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Friday, April 12, 2019
8:00 PM - 10:00 PM
Cahill, Hameetman Auditorium

Stargazing Lecture

NASA's Spitzer Space Telescope: Revealing the Invisible
Marja Seidel, Staff Scientist, IPAC, Caltech,

NASA's Spitzer Space Telescope, one of the four great NASA Observatories, observes the universe in the infrared. It essentially operates as an enormous pair of night-vision goggles, allowing it to perceive invisible "heat" radiation and pierce through dust clouds, something impossible for visible light. Because of its unique view of the sky, Spitzer has achieved major discoveries in almost every area of astrophysics. It has detected some of the oldest galaxies in our universe, discovered a new ring around Saturn, and observed the seven Earth-sized planets in the TRAPPIST-1 exoplanetary system. Now, after 16 years of continuous operation, well exceeding its planned 2.5-year primary mission duration, Spitzer is set to retire in the next year. Come discover the universe in the infrared and the remarkable legacy the NASA Spitzer Space Telescope has provided.

About the Series

Stargazing Lectures are free lectures at a public level followed by guided stargazing with telescopes (weather permitting). All events are held at the Cahill Center for Astronomy and Astrophysics at Caltech. No reservations are needed. Lectures are 30 minutes; stargazing lasts 90 minutes. Stay only as long as you want.

Stargazing is only possible with clear skies, but the lecture, slideshow, and Q&A takes place regardless of weather.

For directions, weather updates, and more information, please visit:

Download the series flyer (PDF)

For more information, please contact Cameron Hummels by email at