The Stockton Astronomical Society (SAS) meets on the second Thursday of the month in the Olson Hall, Room 120 at the University of the Pacific at 7:30 pm. Visitors are welcome.

    A monthly star party is usually held on a Saturday near a new moon.


Coming Up     [view SAS Sky Calendar  (143.3KB PDF file) May 2015]

Sunday, May 3 -- Full Moon
Saturday, May 9 at sunset -- Highway 4 Star Party
Thursday, May 14 at 7:30 pm -- Regular Meeting of SAS  in Olson Hall, Room 120, at UOP
Saturday, May 16 at sunset -- High Altitude Star Party
Sunday, May 17 -- New Moon
Friday, May 22 at 8:00 pm -- Sky Tours at Delta College -- (Athletic-1 parking lot)
Saturday, May 23 at 8:15 pm -- Public Star Party at Oak Grove Regional Park


SAS News

SAS May 14th Meeting

Stockton Astronomical Society presents

Tom Greene  

The James Webb Space Telescope: Science Potential and Project Status

The unprecedented sensitivity and resolution of the James Webb Space Telescope (JWST) will significantly advance a broad variety of astrophysics soon after it is launched in 2018. Its large (6.5-m diameter) primary mirror and infrared instruments will allow it to see some of the very first luminous objects that formed in the Universe after the Big Bang. Other major science themes of JWST encompass studying the assembly of galaxies, the birth of stars and planetary systems, and planetary systems and the origins of life.

JWST will be the premier astrophysics space observatory for NASA and the European Space Agency over its 5 - 10 year mission lifetime, supplanting the Hubble Space Telescope (which primarily works at visible and ultraviolet light wavelengths). In addition to the topics covered in this talk, many scientists will use JWST to make discoveries that we have not yet imagined.

JWST employs many unique technologies, and the mission has been in development for over 10 years. Many major hardware components - all large optics and all science instruments - have been completed, and integration of major components has begun. In this talk I will illustrate the mission's science potential and highlight the status of this development effort.

...Tom Greene


What's to See Tonight

Astronomy in the News

Thinking of Buying a Star?

California's First Astronomical Observatory

Picture of the Day

Weather Information

From the US Naval Observatory

From NASA Space Place Program


The Stockton Astronomical Society (SAS) was founded as a non-profit California corporation to foster interest in and promote the general knowledge of astronomy and related sciences.

Member: International Dark-Sky Association
Member: Astronomical Association of Northern California
Member: Night Sky Network



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