Astronomy Picture of the Day ·
The Spiral North Pole of Mars
The Astronomy Picture of the Day for December 19, 2017 is “The Spiral North Pole of Mars,” an image. It is credited to Image Credit: ESA / DLR / FU Berlin ; NASA MGS MOLA Science Team. The original explanation runs about 158 words.
From the explanation
“Why is there a spiral around the North Pole of Mars? Each winter this pole develops a new outer layer about one meter thick composed of carbon dioxide frozen out of the thin Martian atmosphere.”
— APOD editors, December 19, 2017
Read the full explanation on science.nasa.gov
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At a glance
- Date
- December 19, 2017
- Type
- Image
- Credit
- Credit: Image Credit: ESA / DLR / FU Berlin ; NASA MGS MOLA Science Team
- Copyright
- No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
- Explanation length
- About 158 words