Stars rotating around planets

[Cooky]

well, anyway. As others have stated, stars are massively larger than planets.

I know.. What I didn't know was what restricted planets from being massively large as well. Now I know -they become suns at a certain size.

 

[Cooky]

...So I wonder how that works... Gravity becomes immensely strong as mass builds. And then... Nuclear fission begins at the core and instantly radiates out in all directions, and like an atomic bomb, a star is born?

...That would be pretty cool to watch from a telescope.

 

[Polymath257]

...So I wonder how that works... Gravity becomes immensely strong as mass builds. And then... Nuclear fission begins at the core and instantly radiates out in all directions, and like an atomic bomb, a star is born?

...That would be pretty cool to watch from a telescope.

It's actually a process that takes around a million years. But that is the basic idea.

 

[Polymath257]

Could micro-stars exist?

Depends on what you mean by 'micro'. If you mean *size*, then yes. A neutron star the same mass as our sun would be around 20 miles across. That counts as 'micro' for cosmic phenomena. And, of course, black holes are even smaller in size than neutron stars.

On the other hand, if you mean 'micro' as in 'low mass', then no. Something of low mass would disperse if it got to a temperature of a star.

 

[Bob the Unbeliever]

...So I wonder how that works... Gravity becomes immensely strong as mass builds. And then... Nuclear fission begins at the core and instantly radiates out in all directions, and like an atomic bomb, a star is born?

...That would be pretty cool to watch from a telescope.

Imagine being there (in the system), when the first flush of atomic powered light burst through the crust of the newly forming star?

"Cue the Sun, please"
"Okay. This may take a few million years."
"Cue fast-forward in time, please."
"Check. Firing up the TARDIS. Here we go-- in about 5 minutes or so, relative time, it ought to ... "
"There it is. Amazing."
"yes...yes it is, isn't it?"

 

[shunyadragon]

Why don't we see any stars rotating around or orbiting planets?

. . . because stars do not revolve around planets.

 

[shunyadragon]

and rogue planets don't orbit
they just wander by

Yes, there are rogue planets observed, but stars do not orbit around rogue planets. Rogue planets orbit around galactic centers. They do not just wander by.

 

[Thief]

You know that would lead to another interesting speculation. Would intense mass always result in fusion?

It got me thinking if black holes could actually be regarded as a star or planet?

Like this unusual beast that goes against conventional thought.

Stars can turn into black holes without a supernova

as light cannot escape the gravity well.....black holes are not stars

the photo offered earlier in this thread shows a 'black hole'
and it could well be that item
but the corona shown is then a puzzle

 

[Thief]

...So I wonder how that works... Gravity becomes immensely strong as mass builds. And then... Nuclear fission begins at the core and instantly radiates out in all directions, and like an atomic bomb, a star is born?

...That would be pretty cool to watch from a telescope.

fission and fusion are like …..opposites

 

[Thief]

Yes, there are rogue planets observed, but stars do not orbit around rogue planets. Rogue planets orbit around galactic centers. They do not just wander by.

uhhhh…...yes they do

a planet has mass sufficient......the construction will form a sphere

if that item does not orbit a star.....it has gone rogue

 

[shunyadragon]

uhhhh…...yes they do.

No they do not. Please cite a scientific reference that confirms. Stars are many many times the mass of any planets including rogue planets, which orbit around galactic centers. This is basic Newtonian physics more massive bodies do not orbit around less massive bodies of this extreme mass difference.

a planet has mass sufficient......the construction will form a sphere

Yes, so what?!?!!? Planets do not have sufficient mass for stars to orbit planets.

if that item does not orbit a star.....it has gone rogue

Rogue planets orbit around galactic centers

 

[Bob the Unbeliever]

fission and fusion are like …..opposites

Yet they share so much that is the same.... essentially the same thing: a strong nuclear force is released by the actions of atomic nuclei. In the latter case, nuclei are breaking up (which is hard to do) whereas in the former they are getting together (which is even harder to do). (sorry about the pop-culture references, I just couldn't resist.

<cue music>

 

[Thief]

No they do not. Please cite a scientific reference that confirms.

rogue planets are called rogue......because they orbit.....nothing

hence the term.....rogue

 

[shunyadragon]

rogue planets are called rogue......because they orbit.....nothing

hence the term.....rogue

Not true, the rogue planets are called rogue, because they do not orbit a star. They orbit the center of a galaxy. Get your science straight, Again it is impossible for a star to orbit a planet.

From: Rogue planet - Wikipedia
"A rogue planet is a planetary-mass object that orbits a galactic center directly. Such objects have been ejected from the planetary system in which they formed or have never been gravitationally bound to any star or brown dwarf. The Milky Way alone may have billions of rogue planets."

 

[Thief]

Yet they share so much that is the same.... essentially the same thing: a strong nuclear force is released by the actions of atomic nuclei. In the latter case, nuclei are breaking up (which is hard to do) whereas in the former they are getting together (which is even harder to do). (sorry about the pop-culture references, I just couldn't resist.

<cue music>

nope.....fission is what an Abomb does

the atoms are split

fusion crushes the hydrogen to another hydrogen nuclei
the stripped electrons move to the surface of the sphere really really fast

the hydrogen becomes deuterium
that becomes tritium
that becomes helium
and so on

eventually, if the mass was great enough in the first place....
iron is formed
the last element the star can make and remain stable

after that......if the fusion continues.....
the star will shudder and collapse
the sudden scrunch will produce heavy atoms
and the star will 'pop'

much of what we are here on this planet was formed
looooooong before the solar system gelled

we are star dust

 

[Polymath257]

rogue planets are called rogue......because they orbit.....nothing

hence the term.....rogue

Well, just like the stars, they still orbit the center of the galaxy. We don't know of any rogue planets that aren't bound to a galaxy.

 

[Thief]

Not true, the rogue planets are called rogue, because they do not orbit a star. They orbit the center of a galaxy. Get your science straight, Again it is impossible for a star to orbit a planet.

From: Rogue planet - Wikipedia
"A rogue planet is a planetary-mass object that orbits a galactic center directly. Such objects have been ejected from the planetary system in which they formed or have never been gravitationally bound to any star or brown dwarf. The Milky Way alone may have billions of rogue planets."

if it makes you happy to say so...fine

but an item the size of a planet is a planet when it orbits a star
otherwise …….it's a rogue

 

[Thief]

Well, just like the stars, they still orbit the center of the galaxy. We don't know of any rogue planets that aren't bound to a galaxy.

so you think there are no rogue planets between galaxies?

that too.....would be a rogue

 

[shunyadragon]

so you think there are no rogue planets between galaxies?

There is no evidence for this. Rogue planets orbit the center of the galaxy, as referenced, which contains a super massive Black Hole..

 

[ecco]

There is no evidence for this. Rogue planets orbit the center of the galaxy, as referenced, which contains a super massive Black Hole..

Just to clarify, what exactly do you mean by orbiting the center of the galaxy? Do you mean that in the same sense that earth orbits the center of the galaxy?

Do you agree that a planet ejected from an orbit around Alpha Centauri A and heading in our direction would be called a rouge?