The Sun through a telescope and the planetarium, by day at the Parc Astronòmic

By day, the Parc Astronòmic del Montsec swaps the stars for the nearest one: the Sun. The session is shorter and cheaper than the night one, doesn't depend on it getting dark and fits into a morning or an afternoon in Àger, before lunch or between the collegiate church and the gorge.

Film, planetarium and the Sun live

The general daytime experience lasts about an hour and a half and is led by a Parc specialist. The first hour is in L'Ull del Montsec, the 12-metre mobile-dome planetarium: a film about the space race and the arrival on the Moon, then a guided tour of the sky and the universe. The following half hour is outside, in the telescope park: the guide explains the Sun and its activity, and if the sky allows you look at it live with the solar telescopes. With your ticket you can see the permanent astronomy exhibition and the Starlight Room, dedicated to light pollution, at your leisure. There are sessions in Spanish and in Catalan, and a 2D or 3D version.

Price and ages

It costs €10 per person and €9 reduced, in 2D or 3D. The reduced rate is for under-15s, retired people, people with disabilities, large or single-parent families, young people with a Tarifa Jove and groups of more than 20 with a booking, with the card in hand. Under-5s don't pay. The general one is recommended from age 10: with younger children, the Parc advises its family sessions.

Mosaics de Llum, for the little ones

For families with children from age 5, Mosaics de Llum lasts 1 h 45: a planetarium with the film Hazelnuts, about two squirrels, and an optics workshop in which you make mosaics with polarised sheets, inspired by Gaudí's trencadís. Same price as the general one. It is scheduled on individual dates, one or two a month from March to November, except October in 2026; the last one of 2026 was on 7 November, so the next will be in 2027, when the Parc publishes the calendar.

Before you go

The Parc is on the Coll d'Ares track, about 3.5 km from the centre of Àger, and you can only get there by car or by chartered coach; it has visitor parking. The dates and times of each session are in the calendar on its website, where tickets are bought; for queries, call 973 053 022, Monday to Friday from 9:00 to 15:00. Tickets are not refunded or changed to another date because of the weather. If it is cloudy, the planetarium part goes ahead and the Sun observation depends on the sky. There is no café, only machines with drinks and something to nibble. The whole building is wheelchair accessible.

Morning of Sun, night of stars

It is plan B for an overcast day and the complement to a night in the mountains: in the morning you understand the Sun, and at night you come back for the session with telescopes. For lunch, Cal Maciarol is a kilometre away, on the same track, and in the village, Casa Xalets opens at midday Tuesday to Sunday.