Local Group barycenter
E549962
The Local Group barycenter is the common center of mass around which all the galaxies in the Local Group, including the Milky Way and Andromeda, gravitationally orbit.
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical object
ⓘ
barycenter ⓘ gravitational center of mass ⓘ |
| definedAs |
center of mass about which Local Group galaxies orbit
ⓘ
common center of mass of all matter in the Local Group ⓘ |
| differentFrom |
Galactic Center
NERFINISHED
ⓘ
Milky Way barycenter NERFINISHED ⓘ Solar System barycenter NERFINISHED ⓘ |
| frameOfReferenceFor | relative motion of Local Group galaxies ⓘ |
| governedBy |
Newtonian gravity
NERFINISHED
ⓘ
conservation of momentum ⓘ |
| governsMotionOf |
Andromeda Galaxy
NERFINISHED
ⓘ
Local Group dwarf galaxies NERFINISHED ⓘ Milky Way NERFINISHED ⓘ Triangulum Galaxy NERFINISHED ⓘ |
| hasApproximateLocation | on the line connecting the Milky Way and Andromeda ⓘ |
| hasMajorContributors |
Andromeda Galaxy
NERFINISHED
ⓘ
Local Group dark matter ⓘ Local Group dwarf galaxies NERFINISHED ⓘ Milky Way NERFINISHED ⓘ Triangulum Galaxy NERFINISHED ⓘ |
| hasProperty |
dominated by Milky Way and Andromeda masses
ⓘ
influenced by dark matter halos of Local Group galaxies ⓘ located between Milky Way and Andromeda ⓘ moves as mass distribution in Local Group evolves ⓘ not fixed in space ⓘ position depends on Milky Way–Andromeda mass ratio ⓘ |
| hasUncertainty | exact position depends on uncertain galaxy and dark matter masses ⓘ |
| influencedBy |
large-scale structure gravitational field
ⓘ
mass of the Virgo Supercluster ⓘ tidal forces from nearby galaxy groups ⓘ |
| orbitsWith |
Andromeda Galaxy
NERFINISHED
ⓘ
Local Group satellite galaxies NERFINISHED ⓘ Milky Way NERFINISHED ⓘ Triangulum Galaxy NERFINISHED ⓘ |
| partOf | Local Group NERFINISHED ⓘ |
| relatedTo |
Local Group mass distribution
ⓘ
Local Group potential well ⓘ Milky Way–Andromeda system NERFINISHED ⓘ |
| temporalBehavior | position changes over cosmological timescales ⓘ |
| usedIn |
N-body simulations of Local Group
ⓘ
modeling dynamics of Local Group ⓘ reference frame definitions for Local Group dynamics ⓘ studies of Milky Way–Andromeda orbital parameters ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.