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Just turn down the lights, or place filters on LEDs that narrow the spectra of light they shine down.STREETLIGHTS, ESPECIALLY SUPER BRIGHT LEDS, MAY HARM INSECT POPULATIONSJONATHAN LAMBERTAUGUST 31, 2021SCIENCE NEWS
The spectra of light coming from spiral nebulae was similar enough to that of the Milky Way that they could be similar objects, he maintained.A CENTURY OF ASTRONOMY REVEALED EARTH’S PLACE IN THE UNIVERSELISA GROSSMANJULY 21, 2021SCIENCE NEWS
It includes light spectra for more than three million astronomical objects.HUGE ARC OF GALAXIES IS SURPRISING AND PUZZLING COSMOLOGISTSLISA GROSSMANJULY 7, 2021SCIENCE NEWS FOR STUDENTS
The spectra of the metals of the alkaline earths are equally definite, though more complicated.COOLEY'S CYCLOPDIA OF PRACTICAL RECEIPTS AND COLLATERAL INFORMATION IN THE ARTS, MANUFACTURES, PROFESSIONS, AND TRADES..., SIXTH EDITION, VOLUME IARNOLD COOLEY
It is science when the astronomer compares the spectrum of the sun with the spectra of various metals in the laboratory.THE ASTRONOMY OF THE BIBLEE. WALTER MAUNDER
Gamma-ray spectra are collected all day, first from a sample, then from its accompanying standard.THE ATOMIC FINGERPRINTBERNARD KEISCH
The two gamma-ray spectra you obtain look like those in the figure on the opposite page.THE ATOMIC FINGERPRINTBERNARD KEISCH
Spectra of stars, per contra, appear relatively simple, since their feeble light is insufficient to bring out faint details.A TEXT-BOOK OF ASTRONOMYGEORGE C. COMSTOCK