This is a list of stellar streams. A stellar stream is an association of stars orbiting a galaxy that was once a globular cluster or dwarf galaxy that has now been torn apart and stretched out along its orbit by tidal forces.
| Name | Origin | Mass (Solar masses) |
Length (light years) |
Composition | Discovery year |
|---|---|---|---|---|---|
| Arcturus stream | Defunct dwarf galaxy | Unknown | Unknown | Old stars deficient in heavy elements | 1971 |
| Magellanic Stream | Large and Small Magellanic Clouds | 200 million | 1 million | Hydrogen gas | 1972 |
| Sagittarius stream | Sagittarius Dwarf Elliptical Galaxy | 100 million | 1 million | Wide variety of stars | 1994 |
| Helmi stream | Defunct dwarf galaxy | 10 to 100 million | Several complete loops around the Milky Way | Old stars deficient in heavy elements | 1999 |
| Palomar 5 stream | Globular cluster Palomar 5 | 5000 | 30,000 | Old stars | 2001 |
| Virgo stream | defunct dwarf galaxy | 30,000 | 2001 | ||
| Monoceros ring | Canis Major dwarf galaxy | 100 million | 200,000 | Intermediate-age stars | 2002 |
| Anticenter stream | Defunct dwarf galaxy | Unknown | 30,000 | Old stars | 2006 |
| NGC 5466 stream 45 Degree Tidal Stream |
Globular cluster NGC 5466 | 10,000 | 60,000 | Very old stars | 2006[2] |
| Orphan stream | Ursa Major II Dwarf galaxy | 100,000 | 20,000 | Old stars | 2006 |
| Globular cluster | 2007[2] | ||||
| Defunct dwarf galaxy | 2007[2] |
| Name | Origin | Mass (Solar masses) |
Length (light years) |
Composition | Discovery year |
|---|---|---|---|---|---|
| M31 Giant stellar stream |
|||||
| Andromeda NE stellar stream[3] |
2004 |
| Name | Origin | Mass (Solar masses) |
Length (light years) |
Composition | Discovery year | |
|---|---|---|---|---|---|---|
| NGC
5128 Young Blue Tidal Stream[4] |
A gas fragment or a dwarf galaxy |
2002 |
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