Astronomy Picture of the Day · October 4, 1999

The 220 Mirrors of CRTF

The Astronomy Picture of the Day for October 4, 1999 is “The 220 Mirrors of CRTF,” an image. It is credited to Credit: NSTTF, Sandia National Labs, DOE. The original explanation runs about 133 words.

From the explanation

“Even the largest of modern optical telescopes are small when compared with the light gathering power of the Central Receiver Test Facility (CRTF) located in New Mexico , USA. CRTF has 220 mirrors each over 7-meters in diameter all focused on a single tower.”

— APOD editors, October 4, 1999

Read the full explanation on science.nasa.gov

At a glance

Date: October 4, 1999
Type: Image
Credit: Credit: NSTTF, Sandia National Labs, DOE
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 133 words

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Source

Astronomy Picture of the Day, October 4, 1999 — science.nasa.gov/image-article/apod-1999-october-04-the-220-mirrors-of-crtf

Copy taken Oct 28, 2026, 2:39 AM EDT. The image and explanation belong to their creators. OpenOrbit is not affiliated with or endorsed by NASA.