Phosphorescence

noun

any bright and luminous radiating light created by something without heat
Each of them in his own tempo and with his own voice discovered and reaffirmed with astonishment the knowledge that all things are one thing and that one thing is all things—plankton, a shimmering phosphorescence on the sea and the spinning planets and an expanding universe, all bound together by the elastic string of time.
– from The Log from the Sea of Cortez, by John Steinbeck (1902 – 1962)