>>WASP-121b was discovered back in 2015, and its searing temperatures have been a known feature since then. But this exoplanet is hot even among its class of so-called “Hot Jupiters,” with temperatures in the upper atmosphere reaching a blistering 2,538° C (4,600° F). That’s roughly 10 times hotter than that of any other known planet.

“Heavy metals have been seen in other hot Jupiters before, but only in the lower atmosphere,” says David Sing, lead researcher on the study. “So you don’t know if they are escaping or not. With WASP-121b, we see magnesium and iron gas so far away from the planet that they’re not gravitationally bound.

https://newatlas.com/wasp-121b-exoplanet-hot-heavy-metal/60876/

PermeateFree said:

>>WASP-121b was discovered back in 2015, and its searing temperatures have been a known feature since then. But this exoplanet is hot even among its class of so-called “Hot Jupiters,” with temperatures in the upper atmosphere reaching a blistering 2,538° C (4,600° F). That’s roughly 10 times hotter than that of any other known planet.

“Heavy metals have been seen in other hot Jupiters before, but only in the lower atmosphere,” says David Sing, lead researcher on the study. “So you don’t know if they are escaping or not. With WASP-121b, we see magnesium and iron gas so far away from the planet that they’re not gravitationally bound.

https://newatlas.com/wasp-121b-exoplanet-hot-heavy-metal/60876/

> with temperatures in the upper atmosphere reaching a blistering 2,538° C

Hold it, that means it’s not a planet at all.

Y class (brown dwarfs and planets) go down to temperatures of order 50 degrees Celcius.
T class brown dwarfs go down to temperatures of order 300 degrees.
Brown dwarfs don’t go hotter than 1,900 degrees.

This is a bloody star.

mollwollfumble said:

PermeateFree said:

>>WASP-121b was discovered back in 2015, and its searing temperatures have been a known feature since then. But this exoplanet is hot even among its class of so-called “Hot Jupiters,” with temperatures in the upper atmosphere reaching a blistering 2,538° C (4,600° F). That’s roughly 10 times hotter than that of any other known planet.

“Heavy metals have been seen in other hot Jupiters before, but only in the lower atmosphere,” says David Sing, lead researcher on the study. “So you don’t know if they are escaping or not. With WASP-121b, we see magnesium and iron gas so far away from the planet that they’re not gravitationally bound.

https://newatlas.com/wasp-121b-exoplanet-hot-heavy-metal/60876/

> with temperatures in the upper atmosphere reaching a blistering 2,538° C

Hold it, that means it’s not a planet at all.

Y class (brown dwarfs and planets) go down to temperatures of order 50 degrees Celcius.
T class brown dwarfs go down to temperatures of order 300 degrees.
Brown dwarfs don’t go hotter than 1,900 degrees.

This is a bloody star.

>>Between exoplanets with ruby clouds and those that are actually just giant diamonds, science fiction has barely prepared us for just how weird alien worlds could be. Now, thanks to new Hubble observations we have another contender in WASP-121b, a planet that’s so intensely hot it’s vaporizing heavy metals and venting them into space. As if that wasn’t enough, the poor planet is also being stretched into an egg shape thanks to the strong gravity of its host star.<<

You might have to argue with NASA.

PermeateFree said:

mollwollfumble said:

PermeateFree said:

>>WASP-121b was discovered back in 2015, and its searing temperatures have been a known feature since then. But this exoplanet is hot even among its class of so-called “Hot Jupiters,” with temperatures in the upper atmosphere reaching a blistering 2,538° C (4,600° F). That’s roughly 10 times hotter than that of any other known planet.

“Heavy metals have been seen in other hot Jupiters before, but only in the lower atmosphere,” says David Sing, lead researcher on the study. “So you don’t know if they are escaping or not. With WASP-121b, we see magnesium and iron gas so far away from the planet that they’re not gravitationally bound.

https://newatlas.com/wasp-121b-exoplanet-hot-heavy-metal/60876/

> with temperatures in the upper atmosphere reaching a blistering 2,538° C

Hold it, that means it’s not a planet at all.

Y class (brown dwarfs and planets) go down to temperatures of order 50 degrees Celcius.
T class brown dwarfs go down to temperatures of order 300 degrees.
Brown dwarfs don’t go hotter than 1,900 degrees.

This is a bloody star.

>>Between exoplanets with ruby clouds and those that are actually just giant diamonds, science fiction has barely prepared us for just how weird alien worlds could be. Now, thanks to new Hubble observations we have another contender in WASP-121b, a planet that’s so intensely hot it’s vaporizing heavy metals and venting them into space. As if that wasn’t enough, the poor planet is also being stretched into an egg shape thanks to the strong gravity of its host star.<<

You might have to argue with NASA.

i wonder if there is a difference between heat produced chemically and heat produced by nuclear reaction? and i wonder whether this difference is what makes a star different to a hot planet.

JudgeMental said:

PermeateFree said:

mollwollfumble said:

> with temperatures in the upper atmosphere reaching a blistering 2,538° C

Hold it, that means it’s not a planet at all.

Y class (brown dwarfs and planets) go down to temperatures of order 50 degrees Celcius.
T class brown dwarfs go down to temperatures of order 300 degrees.
Brown dwarfs don’t go hotter than 1,900 degrees.

This is a bloody star.

>>Between exoplanets with ruby clouds and those that are actually just giant diamonds, science fiction has barely prepared us for just how weird alien worlds could be. Now, thanks to new Hubble observations we have another contender in WASP-121b, a planet that’s so intensely hot it’s vaporizing heavy metals and venting them into space. As if that wasn’t enough, the poor planet is also being stretched into an egg shape thanks to the strong gravity of its host star.<<

You might have to argue with NASA.

i wonder if there is a difference between heat produced chemically and heat produced by nuclear reaction? and i wonder whether this difference is what makes a star different to a hot planet.

The cut-off point between planets and brown dwarfs is normally 13 Jupiter masses, according to Wiki:

https://en.wikipedia.org/wiki/Brown_dwarf

…but apparently NASA doesn’t follow that convention in their classification of exoplanets.

Bubblecar said:

JudgeMental said:

PermeateFree said:

>>Between exoplanets with ruby clouds and those that are actually just giant diamonds, science fiction has barely prepared us for just how weird alien worlds could be. Now, thanks to new Hubble observations we have another contender in WASP-121b, a planet that’s so intensely hot it’s vaporizing heavy metals and venting them into space. As if that wasn’t enough, the poor planet is also being stretched into an egg shape thanks to the strong gravity of its host star.<<

You might have to argue with NASA.

i wonder if there is a difference between heat produced chemically and heat produced by nuclear reaction? and i wonder whether this difference is what makes a star different to a hot planet.

The cut-off point between planets and brown dwarfs is normally 13 Jupiter masses, according to Wiki:

https://en.wikipedia.org/wiki/Brown_dwarf

…but apparently NASA doesn’t follow that convention in their classification of exoplanets.

Whole new world out there.