Astronomical Observations

Discover our catalog of interactive astronomical observations.

Real-time explorations

Solar system

Explore space, navigate and visualize the different stars of the solar system by yourself, in real time.

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Constellations

Observe the constellations in real time from a chosen position.

Explore

Eclipses

Solar eclipse

View the solar eclipse of August 26, 2026.

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Éclipse lunaire

View the lunar eclipse of March 3, 2026

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Planets

Mercury

Observation
  • Diameter : 4879.4 km |
  • Average temperature : 167 ° |
  • Sidereal day : 58,6458 jours |
  • Revolution : 87.969 days |
  • weight : 3,3011x10^23 kg

The planet closest to the Sun. Small and rocky, it experiences extreme temperature differences between day and night.

RotationRevolution

Venus

Observation
  • Diameter : 12103.6 km |
  • Average temperature : 464 ° |
  • Sidereal day : -243,023 jours |
  • Revolution : 224.667 days |
  • weight : 4.8675x10^24 kg

Almost twin to Earth in size, but covered with toxic clouds. It is the hottest planet in the solar system.

RotationRevolution

Earth

Observation
  • Diameter : 12756.274 km |
  • Average temperature : 15 ° |
  • Sidereal day : 23h 56min 4s |
  • Revolution : 365.256363 days |
  • weight : 5.9736x10^24 kg

The only planet known to be home to life. Largely covered with water and protected by a favorable atmosphere.

RotationRevolution

Mars

Observation
  • Diameter : 6792.4 km |
  • Average temperature : -63 ° |
  • Sidereal day : 24,622962 h |
  • Revolution : 686.885 days |
  • weight : 6,4185x10^23 kg

The red planet, famous for its iron-rich soil. It is home to the largest mountains and canyons in the solar system.

RotationRevolution

Jupiter

Observation
  • Diameter : 142984 km |
  • Average temperature : -163 ° |
  • Sidereal day : 9h 55min 27,3s |
  • Revolution : 4332.01 days |
  • weight : 1,8986x10^27 kg

The largest planet in the solar system. A gaseous giant with a tormented atmosphere, it has a famous storm: the Great Red Spot.

RotationRevolution

Saturn

Observation
  • Diameter : 120536 km |
  • Average temperature : -191.9 ° |
  • Sidereal day : 10h 33min |
  • Revolution : 10754 days |
  • weight : 5,6846x10^26 kg

Known for her beautiful rings made of ice and rock. She is a gas giant like Jupiter.

RotationRevolution

Uranus

Observation
  • Diameter : 51118 km |
  • Average temperature : -216 ° |
  • Sidereal day : -17,23992 h |
  • Revolution : 30698 days |
  • weight : 8,681x10^25 kg

Icy giant with a blue-green hue due to methane in its atmosphere. It is tilted to the side, which makes it unique.

RotationRevolution

Neptune

Observation
  • Diameter : 49528 km |
  • Average temperature : -226 ° |
  • Sidereal day : 16h 6,6min |
  • Revolution : 60216.8 days |
  • weight : 1,0243x10^26 kg

The planet furthest from the Sun. Very windy and cold, it has a beautiful blue color and intense storms.

RotationRevolution

Moons

Moon

The Moon is the only natural satellite of Earth. Visible in the night sky, it influences the tides

See

Simulations

Sizes comparator

Observe and compare the real sizes of the planets and the sun.

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Constellations

Orion constellation

See

Stars :

  • Betelgeuse,
  • Rigel,
  • Bellatrix,
  • Mintaka,
  • Alnilam,
  • Alnitak,
  • Saiph,
  • Meissa,
  • Pi1 Orionis,
  • Pi3 Orionis (Tabit),
  • Pi4 Orionis,
  • Mu Orionis,
See all the stars

Ursa Major constellation

See

Stars :

  • Alioth,
  • Dubhe,
  • Mizar,
  • Alkaid,
  • Merak,
  • Phecda,
  • Megrez,
See all the stars

Ursa Minor constellation

See

Stars :

  • Polaris,
  • Delta Ursae Minoris,
  • Epsilon Ursae Minoris,
  • Zeta Ursae Minoris,
  • Kochab,
  • Pherkad,
  • Eta Ursae Minoris,
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Aquila constellation

See

Stars :

  • Altair,
  • Alshain,
  • Tarazed,
  • Deneb Al Okab Borealis,
  • Deneb Al Okab Australis,
  • Theta Aquilae,
  • Eta Aquilae,
  • Iota Aquilae,
  • Lambda Aquilae,
  • Delta Aquilae,
See all the stars

Andromeda constellation

See

Stars :

  • Alpheratz,
  • Mirach,
  • Almach,
  • Upsilon Andromedae,
  • Delta Andromedae,
  • Zeta Andromedae,
  • Eta Andromedae,
  • Theta Andromedae,
  • Iota Andromedae,
  • Kappa Andromedae,
  • Lambda Andromedae,
  • Nu Andromedae,
  • Mu Andromedae,
  • Phi Andromedae,
See all the stars

Cassiopeia constellation

See

Stars :

  • Alpha Cassiopeiae,
  • Beta Cassiopeiae,
  • Gamma Cassiopeiae,
  • Delta Cassiopeiae,
  • Epsilon Cassiopeiae,
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Aries constellation

See

Stars :

  • Hamal,
  • Sheratan,
  • Mesarthim,
  • 53 Arietis,
See all the stars

Taurus constellation

See

Stars :

  • Aldebaran,
  • Elnath,
  • Alcyone,
  • Epsilon Tauri,
  • Zeta Tauri,
  • Theta2 Tauri,
  • Lambda Tauri,
  • Omicron Tauri,
  • Atlas,
  • Gamma Tauri,
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Gemini constellation

See

Stars :

  • Castor,
  • Pollux,
  • Alhena,
  • Mebsuta,
  • Tejat,
  • Propus,
  • Wasat,
  • Mekbuda,
  • Theta Geminorum,
  • Kappa Geminorum,
  • Lambda Geminorum,
  • Xi Geminorum,
  • Nu Geminorum,
  • Tau Geminorum,
  • Iota Geminorum,
  • Upsilon Geminorum,
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Cancer constellation

See

Stars :

  • Tarf,
  • Acubens,
  • Asellus Australis,
  • Asellus Borealis,
  • Iota Cancri,
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Leo constellation

See

Stars :

  • Regulus,
  • Denebola,
  • Algieba,
  • Zosma,
  • Ras Elased Australis,
  • Adhafera,
  • Chort,
  • Al Minliar al Asad,
  • Alterf,
  • Ras Elased Borealis,
  • Eta Leonis,
See all the stars

Virgo constellation

See

Stars :

  • Spica,
  • Zavijava,
  • Porrima,
  • Vindemiatrix,
  • Zaniah,
  • Syrma,
  • Heze,
  • Minelauva,
  • Theta Virginis,
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Libra constellation

See

Stars :

  • Zuben elgenubi,
  • Zuben eschamali,
  • Sigma Librae,
  • Gamma Librae,
  • Upsilon Librae,
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Scorpius constellation

See

Stars :

  • Antares,
  • Shaula,
  • Sargas,
  • Dschubba,
  • Grafias,
  • Lesath,
  • Alniyat,
  • Jabbah,
  • Acrab,
  • Kappa Scorpii,
  • Tau Scorpii,
  • Eta Scorpii,
  • Epsilon Scorpii,
  • Mu2 Scorpii,
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Sagittarius constellation

See

Stars :

  • Kaus Australis,
  • Nunki,
  • Kaus Media,
  • Alnasl,
  • Rukbat,
  • Arkab Prior,
  • Tau Sagittarii,
  • Phi Sagittarii,
  • Albaldah,
  • Psi Sagittarii,
  • Xi2 Sagittarii,
  • Ascella,
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Capricorn constellation

See

Stars :

  • Deneb Algedi,
  • Dabih,
  • Algedi,
  • Nashira,
  • Zeta Capricorni,
  • Mu Capricorni,
  • Omega Capricorni,
  • Psi Capricorni,
  • Theta Capricorni,
  • Iota Capricorni,
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Aquarius constellation

See

Stars :

  • Sadalsuud,
  • Sadalmelik,
  • Skat,
  • Sadachbia,
  • Albali,
  • Sadaltager,
  • Hydor,
  • Ancha,
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Pisces constellation

See

Stars :

  • Alrescha,
  • Alpherg,
  • Gamma Piscium,
  • Theta Piscium,
  • Iota Piscium,
  • Omega Piscium,
  • Delta Piscium,
  • Epsilon Piscium,
  • Omicron Piscium,
  • Phi Piscium,
  • Upsilon Piscium,
  • Tau Piscium,
  • Lambda Piscium,
  • Kappa Piscium,
See all the stars

Carina constellation

See

Stars :

  • Canopus,
  • Miaplacidus,
  • Avior,
  • Aspidiske,
  • Theta Carinae,
  • Omega Carinae,
  • Upsilon Carinae,
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Puppis constellation

See

Stars :

  • Naos,
  • Pi Puppis,
  • Rho Puppis,
  • Tau Puppis,
  • Sigma Puppis,
  • Xi Puppis,
  • Nu Puppis,
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Boötes constellation

See

Stars :

  • Arcturus,
  • Izar,
  • Princeps,
  • Nekkar,
  • Seginus,
  • Rho Boötis,
  • Muphrid,
See all the stars

Cetus constellation

See

Stars :

  • Menkar,
  • Kaffaljidhma,
  • Lambda Ceti,
  • Mu Ceti,
  • Nu Ceti,
  • Mira,
  • Zeta Ceti,
  • Theta Ceti,
  • Eta Ceti,
  • Iota Ceti,
  • Diphda,
  • Tau Ceti,
  • Upsilon Ceti,
See all the stars

Auriga constellation

See

Stars :

  • Capella,
  • Menkalinan,
  • Hassaleh,
  • Almaaz,
  • Haedus,
  • Theta Aurigae,
See all the stars

Centaurus constellation

See

Stars :

  • Alpha Centauri A,
  • Beta Centauri,
  • Epsilon Centauri,
  • Gamma Centauri,
  • Delta Centauri,
  • Zeta Centauri,
  • Mu Centauri,
  • Theta Centauri,
  • Eta Centauri,
  • Iota Centauri,
See all the stars

Cepheus constellation

See

Stars :

  • Alpha Cephei,
  • Beta Cephei,
  • Eta Cephei,
  • Gamma Cephei,
  • Iota Cephei,
  • Delta Cephei,
  • Zeta Cephei,
See all the stars

Lyra constellation

See

Stars :

  • Vega,
  • Zeta Lyrae,
  • Beta Lyrae,
  • Gamma Lyrae,
  • Delta2 Lyrae,
See all the stars

Cygnus constellation

See

Stars :

  • Deneb,
  • Gamma Cygni,
  • Epsilon Cygni,
  • Zeta Cygni,
  • Delta Cygni,
  • Iota² Cygni,
  • Eta Cygni,
  • Beta Cygni,
See all the stars

Corvus constellation

See

Stars :

  • Alpha Corvi,
  • Beta Corvi,
  • Gamma Corvi,
  • Delta Corvi,
  • Epsilon Corvi,
See all the stars

Crater constellation

See

Stars :

  • Alkes,
  • Beta Crateris,
  • Delta Crateris,
  • Gamma Crateris,
  • Theta Crateris,
  • Epsilon Crateris,
  • Zeta Crateris,
  • Eta Crateris,
See all the stars

Corona Australis constellation

See

Stars :

  • Meridiana,
  • Beta Coronae Australis,
  • Gamma Coronae Australis,
  • Delta Coronae Australis,
  • Epsilon Coronae Australis,
  • Zeta Coronae Australis,
  • Theta Coronae Australis,
See all the stars

Corona Borealis constellation

See

Stars :

  • Alphecca,
  • Nusakan,
  • Gamma Coronae Borealis,
  • Delta Coronae Borealis,
  • Epsilon Coronae Borealis,
  • Iota Coronae Borealis,
  • Theta Coronae Borealis,
See all the stars

Delphinus constellation

See

Stars :

  • Sualocin,
  • Rotanev,
  • Aldulfin,
  • Delta Delphini,
  • Gamma1 Delphini,
See all the stars

Draco constellation

See

Stars :

  • Eltanin,
  • Beta Draconis,
  • Nu1 Draconis,
  • Grumium,
  • Altais,
  • Epsilon Draconis,
  • Chi Draconis,
  • Aldhibah,
  • Athebyne,
  • Theta Draconis,
  • Edasich,
  • Thuban,
  • Kappa Draconis,
  • Giausar,
See all the stars

Eridanus constellation

See

Stars :

  • Cursa,
  • Mu Eridani,
  • Nu Eridani,
  • Beid,
  • Zaurak,
  • Pi Eridani,
  • Rana,
  • Ran,
  • Zibal,
  • Azha,
  • Tau1 Eridani,
  • Tau3 Eridani,
  • Tau5 Eridani,
  • Tau8 Eridani,
  • Tau9 Eridani,
  • Theemin,
  • Acamar,
  • Iota Eridani,
  • Kappa Eridani,
  • Phi Eridani,
  • Chi Eridani,
  • Achernar,
See all the stars

Sagitta constellation

See

Stars :

  • Sham,
  • Beta Sagittae,
  • Gamma Sagittae,
  • Delta Sagittae,
See all the stars

Canis Major constellation

See

Stars :

  • Sirius,
  • Mirzam,
  • Theta Canis Majoris,
  • Omicron2 Canis Majoris,
  • Wezen,
  • Adhara,
  • Furud,
  • Aludra,
See all the stars

Triangulum constellation

See

Stars :

  • Alpha Trianguli,
  • Beta Trianguli,
  • Gamma Trianguli,
See all the stars

Piscis Austrinus constellation

See

Stars :

  • Fomalhaut,
  • Epsilon Piscis Austrini,
  • Delta Piscis Austrini,
  • Beta Piscis Austrini,
  • Mu Piscis Austrini,
  • Iota Piscis Austrini,
See all the stars

Canis Minor constellation

See

Stars :

  • Procyon,
  • Gomeisa,
See all the stars

Equuleus constellation

See

Stars :

  • Kitalpha,
  • Beta Equulei,
  • Gamma Equulei,
  • Delta Equulei,
See all the stars

Perseus constellation

See

Stars :

  • Mirfak,
  • Algol,
  • Gamma Persei,
  • Delta Persei,
  • Epsilon Persei,
  • Zeta Persei,
  • Xi Persei,
See all the stars

Lupus constellation

See

Stars :

  • Uridim,
  • Beta Lupi,
  • Delta Lupi,
  • Phi1 Lupi,
  • Gamma Lupi,
  • Epsilon Lupi,
  • Eta Lupi,
  • Kappa1 Lupi,
  • Zeta Lupi,
  • Chi Lupi,
  • Rho Lupi,
  • Theta Lupi,
  • Sigma Lupi,
See all the stars

Pegasus constellation

See

Stars :

  • Enif,
  • Biham,
  • Homam,
  • Markab,
  • Scheat,
  • Algenib,
  • Matar,
  • Sadalbari,
  • Iota Pegasi,
See all the stars

Hercules constellation

See

Stars :

  • Rasalgethi,
  • Kornephoros,
  • Gamma Herculis,
  • Omega Herculis,
  • Zeta Herculis,
  • Epsilon Herculis,
  • Delta Herculis,
  • Xi Herculis,
  • Omicron Herculis,
  • Pi Herculis,
  • Eta Herculis,
  • Tau Herculis,
  • Chi Herculis,
  • Theta Herculis,
  • Iota Herculis,
See all the stars

Lepus constellation

See

Stars :

  • Arneb,
  • Nihal,
  • Gamma Leporis,
  • Delta Leporis,
  • Epsilon Leporis,
  • Zeta Leporis,
  • Eta Leporis,
  • Theta Leporis,
  • Kappa Leporis,
  • Lambda Leporis,
  • Mu Leporis,
See all the stars

Hydra constellation

See

Stars :

  • Alphard,
  • Beta Hydrae,
  • Gamma Hydrae,
  • Delta Hydrae,
  • Epsilon Hydrae,
  • Zeta Hydrae,
  • Eta Hydrae,
  • Theta Hydrae,
  • Iota Hydrae,
  • Lambda Hydrae,
  • Mu Hydrae,
  • Nu Hydrae,
  • Xi Hydrae,
  • Pi Hydrae,
  • Upsilon1 Hydrae,
  • Sigma Hydrae,
See all the stars

Ophiuchus constellation

See

Stars :

  • Alpha Ophiuchi (Rasalhague),
  • Cebalrai,
  • Gamma Ophiuchi,
  • Yed Prior,
  • Sabik,
  • Theta Ophiuchi,
  • Kappa Ophiuchi,
  • Zeta Ophiuchi,
  • Nu Ophiuchi,
  • Phi Ophiuchi,
See all the stars

Serpens constellation

See

Stars :

  • Unukalhai,
  • Beta Serpentis,
  • Gamma Serpentis,
  • Delta Serpentis,
  • Epsilon Serpentis,
  • Mu Serpentis,
  • Iota Serpentis,
  • Xi Serpentis,
  • Eta Serpentis,
  • Theta Serpentis,
See all the stars