The Serbian Astronomical Journal is a biannual peer-reviewed scientific journal covering astronomy. The journal is the successor of the Bulletin Astronomique de Belgrade, formed by a merger of the Bulletin de l'Observatoire Astronomique de Belgrade and the Publications of the Department of Astronomy, it has been published under the present title since 1998. It is published by the Department of Astronomy, it publishes invited reviews, original scientific papers, preliminary reports, professional papers over the entire range of astronomy, astrophysics and related fields. The Serbian Astronomical Journal is abstracted and indexed by Astrophysics Data System, Chemical Abstracts, Referativni Zhurnal, EBSCO databases and Thomson Reuters products Official website
La Isleta Lighthouse is an active 19th century lighthouse on the Spanish island of Gran Canaria in the Canary islands. The lighthouse has been constructed on the rocky peninsula of La Isleta, which overlooks the Port of Las Palmas to the north of the city of Las Palmas, the capital of Gran Canaria. Situated at the north-eastern tip of the island, the La Isleta light marks the approaches to the port and lies midway between the Sardina lighthouse to the east and the Punta de Melenara lighthouse of Telde to the south. La Isleta was one of the first lighthouse to be completed as part of the original maritime lighting plan for the Canaries, is the oldest lighthouse in Gran Canaria. Designed by the engineer by Juan de León y Castillo, it became operational in 1865 and consists of a two-storey white washed building; the light is displayed from a lantern room above the building. The hilltop location of the lighthouse means that it has a focal height of 249 meters above sea level, the highest operational light in Spain.
Its light characteristic is made up of a flash of white light every twenty seconds, has a nominal range of 21 nautical miles. The optics consist of a third order Barbier, Benard, et Turenne Fresnel lens and drive system, with a 400 watt lamp; as well as acting as a maritime light, it functions as an aerial beacon used for air navigation. La Isleta was the last lighthouse on Gran Canaria to be automated in 1999 when the last keeper Augustine Becerra, retired. In July 2015 a plaque was unveiled at the lighthouse by the president of the Las Palmas Port Authority, to highlight the work of the keepers including Becerra, who had maintained the lighthouse, to mark 150 years of operation of the light. Located within a military zone of the peninsula, in an area not open to the public, the lighthouse is now operated in a semi-automatic way, receiving only periodic visits from technicians from the maritime signals team of the Port Authority of Las Palmas, it is registered under the international Admiralty number D2798 and has the NGA identifier of 113-23932.
List of lighthouses in the Canary Islands List of lighthouses in Spain Image gallery showing details of both the existing lighthouse and the original building