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Planets in our solar system.

Entity ["Planet" ,name] or

represents an entity of type "Planet" .

[prop]

gives the value of a specified property.

[{prop1,…}]

gives the value of a list of properties.

[prop,{qualivali,…}]

gives the value of a specified property modified by qualifier rules quali->vali.

[Dated [prop,date]]

gives the value of a property associated with a particular date specification.

EntityClass ["Planet" ,{propispeci,…}]

represents a class of entities with values of propi defined by speci.

Sample Entities

  • …

Sample Entity Classes

  • …

Properties

  • AbsoluteMagnitudeH absolute magnitude H
    Age age
    Albedo albedo
    AlphanumericName alphanumeric name
    AlternateNames alternate names
    Altitude altitude
    AltitudeMaximum next maximum altitude
    AngularDiameterFromEarth angular diameter
    AngularRadiusFromEarth angular radius
    Aphelion largest distance from the Sun
    Apoapsis largest distance from Sun
    ApoapsisTime next apoapsis time
    ApoapsisTimeLast last apoapsis time
    ApparentAltitude apparent altitude
    ApparentMagnitude apparent magnitude
    AscendingNodeLongitude longitude of ascending node Ω
    AtmosphericComposition atmospheric composition
    AtmosphericPressure atmospheric pressure
    AtmosphericScaleHeight atmospheric scale height
    AuthalicDiameter authalic diameter
    AuthalicRadius authalic radius
    AverageDistanceFromEarth average distance from Earth
    AverageOrbitalCentripetalForce average orbital centripetal force
    AverageOrbitDistance average orbit distance
    AverageOrbitVelocity average orbit velocity
    AverageTemperature average temperature
    AverageVelocityAroundSun average heliocentric velocity
    Azimuth azimuth
    BondAlbedo bond albedo
    BooleanRise above the horizon
    Classes classes
    Color color
    Constellation constellation
    CylindricalEquidistantTexture cylindrical equidistant texture
    DailyTimeAboveHorizon daily time above horizon
    Declination declination
    Density mean density
    Diameter average diameter
    Discoverers discoverers
    DiscoveryDate discovery date
    DistanceFromEarth distance from Earth
    DistanceFromSun distance from Sun
    EccentricAnomaly eccentric anomaly
    Eccentricity orbital eccentricity
    EffectiveTemperature effective temperature
    EntityClasses entity classes
    EntityTypeList entity type list
    EquatorialAngularVelocity equatorial angular velocity
    EquatorialCircumference equatorial circumference
    EquatorialDiameter equatorial diameter
    EquatorialFrequency equatorial frequency
    EquatorialRadius equatorial radius
    EquatorialVelocity equatorial velocity
    EscapeVelocity escape velocity
    FarthestPlanet farthest planet
    GalacticLatitude galactic latitude
    GalacticLongitude galactic longitude
    GeocentricEclipticLatitude geocentric ecliptic latitude
    GeocentricEclipticLongitude geocentric ecliptic longitude
    Glyph astrological symbol
    GravitationalConstantMassProduct gravitational constant mass product
    Gravity gravity
    GreenwichHourAngle Greenwich hour angle
    HeliocentricEclipticLatitude heliocentric ecliptic latitude
    HeliocentricEclipticLongitude heliocentric ecliptic longitude
    HelioCoordinates heliocentric ecliptic XYZ coordinates
    HelioVelocityVector heliocentric velocity vector
    HillRadius Hill radius
    Image image
    Inclination orbital inclination
    LocalHourAngle local hour angle
    MajorAxis orbital major axis
    Mass mass
    MaximalAltitudeTime next maximum altitude time
    MaximumOrbitalCentripetalForce maximum orbital centripetal force
    MaximumTemperature maximum temperature
    MeanAnomaly mean anomaly
    MeanMotion mean motion
    MinimumOrbitalCentripetalForce minimum orbital centripetal force
    MinimumTemperature minimum temperature
    MinorAxis orbital minor axis
    MomentOfInertia rotational moment of inertia
    MoonCount number of moons
    Moons moons
    NAIFIdentifier NAIF identifier
    Name name
    NearestPlanet nearest planet
    NorthPoleDeclination north pole declination
    NorthPoleRightAscension north pole right ascension
    ObjectType object type
    Oblateness oblateness
    Obliquity obliquity
    OppositionTimeLast last opposition time
    OppositionTimeNearest nearest opposition time
    OppositionTimeNext next opposition time
    OrbitalAngularMomentum orbital angular momentum
    OrbitalCentripetalForce orbital centripetal force
    OrbitalKineticEnergy orbital kinetic energy
    OrbitalMomentOfInertia orbital moment of inertia
    OrbitCenter orbit center
    OrbitCircumference orbit circumference
    OrbitPath orbit path
    OrbitPeriod orbital period
    OrbitRules orbit rules
    Periapsis smallest distance from Sun
    PeriapsisArgument argument of periapsis ω
    PeriapsisLongitude longitude of periapsis ϖ
    PeriapsisTime next periapsis time
    PeriapsisTimeLast last periapsis time
    Perihelion nearest distance from the Sun
    PolarCircumference polar circumference
    PolarDiameter polar diameter
    PolarRadius polar radius
    Radius average radius
    RetrogradeApparentMotionQuery apparent direction
    RightAscension right ascension
    RingSystemInnerDiameter ring system inner diameter
    RingSystemInnerRadius ring system inner radius
    RingSystemOuterDiameter ring system outer diameter
    RingSystemOuterRadius ring system outer radius
    RingSystemThickness ring system thickness
    RingSystemWidth ring system width
    RiseTime next rise
    RocheLimit Roche limit
    RotationalAngularMomentum rotational angular momentum
    RotationPeriod rotation period
    Satellites known satellites
    SemimajorAxis orbital semimajor axis
    SemiminorAxis orbital semiminor axis
    SetTime next set
    Shape shape
    SiderealHourAngle sidereal hour angle
    SolarConjunctionTimeLast last solar conjunction time
    SolarConjunctionTimeNearest nearest solar conjunction time
    SolarConjunctionTimeNext next solar conjunction time
    SolarDay solar day
    SolidAngleFromEarth solid angle
    SphereOfInfluenceRadius sphere of influence radius
    StationaryOrbitRadius stationary orbit radius
    StationaryOrbitSpeed stationary orbit speed
    SurfaceArea surface area
    TexturedSurface 3D graphic
    TransitTime next transit time
    TrueAnomaly true anomaly
    VelocityAroundSun instantaneous heliocentric velocity
    Volume volume
    VolumetricDiameter volumetric diameter
    VolumetricRadius volumetric radius
    ZenithAngle zenith angle

Details

  • "Planet" entities include all eight planets recognized by the International Astronomical Union.
  • "Planet" entity classes include inner and outer planets in addition to ringed planets.
  • Some properties are available for the "Planet" entity type as a whole and can be given using the form EntityValue ["Planet" ,property]. Such properties include:
  • "Properties" the list of available properties
    "PropertyCanonicalNames" the standard names of available properties
    "SampleEntities" a sample list of available entities (typically of length 10)
    "SampleEntityClasses" a sample list of available entity classes (typically of length 10)
    "EntityCount" number of entities available
    "Entities" the list of available entities
    "EntityCanonicalNames" the standard names of available entities
    "EntityClasses" the list of available entity classes
    "EntityClassCanonicalNames" the standard names of available entity classes
    "PropertyClasses" the list of available property classes
    "PropertyClassCanonicalNames" the standard names of available property classes
    "PropertyCount" number of properties available
  • The following annotations can be used in the third argument of EntityValue ["Planet" ,property,annotation]:
  • "Source" source information for the property
    "Date" the date associated with the entity-property value (if any)
    "EntityAssociation" an association of entities and entity-property values
    "PropertyAssociation" an association of properties and entity-property values
    "EntityPropertyAssociation" an association in which the specified entities are keys, and values are a nested association of properties and entity-property values
    "PropertyEntityAssociation" an association in which the specified properties are keys, and values are a nested association of entities and entity-property values
    "Dataset" a dataset in which the specified entities are keys, and values are an association of property names and entity-property values
  • The following annotations can be used in the second argument of EntityValue [property,annotation]:
  • "Qualifiers" the list of possible qualifiers for the property
    "QualifierValues" the list of possible values that can be given to each qualifier
    "DefaultQualifierValues" the list of default values for the property's qualifiers
    "Description" a brief textual description of the property
    "Definition" a detailed textual definition of the property
    "PhysicalQuantity" the physical quantity associated with the entity-property value
    "Unit" the unit associated with the entity-property value
  • A qualifier value of Automatic indicates that an applicable format of values can be used; e.g. for the "Date" qualifier, this includes a proper date or date span.

Examples

open all close all

Basic Examples  (10)

Use for discovery:

Find the mass of a planet:

Get a list of the planets:

Retrieve a dataset of all available properties for an entity:

Find the three most massive planets:

Find the radius of each planet:

Find the next rise time for a planet at your location and time:

Get a list of classes of planets:

Find the planets in a given class:

Make a graphic of solar system orbit paths:

Scope  (18)

The solar system planets:

Orbital eccentricity for each planet:

Orbital periods in sidereal years:

Rules for the orbital elements of Earth:

Obliquity of each planet:

Albedo of each planet:

An image of Jupiter:

The known satellites of Neptune:

Diameter of each satellite:

Orbit semimajor axis:

Number of known satellites for each planet:

Compute positions for Venus in the morning sky for 2009:

Implicit Entity Classes  (1)

Represent all of the planets with fewer than 15 moons:

Get a list of all the planets:

Property Classes  (1)

Represent equatorial coordinates properties associated with planets:

Get a list of available property classes for planets:

Find the list of properties included in a property class:

Obtain the property values for the properties in a property class for an entity:

Qualifiers  (5)

Some properties accept qualifiers:

The "Location" qualifier, which specifies the location of the observer, can accept an explicit GeoPosition , location-based Entity objects or queries that evaluate to one of these:

Dates  (4)

Date qualifiers can accept an explicit DateObject or queries that evaluate to a DateObject :

Date qualifiers can also be specified using Dated :

Compute the ecliptic path for a planet over the course of a year:

The paths for the visible planets:

The distance from Earth to the visible planets over a year:

The apparent magnitude of the visible planets as viewed from Earth over a year:

Geo Computation  (1)

Create maps of planets:

Applications  (2)

Make a table of densities of planets:

Log-log plot of orbital period versus distance for the planets, illustrating Kepler's third law:

Relations to Other Entity Types  (3)

"Planet" entities have natural satellites from the "PlanetaryMoon" domain:

Atmospheric composition is specified using "Chemical" entities:

"Planet" entities can be combined with "SolarSystemFeature" entities to create maps with labeled features:

Possible Issues  (2)

Pluto is not included in the list of solar system planets:

It is now considered a "dwarf planet":

Some information is unknown, for a variety of different reasons:

Neat Examples  (1)

Plot the orbit period versus the orbit semimajor axis for planets in the solar system:

See Also

EntityValue

Entity Types: PlanetaryMoon   MinorPlanet   Exoplanet   Comet   SolarSystemFeature   MeteorShower

Interpreter Types: Planet   ComputedPlanet

Text Contents: Planet

History

Introduced in 2014 (10.0)

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