Astronomy Picture of the Day · October 20, 2001

The Radio Sky: Tuned to 408MHz

The Astronomy Picture of the Day for October 20, 2001 is “The Radio Sky: Tuned to 408MHz,” an image. It is credited to Credit: C. Haslam et al., MPIfR , SkyView. The original explanation runs about 166 words.

From the explanation

“Tune your radio telescope to 408MHz (408 million cycles per second) and check out the Radio Sky! You should find that frequency on your dial somewhere between US broadcast television channels 13 and 14.”

— APOD editors, October 20, 2001

Read the full explanation on science.nasa.gov

At a glance

Date: October 20, 2001
Type: Image
Credit: Credit: C. Haslam et al., MPIfR , SkyView
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 166 words

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On this day: October 20 in other years

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Source

Astronomy Picture of the Day, October 20, 2001 — science.nasa.gov/image-article/apod-2001-october-20-the-radio-sky-tuned-to-408mhz

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.