Why didn’t this thing ignite into a star?
Maybe it was a star. After all, we really have no idea how planets form. Just guesses.
It might still be growing, it may ignite yet.
>> Why didn’t this thing ignite into a star?
How do you know it didn’t?
“Why didn’t this thing ignite into a star?”
Insufficient mass. It may ultimately fall into the category of a brown dwarf star versus a super-Jovian class planet.
If it had there would have been a binary star with no particular interest to anyone..
Not big enough to be star in nature need a critical gravitational mass to compress the nucleus..
It was the realization by the physicists around 1940 that this critical mass could be artificially created with enriched Uranium that lead to Hiroshima and winning the war..
“Why didn’t this thing ignite into a star?”
It did, we are just looking at a red dwarf inside a Dyson sphere.
Freegards
According to http://hypertextbook.com/facts/2001/KellyMaurelus.shtml, the mass needed to ignite as a star is around 0.05 - 0.10 solar masses. Jupiter is about 0.001 solar masses, so even that huge planet would only be 0.011 solar masses.
Exactly, I had heard that if Jupiter was 10 times bigger, it would turn into a star. And this one goes to 11, which is one louder....
No kindling?
It’s not massive enough to ignite. 65 Jupiter masses is the threshold. This is barely enough to be a brown dwarf. It’s even below the 13 Jupiter mass threshold to burn deuterium.
Someone wisely posted “No Smoking” signs.
Sooner or later, though, someone will try to fry a turkey and that will be all she wrote.