Star formation is incredibly inefficient. Compared to the available amount of gas in molecular clouds, only a few percent of the cloud forms stars. In this talk, I will talk about how dust is created, grows, and destroyed in the interstellar medium (ISM). Understanding the size and evolution of dust grains in ISM is significant in answering why star formation is a very inefficient process in the universe.

Wondering what's happening above your head in the sky this month? Find out more about the Zodical Light to the Messier Marathon to everything in between, including comets, planets and spaceflights!

Learn about the World Asterisms Project and hear from expert panelists about storytelling and astronomy.

Join us online to learn basic astronomy that you can do on your own from your backyard! We'll share tips on encouraging girls to engage in astronomy and highlight the women of Harvard who laid the foundation of modern astronomy.

Join us online to learn basic astronomy that you can do on your own from your backyard! The spring sky hosts both very bright stars and very dim galaxies. We'll talk about the system astronomers use to measure and report the brightness of celestial objects - from luminosity to absolute and apparent brightness, to surface brightness.

Join us online to learn basic astronomy that you can do on your own from your backyard! With the moon waxing in the evening sky, this is the perfect time to watch the terminator slide across the giant and ancient lunar basin of Mare Imbrium.

Are aliens real? What are UFOs? Are there planets that can support life? Get your answers and more at our symposium on extraterrestrial life

Come join Alex Innanen as they cover a brief history of Curiosity’s mission, highlight some of its exciting findings, and discuss the challenges of working remotely on another planet.

Enter a Digital Portable Planetarium and take a journey through the universe led by a DDO astronomer. We’ll tour the night sky, travel through space, and see immersive full dome movies. The unscripted format will allow guests to experience a variety of topics. Ask our astronomer questions and see the answers in a planetarium setting. Please note that all guests will sit on a clean floor. A registered adult must accompany all registered participants under the age of 16.

Dr.Guan will walk through how mapping the sky in millimeter has significantly advanced our knowledge of the universe, ranging from its early history and fundamental building blocks, to the magnetic field morphology of our galaxy.