Sagittarius Stream

E117415

astronomical structure stellar stream tidal stream

The Sagittarius Stream is a vast, looping ribbon of stars encircling the Milky Way, created as tidal forces tear apart the infalling Sagittarius Dwarf Spheroidal Galaxy.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (5)

Label	Occurrences
Sagittarius Stream canonical	2
Sagittarius stream	2
Sagittarius tidal stream	2
Sagittarius stellar stream	1
Sgr stream	1

How this entity was disambiguated

This entity first appeared as the object of triple T992639 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Sagittarius Stream
Context triple: [Sagittarius Dwarf Spheroidal Galaxy, forms, Sagittarius Stream]

A. Magellanic Stream
The Magellanic Stream is a vast, trailing ribbon of gas stretching across the sky, stripped from the Magellanic Clouds as they interact gravitationally with the Milky Way.
B. Sagittarius Dwarf Spheroidal Galaxy
The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
C. Sagittarius Arm
The Sagittarius Arm is one of the main spiral arms of the Milky Way galaxy, rich in star-forming regions and nebulae, located between the galactic center and the outer Perseus Arm.
D. Gould Belt
The Gould Belt is a nearby, partial ring of young stars, gas, and star-forming regions tilted to the Milky Way’s plane and encompassing many of the bright constellations visible from Earth.
E. Milky Way subgroup
The Milky Way subgroup is the collection of nearby galaxies gravitationally bound to and dominated by the Milky Way within the larger Local Group.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Sagittarius Stream
Target entity description: The Sagittarius Stream is a vast, looping ribbon of stars encircling the Milky Way, created as tidal forces tear apart the infalling Sagittarius Dwarf Spheroidal Galaxy.

A. Magellanic Stream
The Magellanic Stream is a vast, trailing ribbon of gas stretching across the sky, stripped from the Magellanic Clouds as they interact gravitationally with the Milky Way.
B. Sagittarius Dwarf Spheroidal Galaxy
The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
C. Sagittarius Arm
The Sagittarius Arm is one of the main spiral arms of the Milky Way galaxy, rich in star-forming regions and nebulae, located between the galactic center and the outer Perseus Arm.
D. Gould Belt
The Gould Belt is a nearby, partial ring of young stars, gas, and star-forming regions tilted to the Milky Way’s plane and encompassing many of the bright constellations visible from Earth.
E. Milky Way subgroup
The Milky Way subgroup is the collection of nearby galaxies gravitationally bound to and dominated by the Milky Way within the larger Local Group.
F. None of above. chosen

Statements (50)

Predicate	Object
instanceOf	astronomical structure ⓘ stellar stream ⓘ tidal stream ⓘ
ageOfDisruption	several billion years ⓘ
alsoKnownAs	Sagittarius Stream ⓘ surface form: Sagittarius tidal stream Sagittarius Stream ⓘ surface form: Sgr stream
associatedWith	Sagittarius Dwarf Spheroidal Galaxy ⓘ surface form: Sagittarius Dwarf Spheroidal Galaxy core globular cluster Arp 2 ⓘ Messier 54 ⓘ surface form: globular cluster M54 Terzan 7 ⓘ surface form: globular cluster Terzan 7 Terzan 8 ⓘ surface form: globular cluster Terzan 8
composedOf	dark matter ⓘ globular clusters ⓘ stars ⓘ
contains	bifurcated branches ⓘ leading arm ⓘ trailing arm ⓘ
discoveredBy	Gerry Gilmore ⓘ Mike Irwin ⓘ Rodrigo Ibata ⓘ
discoveredUsing	Anglo-Australian Telescope ⓘ UK Schmidt Telescope ⓘ
discoveryYear	1994 ⓘ
distanceFromGalacticCenter	approximately 15–60 kiloparsecs ⓘ
distanceFromSun	approximately 20–60 kiloparsecs ⓘ
encircles	Milky Way ⓘ
extendsOver	both Galactic hemispheres ⓘ more than 360 degrees on the sky ⓘ
hasProgenitor	Sagittarius Dwarf Spheroidal Galaxy ⓘ
hostGalaxy	Milky Way ⓘ
isExampleOf	ongoing minor merger with the Milky Way ⓘ
isResultOf	galactic cannibalism ⓘ tidal disruption ⓘ
kinematics	coherent velocity pattern along orbit ⓘ
locatedIn	Milky Way stellar halo ⓘ surface form: Milky Way halo
mappedBy	Two Micron All Sky Survey ⓘ surface form: 2MASS survey Gaia observatory ⓘ surface form: Gaia mission Sloan Digital Sky Survey ⓘ
observedIn	infrared wavelengths ⓘ near-ultraviolet wavelengths ⓘ optical wavelengths ⓘ
orbitalInclination	nearly polar to Galactic disk ⓘ
orbitalShape	polar orbit ⓘ
originatesFrom	Sagittarius Dwarf Spheroidal Galaxy ⓘ
stellarPopulation	metal-poor stars ⓘ old stars ⓘ
traces	Milky Way gravitational potential ⓘ
usedFor	constraining Milky Way dark matter halo shape ⓘ studying galaxy formation ⓘ testing models of hierarchical merging ⓘ

How these facts were elicited

Referenced by (8)

Full triples — surface form annotated when it differs from this entity's canonical label.

Sagittarius Dwarf Spheroidal Galaxy → forms → Sagittarius Stream ⓘ

SagDEG → hasStellarStream → Sagittarius Stream ⓘ

Sagittarius Stream → alsoKnownAs → Sagittarius Stream ⓘ

this entity surface form: Sagittarius tidal stream

Sagittarius Stream → alsoKnownAs → Sagittarius Stream ⓘ

this entity surface form: Sgr stream

Terzan 7 → orbitalAssociation → Sagittarius Stream ⓘ

this entity surface form: Sagittarius tidal stream

Arp 2 → associatedWith → Sagittarius Stream ⓘ

this entity surface form: Sagittarius stellar stream

Milky Way stellar halo → hasSubstructure → Sagittarius Stream ⓘ

this entity surface form: Sagittarius stream

Terzan 8 → belongsToSystem → Sagittarius Stream ⓘ