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Home Astronomy

Astronomy

Buthiers Leisure Island Observatory
T510 telescope on Buthiers leisure island
Buthiers Leisure Island Planetarium
Éclipse_29-03-2025_gif-anim2
Eclipse at the Buthiers observatory2

Discover the mysteries of the universe with our "Astronomy" activity, offering access to the only observatory and planetarium open to the public all year round in the Paris region. Dive into the depths of Space and marvel at the celestial splendors. Book now for an unforgettable astronomical experience!

. . . . . . . . . . .

HEAD IN THE STARS" EVENINGS

(RESERVATION ESSENTIAL)

• Pour les groupes (par Mail ou via notre formulaire de Contact) :

Activités possibles toute l’année, en journée ou en soirée : Planétarium et/ou diaporama, fusées à eau, observations à vue et/ou dans les télescopes (selon les conditions météo).

• Pour les particuliers (Âge minimum : 8 ans) (via le bouton vert « Je réserve » – ) :

Séance de 21h à 23h : Planétarium et/ou diaporama, observations à vue et/ou dans les télescopes (selon les conditions météo).

Les vendredis 27 février, 27 mars, 24 avril, 22 mai, 19 juin, 24 juillet, 21 août, 18 septembre, 30 octobre, 27 novembre et 18 décembre 2026.

(Possibility of sleeping on site... See our "mobile homes" and other proposals, in the "Stays / ▼ Particuliers"... Please note the booking deadline!)

. . . . . . . . . . .

 • Conseil : ATTENTION ! Ne jamais regarder le soleil, même avec des lunettes de soleil !
Sans protection adéquate, l’observation directe du soleil occasionne des séquelles graves et irrémédiables !

- - -

 • Actualité : En plus des 5 planètes naines officielles du système solaire (Cérès, Pluton, Hauméa, Makémaké, Éris), en voici quelques-unes en cours de certification : Gonggong, Quaoar, Sedna, Orcus, Vanth, Farout, Farfarout… parmi des centaines d’autres !

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◄ Photos: Observatory and planetarium
◄ Photos: Partial solar eclipse - March 29, 2025
(If you're the little family in the photo, give us a call!o)
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I reserve

Practical information

Access conditions

Free parking.

Appointment 20h50 in front of the main reception!

Planetarium and observatory within walking distance (10 min)

Rates

18 € per person.

(Minimum age: 8)

Duration

2 hours: from 9:00 pm to 11:00 pm

Activity location

Planetarium and/or observatory.

Appointment 20h50 in front of the main reception!

Opening

Outside school vacations zone C

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

School vacations zone C

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Rules of procedure

Related activities

Hiking

Discover the caves of the Île de Loisirs amidst heather, rocks and pine trees!

Opening

Free access.

Rates

Free of charge.

Orienteering

100 markers, 15 circuits for beginners and experts alike. Fun for all the family!

Opening

Every day

Rates

4€ per menu.

Trail games

You'll be asking a lot of questions, running sometimes, laughing a lot, and wading a bit too... But all as a team.

Opening

Every day

Rates

25€ per game.
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  • 73, rue des Roches
    77760 Buthiers
  • Open all year round
  • 01 64 24 12 87
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Buthiers Partners Olympic Games Paris 2024, here live the games
Buthiers partner, Île de France region
Buthiers partner Département de seine et marne
Buthiers Unesco partners, Fontainebleau and Gâtinais Biosphere Reserve
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