"America's Adventure in Space," a three-month retrospective of films made by the National Aeronautics and Space Administration, begins tomorrow at the National Archives with showings of "Universe." The series was organized to commemorate the 10th anniversary of the moon landing. Free performances are scheduled each Thursday at 7:30 p.m. in the fifth-floor theater of the National Archives Building. For further information on the series and individual programs, call 523-3000.

The local openings of "The Concorde-Airport "79," an irresistibly busy, silly new installment in the ongoing airborne cliffhanger, have been postponed a week to Friday, Aug. 10. Irwin Allen's "Beyond the Poseidon Adventure," which appeared to be headed for instant retirement, will now reemerge this Friday for a commercial run at several area theaters.Popular demand will extend the reissue of "Jaws" through Thursday, Aug. 9.

Booking dates remain firm on "Breaking Away," "North Dallas Forty" and "More American Graffiti" this Friday. A new Disney farce, "Unidentified Flying Oddball," is scheduled for Wednesday. "Rust Never Sleeps," a rock personality-performance film with Neil Young, is headed for the Key in both Georgetown and College Park on Wednesday or Aug. 15. The Key management also plans the local premiere of "Dark Star," the obscure science-fiction satire written by Dan O'Bannon, now famous for "Alien," and directed by John Carpenter, now famous for "Halloween," at both theaters on either Aug. 22 or 29.

The satirical farce "Americathon," built around the idea of a telethon staged to bail out a bankrupt U.S.A. at the end of the century, and a new Farrah Fawcett-Majors attraction, "Sunburn," are supposed to join "The Concorde" on Aug. 10. "Hot Stuff," a comedy starring Dom DeLuise as a bunco cop involved in a Sting-type operation, and "The Seduction of Joe Tynan," a political melodrama starring Alan Alda, open on Friday, Aug. 17. DeLuise also made his debut as a film director on "Hot Stuff."

The Italian import "Down and Dirty" moves into the West End Circle today. The Circle management also anticipates late August openings for the Australian feature "Newsfront" and the latest Laura Antonelli sex-show, "Till Marriage Do Us Part."

To answer several inquiries, "Apocalypse Now" is scheduled to open somewhere in the Washington area on Oct. 5. The picture has yet to be bid or booked here. Local openings are scheduled the same day for "Starting Over," a dramatic comecy about a marital breakup costarring Burt Reynolds, Jill Clayburgh and Candice Bergen, and the marvelous new time-travel adventure fantasy, "Time After Time," directed by Nicholas Meyer from his adaptation of a newly published novel by Karl Alexander, with Malcolm McDowell as H.G. Wells pursuing David Warner as Jack the Ripper into contemporary San Francisco.

The final summer session of "Introduction to Motion Picture Screen-writing," Sheldon Tromberg's five-week immersion in practical knowledge and exercise for aspiring screen-writers is scheduled to begin on Monday, Aug. 20. Detailed information may be obtained by calling the instructor at 966-7799 ir 244-1818.

Many thanks to all the erudite moviegoers who have written or called with the information that the "mystery" Lou Gehrig Western was "Rawhide" of 1938. Larry Powell of the Savannah Morning News & Evening Press recalls that Smith Ballew, the actual Western star of "Rawhide," provided the voice of "Singin' Sandy" for John Wayne's brief tenure as a singing cowboy in the early '30s. Ballew worked as a band vocalist before ending up in "B" Westerns. A new mystery: Has anyone seen an early 1942 release called "The Ninth Inning," which apparently featured Gehrig, Babe Ruth and other members of the New York Yankees?

The planned revival of "The Searchers" at the Embassy Circle has been postponed until sometime in September. While waiting, enthusiasts might find it satisfying to read Alan LeMay's original novel, a stirring book whose quality has been obscured by movie critics celebrating the virtues, real and imagined, of John Ford's movie version.