For general access to the Wolfram Knowledgebase, use entities of type Exoplanet instead of ExoplanetData.


gives the value of the specified property for the exoplanet entity.


gives a list of property values for the specified exoplanet entities.


gives the specified annotation associated with the given property.


  • ExoplanetData[] gives a list of all exoplanet entities.
  • ExoplanetData["Properties"] gives a list of available properties.
  • The specified entity in ExoplanetData can be an Entity, EntityClass, entity canonical name, or list thereof.
  • The specified property can be an EntityProperty, EntityPropertyClass, property canonical name, or list of properties.
  • Properties that do not apply or are not known in a particular case are indicated by Missing[].
  • Properties include:
  • "AlphanumericName"alphanumeric name
    "AlternateNames"alternate names
    "AltitudeTransit"next transit altitude
    "AngularDiameterFromEarth"angular diameter as seen from Earth
    "AngularRadiusFromEarth"angular radius as seen from Earth
    "ApparentAltitude"apparent altitude
    "AverageOrbitDistance"average orbit distance
    "AzimuthRise"azimuth at rise
    "AzimuthSet"azimuth at set
    "BooleanRise"above the horizon
    "DailyTimeAboveHorizon"daily time above horizon
    "Density"mean density
    "Diameter"average diameter
    "DiameterInterval"lower and upper bounds of the diameter
    "DiscoveryMethod"discovery method
    "DiscoveryYear"discovery year
    "DistanceFromEarth"distance from Earth
    "DistanceFromSun"distance from Sun
    "DistanceInterval"lower and upper bounds of the distance from Earth
    "DurationTransit"transit duration
    "Eccentricity"orbital eccentricity
    "EccentricityInterval"lower and upper bounds of the eccentricity
    "EscapeVelocity"escape velocity
    "GalacticLatitude"galactic latitude
    "GalacticLongitude"galactic longitude
    "GravitationalConstantMassProduct"standard gravitational parameter
    "GreenwichHourAngle"Greenwich hour angle
    "HelioCoordinates"heliocentric XYZ coordinates
    "Inclination"orbital inclination
    "InclinationInterval"lower and upper bounds of the inclination
    "LocalHourAngle"local hour angle
    "MajorAxis"major axis
    "MassInterval"lower and upper bounds of the mass
    "MaximalAltitudeTime"next maximum altitude time
    "MinorAxis"minor axis
    "MomentOfInertia"rotational moment of inertia
    "OrbitCenter"orbit center
    "OrbitCircumference"orbit circumference
    "OrbitPeriod"orbital period
    "OrbitPeriodInterval"lower and upper bounds of the orbital period
    "PeriapsisLongitude"longitude of periapsis
    "PeriapsisLongitudeInterval"lower and upper bounds of the longitude of periapsis
    "PlanetaryEquilibriumTemperature"planetary equilibrium temperature
    "PlanetaryEquilibriumTemperatureInterval"lower and upper bounds of the planetary equilibrium temperature
    "PrimaryStarKSemiamplitude"primary star K semiamplitude
    "Radius"average radius
    "RadiusInterval"lower and upper bounds of the radius
    "RightAscension"right ascension
    "RiseTime"next rise
    "RocheLimit"Roche limit
    "SemimajorAxis"semimajor axis
    "SemimajorAxisInterval"lower and upper bounds of the semimajor axis
    "SemiminorAxis"semiminor axis
    "SetTime"next set
    "SiderealHourAngle"sidereal hour angle
    "SurfaceArea"surface area
    "TransitDepth"transit depth
    "TransitTime"next transit time
  • Some properties are available for ExoplanetData as a whole and can be given using the form ExoplanetData[property]. Such properties include:
  • "Entities"all available entities
    "EntityCount"total number of available entities
    "Classes"all available entity classes
    "EntityClassCount"total number of available entity classes
    "SampleEntities"list of sample entities
    "SampleEntityClasses"list of sample entity classes
    "EntityCanonicalNames"list of all entity canonical names
    "PropertyCanonicalNames"list of all property canonical names
    "EntityClassCanonicalNames"list of all entity class canonical names
    "RandomEntities"pseudorandom sample entities
    {"RandomEntities",n}n pseudorandom entities
    "RandomEntityClasses"pseudorandom sample entity classes
    {"RandomEntityClasses",n}n pseudorandom entity classes
  • The following annotations can be used in the third argument of ExoplanetData[entity,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
    "Source"source information for the property
    "Date"the date associated with the entity-property value (if any)
    "PhysicalQuantity"the physical quantity associated with the entity-property value
    "Unit"the unit associated with the entity-property value
    "EntityAssociation"an association of entities and entity-property values
    "PropertyAssociation"an association of properties and entity-property values
  • If a function is provided as an annotation, it will be used to aggregate the result data. Typical aggregation functions include:
  • Minthe minimum value
    Maxthe maximum value
    Meanthe mean value
    Commonestthe most frequently occurring value
    Medianthe median value
    Totalreturns the total
    Lengththe number of elements


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Basic Examples  (3)

Use for discovery:

Find the mass of an exoplanet:

Get a list of exoplanets in a specified class:

Scope  (3)

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

Date qualifiers can also be specified using Dated:

Location qualifiers can accept an explicit GeoPosition, location-based Entity objects, or queries that evaluate to one of these:

The "Uncertainty" qualifier can accept several possible values and controls how uncertainty is represented in the result:

Properties that make use of the "Uncertainty" qualifier can be found with:

Applications  (8)

Create a chart showing the number of exoplanets discovered per year:

Create a chart plotting the radius versus mass:

Create a chart plotting the mass versus orbital period colored by discovery method:

Create a chart plotting the density versus radius:

Create a chart plotting the orbital eccentricity versus orbital period colored by discovery method:

Create a chart plotting the density versus radius:

For each exoplanet, find all of the other exoplanets in the system:

Gather the data based on the number of exoplanets in the system:

Plot eccentricity versus semimajor axis for systems containing one, two, or three exoplanets:

Plot radius versus orbit period on a log-log scale:

The habitable zone of an exoplanet is an ambiguous concept with no agreed-upon definition. There are several ways to go about determining what you might interpret as the habitable zone. All methods have a relation to their host star. The planetary equilibrium temperature is a form of blackbody temperature for a given planet. It does not take into account greenhouse gases or other factors that could influence habitability on a planet. You can query for planets in a given system that have a planetary equilibrium temperature between 0 and 100 Celsius:

There are other ways of determining the habitable zone, such as that described in Whitmire, D. and Reynolds, R. "Circumstellar Habitable Zones: Astronomical Considerations." In Doyle, L. (Ed.). Circumstellar Habitable Zones, Proceedings of the First International Conference. Travis House Publications, 1996: 117142. This method allows you to determine an inner and outer radius of the habitable zone around a star:

Introduced in 2014