Astronomy Picture of the Day ·
Ninety Gravitational Wave Spectrograms and Counting
The Astronomy Picture of the Day for December 7, 2021 is “Ninety Gravitational Wave Spectrograms and Counting,” an image. It is credited to Image Credit: NSF , LIGO , VIRGO , KAGRA , Georgia Tech , Vanderbilt U. ; Graphic : Sudarshan Ghonge & Karan Jani. The original explanation runs about 156 words.
From the explanation
“Every time two massive black holes collide , a loud chirping sound is broadcast out into the universe in gravitational waves . Humanity has only had the technology to hear these unusual chirps for the past seven years, but since then we have heard about 90 — during the first three observing runs.”
— APOD editors, December 7, 2021
Read the full explanation on science.nasa.gov
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At a glance
- Date
- December 7, 2021
- Type
- Image
- Credit
- Credit: Image Credit: NSF , LIGO , VIRGO , KAGRA , Georgia Tech , Vanderbilt U. ; Graphic : Sudarshan Ghonge & Karan Jani
- Copyright
- No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
- Explanation length
- About 156 words