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Stratospheric Terahertz Observatory

STO, the Stratospheric Terahertz Observatory, is a balloon-borne 80 cm telescope with 4-pixel cryogenic heterodyne receiver arrays at 1.4 to 1.9 THz, exploring the Milky Way in the far-infrared [CII] and [NII] lines.  STO had a successful 14-day Antarctic flight in January 2012.  For more information see the Stratospheric Terahertz Observatory website.


Principal Investigator : Prof. Chris Walker

For the public
For Public

Public events include our Monday Night Lecture Series, world-reknowned Astronomy Camp and Mt Lemmon Sky Center.

For Students

A good place to start if you want to become an undergrad major or grad student, or need to find our schedule of classes.


For Scientists
For Scientists

Find telescopes and instruments, telescope time applications, staff and mountain contacts, and faculty and staff scientific interests.