A rayleigh = 106 photons emitted in all directions per cm2 vertical column per second. Rayleighs are used to measure the luminous intensity of the aurora.
Rayleigh is a lunar crater that lies along the northeast limb of the Moon. This feature is seen from the side by observers on the Earth, making it difficult to see much detail. In addition, libration effects can completely hide this crater from due.
Rayleigh is a parliamentary constituency represented in the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament (MP) by the first past the post system of election.