June 27 through August 30: THE POOL IS OPEN every day from 10:30 a.m. to 7:00 p.m.

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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!

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"SOLUNE 2026" TRIP – TOTAL SOLAR ECLIPSE IN SPAIN – Wednesday, August 12, 2026"

(RESERVATION REQUIRED VIA THIS LINK)

The“SOLUNE 2026”trip combines a total solar eclipse with travel.

We’ll depart by minibus on Tuesday, August 11, 2026, in the morning from the Buthiers Recreation Island and arrive in Spain in the late afternoon. The next day, after a day of sightseeing, we’ll head to the path of totality to enjoy the total solar eclipse. The observation site may change on the day of the event, depending on the weather… Return to the hotel before midnight. Day trip or sightseeing on the 13th. Return to Buthiers on August 14.

PDF: Program and Services – Poster – Addenda to the Terms and Conditions of Sale (Special Eclipse Edition)

Price (including tax): €450 per person (single occupancy in a single room)
Price (including tax): €435 per person (couple in a double room with two single beds)
Very limited availability!
(No children allowed)

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HEAD IN THE STARS" EVENINGS

(RESERVATION ESSENTIAL)

• For groups (by email or through our contact form):

Activities available year-round, during the day or in the evening: Planetarium and/or slide show, water rockets, visual observations and/or observations through telescopes (weather permitting).

• For individuals (Minimum age: 8 years old) (via the green “Book Now” button – ) :

Session from 9:00 p.m. to 11:00 p.m.: Planetarium and/or slide show, visual observations and/or observations through telescopes (weather permitting).

See the POSTER : Fridays, July 24, August 21, September 18, October 30, November 27, and December 18, 2026.

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

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 • Tip:WARNING! Never look directly at the sun, even with sunglasses!
Without proper protection, looking directly at the sun can cause serious and irreversible damage!

- - -

 • News: In addition to the five official dwarf planets in the solar system (Ceres, Pluto, Haumea, Makemake, and Eris), here are a few that are currently undergoing certification: Gonggong, Quaoar, Sedna, Orcus, Vanth, Farout, Farfarout… among hundreds of others!

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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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