4 ms·

Could a star be small enough to exist within a massive planet’s atmosphere of some substance? Could a star exist within a planet’s core?

belter 3y ago
The smallest known Star is Jupiter sized. - https://en.wikipedia.org/wiki/OGLE-TR-122 https://en.wikipedia.org/wiki/OGLE-TR-122
- bozhark 3y ago
  Could Jupiter be a failed Binary Star?
  - az09mugen 3y ago
    It does not make really sense to talk about 'binary star'. It should be a 'binary stellar system' with 2 stars involved. With this meaning, if you intend to say Jupiter is a failed star and if it had been a star we will be living in a binary stellar system (Jupiter as a star + the Sun), then yes.
    - euroderf 3y ago
      Two sources of sunlight, often on opposite sides of the Earth, certainly would have changed the path of evolution, possibly even back as far as primordial slime.
      - az09mugen 3y ago
        Definitively ! I wonder how the 'circadian' cycle looks like on this kind of planet and how it impacts the life.
  - layer8 3y ago
    I’d rather say it’s a successful planet.
  - butlike 3y ago
    What if looking backwards in the solarsystem is looking at the same planet, just in the past? Mercury, venus, earth, mars, saturn, uranus, neptune... all the same planet. Neptune, gasses condense as they get compressed by gravity Uranus, a small core surrounded by compressing gas Saturn, we can see the accretion disk formed before it gets compressed to more mass (heard we just found hydrogen cyonide here as well!) Mars, a dense planet with no atmosphere. Water under the crust, though! Earth, hydrogen chloride + h2o = BAM! Life Venus, too close to the sun to sustain life Mercury, a hot planetary body which is smaller due to it's matter being absorbed by the Sun
at_a_remove 3y ago
Short answer: No. Longer answer: Let's assume you have a "star" (more later) and teleport it into the middle of a Jupiter-like object or other such planet. Jupiter isn't a stars and generally once you get to about thirteen Jupiter masses, fusion begins (for a gas giant) and now it is a star. So, let's go over our stars: 1) Red dwarf: This is the largest "star" object that might fit inside of Jupiter. Some are only 70,000 kilometers in diameter and so could fit inside of Jupiter. Upon teleportation, equilibrium is disturbed and the surface of the red dwarf, pulling upon the gases at hundreds of gs, simply absorbs the gas giant with some alacrity. Likely some stellar brightening, changes in color, for a while. 2) White dwarf: Smaller than a red dwarf, their diameters are only a few thousand kilometers, give or take. You get the same results as a red dwarf but, if the gas giant absorbed has enough matter or the white dwarf is already on the edge, you might get a nova. Not a supernova, that's a different system and a different process. Just a nova. 3) Neutron star: Much smaller than your white dwarf and it will have a larger mass. Again you get a collapse of the gas giant but likely no nova since the gas hits the surface and its electron degeneracy pressure is overcome, blah blah, and everything turns into just another layer of neutrons. 4) Black hole: Not really a star any longer, but some older classifications included it and I will add it for completeness' sake. Much like #3, but instead of neutrons the black hole simply increases in size. You may or may not get an accretion disc, depending on the rotations of your gas giant and your black hole. So, in all four cases, none of the stars could exist within the gas giant where the gas giant would remain stable.
- bozhark 3y ago
  Thank you for this response

belter 3y ago

The smallest known Star is Jupiter sized. - https://en.wikipedia.org/wiki/OGLE-TR-122 https://en.wikipedia.org/wiki/OGLE-TR-122

bozhark 3y ago
Could Jupiter be a failed Binary Star?
- az09mugen 3y ago
  It does not make really sense to talk about 'binary star'. It should be a 'binary stellar system' with 2 stars involved. With this meaning, if you intend to say Jupiter is a failed star and if it had been a star we will be living in a binary stellar system (Jupiter as a star + the Sun), then yes.
  - euroderf 3y ago
    Two sources of sunlight, often on opposite sides of the Earth, certainly would have changed the path of evolution, possibly even back as far as primordial slime.
    - az09mugen 3y ago
      Definitively ! I wonder how the 'circadian' cycle looks like on this kind of planet and how it impacts the life.
- layer8 3y ago
  I’d rather say it’s a successful planet.
- butlike 3y ago
  What if looking backwards in the solarsystem is looking at the same planet, just in the past? Mercury, venus, earth, mars, saturn, uranus, neptune... all the same planet. Neptune, gasses condense as they get compressed by gravity Uranus, a small core surrounded by compressing gas Saturn, we can see the accretion disk formed before it gets compressed to more mass (heard we just found hydrogen cyonide here as well!) Mars, a dense planet with no atmosphere. Water under the crust, though! Earth, hydrogen chloride + h2o = BAM! Life Venus, too close to the sun to sustain life Mercury, a hot planetary body which is smaller due to it's matter being absorbed by the Sun

at_a_remove 3y ago

Short answer: No. Longer answer: Let's assume you have a "star" (more later) and teleport it into the middle of a Jupiter-like object or other such planet. Jupiter isn't a stars and generally once you get to about thirteen Jupiter masses, fusion begins (for a gas giant) and now it is a star. So, let's go over our stars: 1) Red dwarf: This is the largest "star" object that might fit inside of Jupiter. Some are only 70,000 kilometers in diameter and so could fit inside of Jupiter. Upon teleportation, equilibrium is disturbed and the surface of the red dwarf, pulling upon the gases at hundreds of gs, simply absorbs the gas giant with some alacrity. Likely some stellar brightening, changes in color, for a while. 2) White dwarf: Smaller than a red dwarf, their diameters are only a few thousand kilometers, give or take. You get the same results as a red dwarf but, if the gas giant absorbed has enough matter or the white dwarf is already on the edge, you might get a nova. Not a supernova, that's a different system and a different process. Just a nova. 3) Neutron star: Much smaller than your white dwarf and it will have a larger mass. Again you get a collapse of the gas giant but likely no nova since the gas hits the surface and its electron degeneracy pressure is overcome, blah blah, and everything turns into just another layer of neutrons. 4) Black hole: Not really a star any longer, but some older classifications included it and I will add it for completeness' sake. Much like #3, but instead of neutrons the black hole simply increases in size. You may or may not get an accretion disc, depending on the rotations of your gas giant and your black hole. So, in all four cases, none of the stars could exist within the gas giant where the gas giant would remain stable.

bozhark 3y ago
Thank you for this response