Night SkyAnalemma Society

The United Nations General Assembly designated 2009 as the International Year of Astronomy.

Current News on the Observatory Park

The sundial is open on weekends with clear weather, and we will be open Friday Nights for observing (weather permitting).

Normal viewing hours for Observatory Park on Friday Nights are:
Winter Hours (1 Nov through 15 April) 7:00 to 9:30 PM Closed if temperature below 20 degrees or snow is on the ground)

Summer Hours (16 April through 31 October) Sunset to 10:30 PM

Special observing events on other dates will be by announcement

The Observatory Project passes a major milestone. The telescope has arrived!

K-12 Students: Tell us why Science is Cool!
Click here for the USA Science & Engineering Festival Kavli Science Video Contest winners!

Our Current Project: Observatory Park

The Analemma Society has exciting plans for an Observatory Park at Turner Farm, supported by the Fairfax County Park Authority. The park will help the Analemma Society to achieve their goal of promoting science education through astronomy in the Northern Virginia area.

Great Falls, Virginia
Latitude N 38o 59' 40", Longitude W 77o 18' 45"

The Analemma Society, formed in 1998, is developing a park where students can learn abut the origin and nature of science as well as experience first hand the wonders of the Universe.

Observatory Park is an excellent place for students from Northern Virginia Schools and members of the community to observe and learn about the day and night sky.

Support Observatory Park and get involved by becoming a member of the Analemma Society or make a contribution.


Astronomical Events Calendar 2015

6 February Jupiter Opposition*
20 March Spring Equinox
4 April Total Lunar Eclipse (Morning Hours)
23 May Saturn Opposition*
21 June Summer Solstice
30 June Venus and Jupiter form pair in the west
14 August Perseid Meteor Shower
23 September Fall Equinox
28 September Total Lunar Eclipse (Evening Hours)
22 December Winter Solstice




The Analemma Society hosts viewings of the night sky in Observatory Park on Friday evenings. A weather watch is provided below and we have a clear sky clock to closely monitor conditions for viewings each week. Please take a look and come out to join us!


Click for Great Falls, Virginia Forecast