Peter J. Cameron attributes failure of his usual
link to the NASA "Astronomy Picture of the Day"
(APOD) to the US government shutdown, and
gives a substitute link.
Here is yet another substitute link, this one
specifically to today's picture —
Related literary remarks by Nabokov —
Among the many exhilarating things Lake taught
was that the order of the solar spectrum is not
a closed circle but a spiral of tints from cadmium
red and oranges through a strontian yellow and a
pale paradisal green to cobalt blues and violets,
at which point the sequence does not grade into
red again but passes into another spiral, which
starts with a kind of lavender gray and goes on to
Cinderella shades transcending human perception.
— Pnin