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Information Technology Services Division
COS Website

COS Help

Can't find what you need?

If you have questions about the COS instrument or issues relating to your COS data, a member of the Spectrographs Branch will be glad to help you: please email

Note, however, that the helpdesk software cannot handle attachments and may not be able to ingest messages larger than 64 Kb. If you have tables and/or images relevant to your question, please make a note of that in your message and wait to send them until you are contacted by a staff member.

If this site's content is incorrect or missing, or you are experiencing technical problems, please contact the COS web curator via

Navigate Our Website

STScI's web site has six major sections.
All information on STScI's website is accessible through at least one of these sections.

The Institute
Find out about the Institute's staff members: who we are, where we are, what we do, what's going on, what employment opportunities there are, and how to get in touch with us.
The Hubble Space Telescope is STScI's first major mission. Here you'll find instrumentation descriptions, instructions for writing and submitting observing proposals, how to retrieve and analyze HST data, and images from the telescope.
The James Webb Space Telescope is STScI's next major mission.
Community Missions
The Community Missions Office supports a diverse portfolio of smaller missions initiated by the science community using their varied experience, products, and services.
Data Archives
The Multi-Mission Archive at Space Telescope--MAST--hosts data from the HST, the Digitized Sky Survey, the Guide Star Catalog, and many NASA missions.
News and Outreach
A site devoted to informing the public about Astronomy and HST, and providing educational resources for teachers.
The Institute offers a wide range of information services and software tools to astronomers and the public. Many of these resulted from our work on the HST mission, others are initiatives of our scientific and technical staff, and still more will come from our work on JWST and future missions.

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