Check out the Sun, Moon, Mars, Jupiter, Saturn and stars tonight from 6pm to 11pm on the National Mall.
Tonight will feature everything from exhibits, to hands-on activities, telescopic viewings, and a presentation from astronomers. The festival is put together by Dr. Donald Lubowich, who is the Coordinator of Astronomy Outreach at Hofstra University. Last year, even with little publicity, over 1500 people came out for the event, and with the weather expected to be perfect with clear skies and mild temperatures, this year should be great.
The event website can be found here. Around 20 local amateur astronomers will be on hand showing everything from sunspots while the sun is still up, to the moons of Jupiter and rings of Saturn after sunset. Enjoy if you plan to attend!