in the sky long after sunset, and the light of the first band of horizontal light at sunrise, the "true dawn" ( ). According to the vast majority of Muslim scholars, astronomical dawn is considered the true dawn. Practitioners of Islam use Muhammad's descriptions of zodiacal light to avoid errors in determining the timing of daily prayers. Brian May In 2007, Brian May, lead guitarist with the band Queen, completed his thesis, A Survey of Radial Velocities in the Zodiacal Dust Cloud, thirty-six years after abandoning it to pursue a career in music. He was able to submit it only because of the minimal amount of research on the topic undertaken during the intervening years. May describes the subject as being one that became "trendy" again in the 2000s. Other planets Other planets, like Venus or Mercury, have shown to have rings of interplanetary dust in their orbital spaces. See also Exozodiacal dust Interplanetary dust cloud Kordylewski cloud Optical phenomenon Zodi References External links Reach, W. T. (1997). "The structured zodiacal light: IRAS, COBE, and ISO observations". Diffuse Infrared Radiation and the IRTS. ASP Conference Series. 124, 33–40 "Zodiacal Light and the Gegenschein", an essay by J. E. Littleton Zodiacal Light and the False Dawn September 25, 2007 Zodiacal Light Over Laguna Verde October 29, 2009 Zodiacal light as seen from above the Himalayan Hills in Uttarakhand, India Solar System Light sources Observational astronomy