You may have to look to the heavens for summer cool. Some spacey places to start:

* Albert Einstein Spacearium: "New Eyes on the Universe," $1 adults, 50 cents children, seniors and students. 357-2700.

* Howard B. Owens Science Center, Lanham, Md.: Three special laser shows Thurs. to Sun. until Sept. 5. "Visual Music" a family-oriented sound and light show; "Laser Drive" rock music and light for teens; "Laser Madness" rock and light for young adults. Adults $4, children and seniors $2. 577-8718.

* Rock Creek Nature Center Planetarium: "Introduction to the Night Sky," Sat. and Sun., 1 p.m., minimum age 4; "Star Dust" at 4 p.m., minimum age 7; free tickets distributed one-half hour before showtime. Tues. to Fri., various programs available for 10 or more, reservation required. 426-6829.

* University of Maryland Observatory Open House: Slide-talk presentation followed by telescope viewing, offered on the 5th and 20th of each month at 9 p.m. (DST) Reservations required for 10 or more. 454-3001.

* NASA Goddard Space Flight Center, Greenbelt: Visitor's Center exhibits of space hardware, moon rocks and shuttle craft, open for free, self-guided tours Wed. through Sun., 10 a.m. to 4 p.m. Special tours of computer center and tracking facility Thursdays at 2 p.m., or by reservation for groups of 20 or more. 344-8101.

* U.S. Naval Observatory: Slide presentation and tour of telescope domes, Mon. through Fri., 2 p.m. Bimonthly night tours often booked months in advance and require reservation. Recommended minimum age 12. 254-4569.