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.

Young astronomers

On Saturday January 20th 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.


Activities for Schools

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

Astrophotographer for one night

27th January. Initiative for those who already do photography and want to start doing landscape astrophotography.


Equipment Rental

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

Astronomy Course II: Astronomical Observations

3rd February. This is the second of three modules coordinated by Nuno Santos, of OLA’s team. In this module the apparent motions of the celestial sphere, the constellations, measurement of angles in the sky and technics for observing astronomical objects are going to be explored.


Astronomer for a night

16th February. Follow the usage of OLA's main telescope and in the end, take the pictures with you. Learn more about astronomy and astrophotography, in this activity where our guests are the on-duty astronomers

Science Café – Popular misconceptions in Astronomy

20th of January. In astronomy, because it deals with celestial phenomena, popular beliefs are abundant. Prof. João Lin Yun (IA, U. Lisbon) will address several of these incorrect ideas with the audience collaboration in an interactive game using our smartphones.

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.

Startrails_20151021_Nuno Santos_OLAA

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
2018/01/24 00:37 - Vénus no afélio 0.728 UA
2018/01/24 01:09 - Lua em conjunção com Úrano 4°40'45.6"
2018/01/24 22:20 - Lua em Quarto Crescente
2018/01/25 09:20 - Mercúrio no afélio 0.467 UA
2018/01/27 10:34 - Lua em conjunção com Aldebaran -0°40'48.1"
2018/01/30 09:57 - Lua no perigeu 358993.523 km
2018/01/31 13:26 - Lua Cheia
2018/01/31 13:29 - Eclipse Lunar Total
Hoje dia 2018/01/22 (Tempos em UTC)

O Sol nasce às: 07:41:53
no azimute de 114.7°
O Meio-dia Solar ocorre às 12:41:03
com o Sol a uma altura de 32°
O Sol põe-se às: 17:40:34
no azimute de 245.5°