Happening at OLA


Astronomical Observations

From Tuesday to Saturday, at 18h30. Learn to find the polar star, identify the constellations and know their legends, relate stellar colours with their ages, observe star clusters, nebulas and faraway galaxies with the help of our telescopes.

Science Café – 2019: 50 years of the Man on the Moon and 100 years of Eddington at Prince

April 14th, at 21h30. On this Science Café we intend to outline two of important anniversaries: the 50 years of the first time man walked on the Moon and the centenary of the solar eclipse of May 29th 1919. By José Saraiva, Joana Latas e Rosa Doran.


Activities for Schools

Check here the available activities for schools, from the 1st grade up to the 12th grade.

Stargazing Guides course

The observatory organizes its second edition of the Stargazing guides course. This course is dedicated to those who want to conduct a stargazing session either at OLA or independently.


Equipment Rental

The observatory offers a wide range of astronomical equipment for rental, such as telescopes, mounts and cameras.

OLA’s Messier Marathon

April 14th. On this night, OLA organizes its first Messier marathon. This is an ambitious challenge. To observe 110 objects from Messier catalogue in a single night. In order to do so, we will have several telescopes available to those who want to join us in this challenge.


Young astronomers

On Saturday 24th of March, the planned activity is the construction of portable spectroscopes, where questions such as the nature and composition of light are explored, as well as the information that is possible to extract from the analysis of stellar light.

Astronomical concert

On the 31st of March, Ricardo Carriço presents his album - O meu Mundo - during an astronomical concert with stargazing and telescope observations.

Observatório do Lago Alqueva - OLA

Located inside of the Dark Sky Reserve in Alentejo, OLA aims that our visitors find a pleasant place to discover the Universe and learn more about Astronomy and astrophotography, in one of the areas of Europe most protected against the light poluttion of big cities.


Email: geral@olagoalqueva.pt
Tel: (+351) 960 361 906
GPS: N 38 ° 26′ 35.5″ W 7 ° 22′ 01.5″

Main Building

Houses the reception and shop, the bookshop and the auditorium. It has a dome with a telescope for the night sky observations. The visitors can enjoy the view onto the Alqueva lake and village of Monsaraz. On the foreground the sundial where one can learn how to measure the local time from the direction of hour shadow.

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Observation Platforms

The observation platform is located at the center of the observatory field. It is used as a support structure for large groups of astronomers and has a central role on the organization of star parties. It consists of a solid surface where tripods and pillars can be installed for telescopes and binoculars as well as other support equipment and with access to the electricity grid.


It is the main room where events such as talks, courses, workshops or even concerts happen. There are always two photography exhibitions displayed from either young or well known authors

Observation Dome

This is the structure that houses the main telescope of the observatory. The quality of the telescope here installed enable us to acquire images of great quality and beauty

ConjuctionsSolar Visibility
2018/03/24 15:35 - Lua em Quarto Crescente
2018/03/26 17:12 - Lua no perigeu 369105.619 km
2018/03/28 14:02 - Lua em conjunção com Regulus -1°00'54.5"
2018/03/29 00:15 - Vénus em conjunção com Úrano 0°04'24.6"
2018/03/31 12:36 - Lua Cheia
2018/04/02 11:50 - Marte em conjunção com Saturno 1°16'04.1"
2018/04/03 14:13 - Lua em conjunção com Júpiter -3°53'34.2"
2018/04/07 12:34 - Lua em conjunção com Saturno -1°55'35.9"
Hoje dia 2018/03/24 (Tempos em UTC)

O Sol nasce às: 06:26:48
no azimute de 87.5°
O Meio-dia Solar ocorre às 12:35:45
com o Sol a uma altura de 53.1°
O Sol põe-se às: 18:45:20
no azimute de 272.8°