. NW. 202-727-0232.
- The Steinway Series will feature pianist Natalia Kazaryan performing works by Haydn, Ravel and Chopin. 3 p.m. Free; tickets available in the G Street lobby at 2:30 p.m. McEvoy Auditorium, Smithsonian American Art Museum, 8th and G streets NW. 202-633-1000.
- Six emerging young pianists — prize winners of the 32nd International Young Artist Piano Competition — will perform. 6 p.m. Free. Millennium Stage, Kennedy Center. 202-467-4600.
- Mark Leithauser, senior curator and chief of design at the National Gallery of Art, will discuss “Exhibition Design From Treasure Houses of Britain to Diaghilev.” 2 p.m. Free. East Building Auditorium, National Gallery of Art, 4th Street and Pennsylvania Avenue NW. 202-737-4215.
- The Washington Jewish Film Festival’s series “For Your Consideration,” a sampling of recent Oscar submissions in the Best Foreign Language Film category, will feature Nepal’s “The Black Hen,” about growing up in a segregated village in northern Nepal during the Maoist insurgency, at 1:30 p.m.; New Zealand’s “A Flickering Truth,” a documentary about cinematic gems of the Afghani film archives that were ravaged, burned and banned by Taliban interdiction, at 3:30 p.m.; Australia’s “Tanna,” about young lovers caught between the traditions and taboos of their tribe and following their desires, at 5:30 p.m.: and Yemen’s “I Am Nojoom, Age 10 and Divorced,” a true story of underage marriage that reflects the painful reality of Yemeni tribal culture and the vulnerability of girls, at 7:45 p.m. $13.50 per screening. Edlavitch DC Jewish Community Center, 1529 16th St. NW. wjff.org.
- “Gaumont at 120: Twelve Unseen Treasures” will feature eminent Polish director Andrzej Wajda’s 1988 movie “Les possédés.” 4 p.m. Free. East Building Auditorium, National Gallery of Art, 4th Street and Pennsylvania Avenue NW. 202-737-4215.
Performances and readings
- The National Building Museum will host a “step show” performance by participants in the “Summer Steps With Step Afrika!” camp as part of its summer concert series. 2 to 3 p.m. Free. National Building Museum, 401 F St. NW. 202-272-2448.
- Poet and educator Matt Gallant will host a Jazz & Verse Open Mic event. 5 to 7 p.m. $5. Busboys and Poets Takoma, 235 Carroll St. NW. 202-726-0856.
- The Washington Nationals will play the San Francisco Giants. 1:35 p.m. $12 to $370. Nationals Park, 1500 South Capitol St. SE. 888-632-6287.
- A park ranger will lead a walk through Georgetown Waterfront Park and discuss Georgetown’s evolution from an active port town (for ages 7 and older). 11 a.m. Free. Meet at the fountain in the Georgetown Waterfront Park, Wisconsin Avenue and K Street NW. 202-895-6070.