51 Mannakee St.
Rockville, MD 20850
There is ample and free parking around the Science Center. Parking lot #11 is closest. You do not need an MC permit to park on campus Friday evenings.
Use the main entrance and take the stairs or elevator to the 4th floor. You should be in Stairwell 1 or Elevator 1. The Observatory Guest Nights begin in room SC 406. If you are late and the group has already gone up to the roof, one of our students will assist you in getting upstairs.
Campus maps and directions can be found here.