In 2015 we celebrated the International Year of Light, which is the "messenger" of astrophysical phenomena, and it was also the 30th anniversary of the official inauguration of the Headquarters of the IAC and of the Canary Island Observatories. This caused the IAC to organize, in Tenerife and La Palma, the exhibition "Lights of the Universe". The first edition of Paralajes pays tribute to these past events, with articles on a variety of luminous phenomena in the Universe: eclipses, airglow, polar aurorae, the zodiacal light, among other, and about the main science highlights of the IAC during the past 30 years, and about solarigraphy, which "freezes" the tracks of the Sun in the sky.