Astronomy Picture of the Day ·
Gamma Ray Moon
The Astronomy Picture of the Day for April 17, 1999 is “Gamma Ray Moon,” an image. It is credited to Credit: D. Thompson (LHEA,GSFC) et al., EGRET, Compton Observatory, NASA. The original explanation runs about 180 words.
From the explanation
“What if you could see gamma rays (photons with more than 40 million times the energy of visible light)? If you could, the Moon would appear brighter than the Sun!”
— APOD editors, April 17, 1999
Read the full explanation on science.nasa.gov
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At a glance
- Date
- April 17, 1999
- Type
- Image
- Credit
- Credit: D. Thompson (LHEA,GSFC) et al., EGRET, Compton Observatory, NASA
- Copyright
- No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
- Explanation length
- About 180 words