Does a star need to be inside a galaxy?
$begingroup$
Must a star belong to a galaxy, or could it be completely isolated?
In case it can be isolated (not belong to a galaxy), could it have a planet orbiting around it?
planets stars galaxies
edited 2 hours ago
Chris
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asked 4 hours ago
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$begingroup$
Must a star belong to a galaxy, or could it be completely isolated?
In case it can be isolated (not belong to a galaxy), could it have a planet orbiting around it?
planets stars galaxies
edited 2 hours ago
Chris
9,35772942
asked 4 hours ago
coopercooper
1111
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3
$begingroup$
See here: Intergalactic star
$endgroup$
– Thomas Fritsch
4 hours ago
$begingroup$
I imagine many/most stars in the IGM are ones that escaped the host galaxy (likely due to its companion star going supernova, see this Wiki entry).
$endgroup$
– Kyle Kanos
4 hours ago
add a comment |
$begingroup$
Must a star belong to a galaxy, or could it be completely isolated?
In case it can be isolated (not belong to a galaxy), could it have a planet orbiting around it?
planets stars galaxies
edited 2 hours ago
Chris
9,35772942
asked 4 hours ago
coopercooper
1111
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cooper is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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$endgroup$
Must a star belong to a galaxy, or could it be completely isolated?
In case it can be isolated (not belong to a galaxy), could it have a planet orbiting around it?
planets stars galaxies
planets stars galaxies
edited 2 hours ago
Chris
9,35772942
asked 4 hours ago
coopercooper
1111
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edited 2 hours ago
Chris
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asked 4 hours ago
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edited 2 hours ago
Chris
9,35772942
edited 2 hours ago
Chris
9,35772942
edited 2 hours ago
Chris
9,35772942
9,35772942
asked 4 hours ago
coopercooper
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asked 4 hours ago
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asked 4 hours ago
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3
$begingroup$
See here: Intergalactic star
$endgroup$
– Thomas Fritsch
4 hours ago
$begingroup$
I imagine many/most stars in the IGM are ones that escaped the host galaxy (likely due to its companion star going supernova, see this Wiki entry).
$endgroup$
– Kyle Kanos
4 hours ago
add a comment |
3
$begingroup$
See here: Intergalactic star
$endgroup$
– Thomas Fritsch
4 hours ago
$begingroup$
I imagine many/most stars in the IGM are ones that escaped the host galaxy (likely due to its companion star going supernova, see this Wiki entry).
$endgroup$
– Kyle Kanos
4 hours ago
3
3
$begingroup$
See here: Intergalactic star
$endgroup$
– Thomas Fritsch
4 hours ago
$begingroup$
See here: Intergalactic star
$endgroup$
– Thomas Fritsch
4 hours ago
$begingroup$
I imagine many/most stars in the IGM are ones that escaped the host galaxy (likely due to its companion star going supernova, see this Wiki entry).
$endgroup$
– Kyle Kanos
4 hours ago
$begingroup$
I imagine many/most stars in the IGM are ones that escaped the host galaxy (likely due to its companion star going supernova, see this Wiki entry).
$endgroup$
– Kyle Kanos
4 hours ago
add a comment |
3 Answers
3
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$begingroup$
No, stars do not need to be inside a galaxy. It is estimated that about 10% of stars do not belong to a galaxy [1]. While most intergalactic stars formed inside a galaxy and were ejected by gravitational interactions, stars can form outside of galaxies as well [2].
We assume that such stars could have planets, just like stars in a galaxy, although no specific examples have been detected yet.
[1] "Detection of intergalactic red-giant-branch stars in the Virgo cluster", Ferguson et al. Nature 391.6666 (1998): 461.
[2] "Polychromatic view of intergalactic star formation in NGC 5291",
M. Boquien et al. A&A, 467 1 (2007) 93-106.
answered 2 hours ago
ThorondorThorondor
1,183221
$endgroup$
add a comment |
$begingroup$
In broad terms, stars and planets need large amounts of material to collect in a small area to form, and pretty much all of such collections of matter belong to galaxies already (they've had a long time to let gravity bring them together).
answered 3 hours ago
physicsTomphysicsTom
71
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They probably formed in a galaxy, but galactic collisions can pitch a lot of them out
$endgroup$
– zeta-band
2 hours ago
add a comment |
$begingroup$
They probably have to be formed in a galaxy. But they can escape. There are many rogue planets that are found outside of solar systems. NASA has observed many rogue stars as well. This usually happens when galaxies collide and they throw out some of the stars. And yes, the rogue stars can have planets orbiting them
answered 1 hour ago
S.t.r.a.n.g.e.C.h.a.r.mS.t.r.a.n.g.e.C.h.a.r.m
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3 Answers
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3 Answers
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$begingroup$
No, stars do not need to be inside a galaxy. It is estimated that about 10% of stars do not belong to a galaxy [1]. While most intergalactic stars formed inside a galaxy and were ejected by gravitational interactions, stars can form outside of galaxies as well [2].
We assume that such stars could have planets, just like stars in a galaxy, although no specific examples have been detected yet.
[1] "Detection of intergalactic red-giant-branch stars in the Virgo cluster", Ferguson et al. Nature 391.6666 (1998): 461.
[2] "Polychromatic view of intergalactic star formation in NGC 5291",
M. Boquien et al. A&A, 467 1 (2007) 93-106.
answered 2 hours ago
ThorondorThorondor
1,183221
$endgroup$
add a comment |
$begingroup$
No, stars do not need to be inside a galaxy. It is estimated that about 10% of stars do not belong to a galaxy [1]. While most intergalactic stars formed inside a galaxy and were ejected by gravitational interactions, stars can form outside of galaxies as well [2].
We assume that such stars could have planets, just like stars in a galaxy, although no specific examples have been detected yet.
[1] "Detection of intergalactic red-giant-branch stars in the Virgo cluster", Ferguson et al. Nature 391.6666 (1998): 461.
[2] "Polychromatic view of intergalactic star formation in NGC 5291",
M. Boquien et al. A&A, 467 1 (2007) 93-106.
answered 2 hours ago
ThorondorThorondor
1,183221
$endgroup$
add a comment |
$begingroup$
No, stars do not need to be inside a galaxy. It is estimated that about 10% of stars do not belong to a galaxy [1]. While most intergalactic stars formed inside a galaxy and were ejected by gravitational interactions, stars can form outside of galaxies as well [2].
We assume that such stars could have planets, just like stars in a galaxy, although no specific examples have been detected yet.
[1] "Detection of intergalactic red-giant-branch stars in the Virgo cluster", Ferguson et al. Nature 391.6666 (1998): 461.
[2] "Polychromatic view of intergalactic star formation in NGC 5291",
M. Boquien et al. A&A, 467 1 (2007) 93-106.
answered 2 hours ago
ThorondorThorondor
1,183221
$endgroup$
No, stars do not need to be inside a galaxy. It is estimated that about 10% of stars do not belong to a galaxy [1]. While most intergalactic stars formed inside a galaxy and were ejected by gravitational interactions, stars can form outside of galaxies as well [2].
We assume that such stars could have planets, just like stars in a galaxy, although no specific examples have been detected yet.
[1] "Detection of intergalactic red-giant-branch stars in the Virgo cluster", Ferguson et al. Nature 391.6666 (1998): 461.
[2] "Polychromatic view of intergalactic star formation in NGC 5291",
M. Boquien et al. A&A, 467 1 (2007) 93-106.
answered 2 hours ago
ThorondorThorondor
1,183221
edited 2 hours ago
answered 2 hours ago
ThorondorThorondor
1,183221
answered 2 hours ago
ThorondorThorondor
1,183221
answered 2 hours ago
ThorondorThorondor
1,183221
1,183221
add a comment |
add a comment |
$begingroup$
In broad terms, stars and planets need large amounts of material to collect in a small area to form, and pretty much all of such collections of matter belong to galaxies already (they've had a long time to let gravity bring them together).
answered 3 hours ago
physicsTomphysicsTom
71
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$begingroup$
They probably formed in a galaxy, but galactic collisions can pitch a lot of them out
$endgroup$
– zeta-band
2 hours ago
add a comment |
$begingroup$
In broad terms, stars and planets need large amounts of material to collect in a small area to form, and pretty much all of such collections of matter belong to galaxies already (they've had a long time to let gravity bring them together).
answered 3 hours ago
physicsTomphysicsTom
71
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$endgroup$
$begingroup$
They probably formed in a galaxy, but galactic collisions can pitch a lot of them out
$endgroup$
– zeta-band
2 hours ago
add a comment |
$begingroup$
In broad terms, stars and planets need large amounts of material to collect in a small area to form, and pretty much all of such collections of matter belong to galaxies already (they've had a long time to let gravity bring them together).
answered 3 hours ago
physicsTomphysicsTom
71
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physicsTom is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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$endgroup$
In broad terms, stars and planets need large amounts of material to collect in a small area to form, and pretty much all of such collections of matter belong to galaxies already (they've had a long time to let gravity bring them together).
answered 3 hours ago
physicsTomphysicsTom
71
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answered 3 hours ago
physicsTomphysicsTom
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answered 3 hours ago
physicsTomphysicsTom
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answered 3 hours ago
physicsTomphysicsTom
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$begingroup$
They probably formed in a galaxy, but galactic collisions can pitch a lot of them out
$endgroup$
– zeta-band
2 hours ago
add a comment |
$begingroup$
They probably formed in a galaxy, but galactic collisions can pitch a lot of them out
$endgroup$
– zeta-band
2 hours ago
$begingroup$
They probably formed in a galaxy, but galactic collisions can pitch a lot of them out
$endgroup$
– zeta-band
2 hours ago
$begingroup$
They probably formed in a galaxy, but galactic collisions can pitch a lot of them out
$endgroup$
– zeta-band
2 hours ago
add a comment |
$begingroup$
They probably have to be formed in a galaxy. But they can escape. There are many rogue planets that are found outside of solar systems. NASA has observed many rogue stars as well. This usually happens when galaxies collide and they throw out some of the stars. And yes, the rogue stars can have planets orbiting them
answered 1 hour ago
S.t.r.a.n.g.e.C.h.a.r.mS.t.r.a.n.g.e.C.h.a.r.m
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add a comment |
$begingroup$
They probably have to be formed in a galaxy. But they can escape. There are many rogue planets that are found outside of solar systems. NASA has observed many rogue stars as well. This usually happens when galaxies collide and they throw out some of the stars. And yes, the rogue stars can have planets orbiting them
answered 1 hour ago
S.t.r.a.n.g.e.C.h.a.r.mS.t.r.a.n.g.e.C.h.a.r.m
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$endgroup$
add a comment |
$begingroup$
They probably have to be formed in a galaxy. But they can escape. There are many rogue planets that are found outside of solar systems. NASA has observed many rogue stars as well. This usually happens when galaxies collide and they throw out some of the stars. And yes, the rogue stars can have planets orbiting them
answered 1 hour ago
S.t.r.a.n.g.e.C.h.a.r.mS.t.r.a.n.g.e.C.h.a.r.m
566
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$endgroup$
They probably have to be formed in a galaxy. But they can escape. There are many rogue planets that are found outside of solar systems. NASA has observed many rogue stars as well. This usually happens when galaxies collide and they throw out some of the stars. And yes, the rogue stars can have planets orbiting them
answered 1 hour ago
S.t.r.a.n.g.e.C.h.a.r.mS.t.r.a.n.g.e.C.h.a.r.m
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answered 1 hour ago
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answered 1 hour ago
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answered 1 hour ago
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3
$begingroup$
See here: Intergalactic star
$endgroup$
– Thomas Fritsch
4 hours ago
$begingroup$
I imagine many/most stars in the IGM are ones that escaped the host galaxy (likely due to its companion star going supernova, see this Wiki entry).
$endgroup$
– Kyle Kanos
4 hours ago