1.1st photo - observing on rooftop at 60 Garden St

CfA's "Observatory Nights" series welcomes the public to attend—free of charge—a nontechnical lecture on astronomy on the third Thursday evening of each month. Other special events of astronomical interest are also presented during the year.

1.2 photo - cluster NGC 206 is located in M31

Talks on a wide variety of topics in astronomy, astrophysics, and related research bring speakers from the US and elsewhere to CfA's weekly discussions. Most talks are organized by CfA's science divisions.

5th photo - spiral galaxy formation simulation

CfA's schedule of colloquia, seminars, lunchtime talks, and other CfA and related events is posted every Friday—and updated as needed—for the following week.