Astronomy Picture of the Day ·
Cas A: Optical and X-ray
The Astronomy Picture of the Day for January 17, 2013 is “Cas A: Optical and X-ray,” an image. It is credited to Image Credit: X-ray – NASA , JPL-Caltech, NuSTAR ; Optical – Ken Crawford ( Rancho Del Sol Obs. ). The original explanation runs about 117 words.
From the explanation
“The aftermath of a cosmic cataclysm, supernova remnant Cassiopeia A (Cas A) is a comfortable 11,000 light-years away. Light from the Cas A supernova, the death explosion of a massive star, first reached Earth just 330 years ago.”
— APOD editors, January 17, 2013
Read the full explanation on science.nasa.gov
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At a glance
- Date
- January 17, 2013
- Type
- Image
- Credit
- Credit: Image Credit: X-ray – NASA , JPL-Caltech, NuSTAR ; Optical – Ken Crawford ( Rancho Del Sol Obs. )
- Copyright
- No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
- Explanation length
- About 117 words