Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Where is the Biggest Telescope?
Name: carol r fisher
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: 1993 - 1999

Where is the biggest telescope in the world?

I would have to guess. So why don't you try looking under "telescopes" or "astronomy" in your favorite encyclopedia?


The Keck Observatory on Mauna Kea, Hawaii is one of the largest with an effective primary mirror diameter of 400 in. Palomar in CA with a mirror of 200 in. was the largest for many years until the Russians built one slightly larger.


Check out this link, for a listing of telescopes. According to the site, it is the Gran Telescopio CANARIAS (GTC) in the Canary Islands.


Click here to return to the Astronomy Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory