Happening at OLA

Astronomical Observations

From Tuesday to Saturday at 18h30. During this two hour session, 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: Melo e Simas, the portuguese astronomer who tested Einstein?

17th Nov 17th, 18h30. Professora Ana Simões (CIUHCT/U. Lisboa) presents us Melo e Simas who was much more than the only astronomer who dared to confirm the bending of light trajectories, one of Einstein general theory of relativity predictions.


Activities for Schools

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

Young astronomers – Sundials

Saturday the 10th of November, the planed activity is the construction of a sundial where concepts such as solar time, the time on our watch, movement of rotation and translation of our planet are explored.


Equipment Rental

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

Astronomer for one night

Night of November 10th to 11th. Follow the usage of OLA’s main telescope and in the end, take the pictures with you. Learn more about Astronomy and Astrofotography, in this activity where our guests are the on duty astronomers


Astrophotographer for one night

On the night of the 29th of December. In just two hours, the participants are introduced and practice in our park the definitions that cameras must have in order to give the first steps into landscape astrophotography.

Astronomy Course I: The solar system

12th and 13th of january. This is the first of three modules coordinated by professor Rui Agostinho. Topics on the formation of the solar system, the life of our star the Sun and the comets will be given. Suitable for all backgrounds and ages.


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″

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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

Conjuctions Solar Visibility
2018/11/15 14:54 - Lua em Quarto Crescente
2018/11/16 04:17 - Lua em conjunção com Marte 0°59'19.2"
2018/11/17 00:00 - Chuva de Estrelas Leonidas
2018/11/17 06:02 - Lua em conjunção com Neptuno 2°43'55.4"
2018/11/18 00:00 - Chuva de Estrelas Leonidas
2018/11/20 19:41 - Lua em conjunção com Úrano 4°49'57.8"
2018/11/23 05:39 - Lua Cheia
2018/11/23 21:37 - Lua em conjunção com Aldebaran -1°41'50.0"
Hoje dia 2018/11/15 (Tempos em UTC)

O Sol nasce às: 07:10:38
no azimute de 113.1°
O Meio-dia Solar ocorre às 12:14:03
com o Sol a uma altura de 33°
O Sol põe-se às: 17:17:05
no azimute de 246.7°