Nemesis is a hypothetical red dwarf [1] or brown dwarf, [2] originally postulated in 1984 [3] to be orbiting the Sun at a distance of about 95,000 AU (1.5 light-years), [2] somewhat beyond the …

Outline of the different ways in which stars of different masses die, and a fairly complete discussion of how brown dwarfs form

Stars can be cold if they are brown dwarfs, objects much bigger than Jupiter but not big enough to ignite nuclear fusion at their core, or black dwarfs, collapsed medium-sized stars (white …

Mar 14, 2021 · The brown dwarfs outer layer will eventually solidify. Much longer than billions of years. Deeper down should become metallic hydrogen. Phase transitions usually generate …

These luke-warm failed stars are called brown dwarfs. If the star is just massive enough to ignite nuclear fusion in its core, but not much more, what happens when it uses up its hydrogen? It …

Aug 8, 2017 · At least one brown dwarf has survived being engulfed by a red giant. Designated WD 0137-349 B, this little brown dwarf located about 300 light years away is known to have …

Nov 29, 1995 · Astronomers have made the first unambiguous detection of an elusive type of object known as a brown dwarf. The evidence consists of observations from 60-inch and 200 …

Feb 4, 2021 · White dwarfs, brown dwarfs, and neutron stars are expected to eventually die through a process known as proton decay, when the subatomic particles they are made of …

How do brown dwarfs relate to lower mass planets and to higher mass stars? Suppose we could do this experiment: start with a planet with the mass of Jupiter, and steadily add gas with the …

Aug 3, 2006 · Now scientists have discovered an unusual binary star system consisting of a brown dwarf (a pseudostar 55 times the size of Jupiter but still too small to reliably fuse …

Sep 2, 2021 · Scientists have identified a venerable brown dwarf nicknamed 'The Accident' that is almost as old as the universe itself careening through our galactic neighborhood at half a …

Mar 11, 2010 · Nicknamed "Nemesis" or "The Death Star," this undetected object could be a red or brown dwarf star, or an even darker presence several times the mass of Jupiter.

Dec 14, 2023 · It's a brown dwarf just hanging out in space, all by its lonesome – and, with a mass of just 3 to 4 times that of Jupiter, it appears to be the lowest-mass object of its kind …

It sets the lowest observational limit on steady X-ray power produced by a brown dwarf star, and shows that million degree Celsius upper atmospheres, or coronas, cease to exist as the …

Jul 25, 2024 · Citizen scientists have discovered what may be a brown dwarf racing through the cosmos at around 1.2 million miles per hour. What launched it?