Brown dwarfs cool and darken steadily over their lifetimes: sufficiently old brown dwarfs will be too faint to be detectable.

Leik omfg

At astronomical distances, sure.

There are GALAXIES that are undetectable for very good observational reasons. But I bet you'd notice one if it was nearby.

A brown dwarf inside the orbit of Neptune would be a naked-eye object. Plain and simple. This is pure surface reflectivity -- nothing to do with inner heat.

everybody on this forum must have seen already some videos and pictures

of the secdon sun which was at the right side of the sun, the last videio

I saw about was from the lake Balaton in Hungary. The obejct is def. there.

And almost all of us have seen it in the videos. Why does everybody still

search for it and think that it is not there??? It is there and it is a brown dwarf

and because it is getting closer to the sun there are more erruptions there...


thanks for this informations OP!!