I’m pretty sure that this discovery has not reached the popular press.

Distance from us 10 Pasecs. – nearby
Average surface temperature 325 Kelvin. – pleasantly warm
Orbital distance from primary 1.0 au. – same as Earth

Discovered by James Webb telescope.

Just recently reported in ArXiv.

https://arxiv.org/pdf/2303.16923.pdf

I’d say it was worth a visit.

The ArXiv article downplays this discovery. The new planet is orbiting a brown dwarf primary. It is heated from within rather than from radiation from the primary. It is more masive than Jupiter, being somewhere in the range of 4.5 to 12 Jupiter masses.

mollwollfumble said:

I’m pretty sure that this discovery has not reached the popular press.

Distance from us 10 Pasecs. – nearby
Average surface temperature 325 Kelvin. – pleasantly warm
Orbital distance from primary 1.0 au. – same as Earth

Discovered by James Webb telescope.

Just recently reported in ArXiv.

https://arxiv.org/pdf/2303.16923.pdf

I’d say it was worth a visit.

The ArXiv article downplays this discovery. The new planet is orbiting a brown dwarf primary. It is heated from within rather than from radiation from the primary. It is more masive than Jupiter, being somewhere in the range of 4.5 to 12 Jupiter masses.

cool

mollwollfumble said:

I’m pretty sure that this discovery has not reached the popular press.

Distance from us 10 Pasecs. – nearby
Average surface temperature 325 Kelvin. – pleasantly warm
Orbital distance from primary 1.0 au. – same as Earth

Discovered by James Webb telescope.

Just recently reported in ArXiv.

https://arxiv.org/pdf/2303.16923.pdf

I’d say it was worth a visit.

The ArXiv article downplays this discovery. The new planet is orbiting a brown dwarf primary. It is heated from within rather than from radiation from the primary. It is more masive than Jupiter, being somewhere in the range of 4.5 to 12 Jupiter masses.

Have the tickets gone on sale yet? /-;{

This article is also related. Not about same object, a different one.

https://arxiv.org/pdf/2306.11807.pdf

This one has a hotter temperature, 450 Kelvin, uncomfortably hot. But we need a temperature that high to get an accurate spectrum.

The First JWST Spectral Energy Distribution of a Y dwarf.

There’s not much infrared emission light left after absorption by all those molecules. Ammonia, water, methane, carbon dioxide, carbon monoxide. Think of this as the type of emission spectrum that you might see from Jupiter.

mollwollfumble said:

This article is also related. Not about same object, a different one.

https://arxiv.org/pdf/2306.11807.pdf

This one has a hotter temperature, 450 Kelvin, uncomfortably hot. But we need a temperature that high to get an accurate spectrum.

The First JWST Spectral Energy Distribution of a Y dwarf.

There’s not much infrared emission light left after absorption by all those molecules. Ammonia, water, methane, carbon dioxide, carbon monoxide. Think of this as the type of emission spectrum that you might see from Jupiter.

“450 Kelvin, uncomfortably hot”

A bit of an understatement perhaps.

For anything needing liquid water to survive anyway.

mollwollfumble said:

This article is also related. Not about same object, a different one.

https://arxiv.org/pdf/2306.11807.pdf

This one has a hotter temperature, 450 Kelvin, uncomfortably hot. But we need a temperature that high to get an accurate spectrum.

The First JWST Spectral Energy Distribution of a Y dwarf.

There’s not much infrared emission light left after absorption by all those molecules. Ammonia, water, methane, carbon dioxide, carbon monoxide. Think of this as the type of emission spectrum that you might see from Jupiter.

Looking further. There are 525 brown dwarfs known within 20 parsecs of the Sun. Yike. That’s a lot.

A historical blow by blow account of how these were discovered and studied can be found in https://arxiv.org/pdf/2011.11616.pdf

Whew, this is a long paper, I’m up to page 75 and still not at the end.

Brown dwarfs come in three flavours, L, T and Y. Amusingly, there’s a community science project called “backyard worlds” which finds more of these. An appropriate name for finding these nearby cool objects.

The Y dwarfs are of interest to me, because there’s very little difference between a Y dwarf and a free planet.

mollwollfumble said:

Looking further. There are 525 brown dwarfs known within 20 parsecs of the Sun. Yike. That’s a lot.

A historical blow by blow account of how these were discovered and studied can be found in https://arxiv.org/pdf/2011.11616.pdf

Whew, this is a long paper, I’m up to page 75 and still not at the end.

Brown dwarfs come in three flavours, L, T and Y. Amusingly, there’s a community science project called “backyard worlds” which finds more of these. An appropriate name for finding these nearby cool objects.

The Y dwarfs are of interest to me, because there’s very little difference between a Y dwarf and a free planet.

The temperature of Earth, is that of a typical Y2 brown dwarf.

Only one brown dwarf (apart from the new planet in the OP) of those found by infrared astronomy has a surface temperature below 365 Kelvin.

The cooler the temperature of an object is (linear temperature scale) the more of them there are in nearby space.

68 nearby brown dwarfs are known with a temperature below 600 Kelvin.

They are using a low mass cut off of 5 Jupiter masses, to distinguish between brown dwarfs heated by internal radiation and planets heated by absorption of light from a parent star. Fair enough.

But the gravity would be crushing?