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Artist’s View of Planetary System in Globular Cluster M4

Artist's View of Planetary System in Globular Cluster M4
A rich starry sky fills the view from an ancient gas-giant planet in the core of the globular star cluster M4, as imagined in this artist's concept. The 13-billion-year-old planet orbits a helium white-dwarf star and the millisecond pulsar B1620-26, seen at lower left. The globular cluster is deficient in heavier elements for making planets, so the existence of such a world implies that planet formation may have been quite efficient and common in the early universe.

About the Object

  • R.A. Position
    R.A. PositionRight ascension – analogous to longitude – is one component of an object's position.
    16h 23m 35.4s
  • Dec. Position
    Dec. PositionDeclination – analogous to latitude – is one component of an object's position.
    -26° 31' 31.9"
  • Constellation
    ConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.
    Scorpius
  • Distance
    DistanceThe physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs.
    M4 is roughly 5,600 light-years (1,720 parsecs) from the Earth.
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    B1620-26, M4, Messier 4, NGC 6121
  • Object Description
    Object DescriptionThe type of astronomical object.
    Globular Cluster
  • Release Date
    July 10, 2003
  • Science Release
    Oldest Known Planet Identified
  • Credits
    NASA and G. Bacon (STScI)

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Details

Last Updated
Feb 17, 2025
Contact
Media

Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov