Brown dwarf

Brown dwarfs are substellar objects not massive enough to sustain hydrogen-1 fusion reactions in their cores, unlike main-sequence stars. They occupy the mass range between the heaviest gas giants and the lightest stars, with an upper limit around 75 to 80 Jupiter masses (MJ). Brown dwarfs heavier than about 13 MJ are thought to fuse deuterium and those above ~65 MJ, fuse lithium as well. Brown dwarfs may be fully convective, with no layers or chemical differentiation by depth.

The defining differences between a very low-mass brown dwarf and a gas giant (~13 MJ) are debated. One school of thought is based on formation; the other, on the physics of the interior. Part of the debate concerns whether "brown dwarfs" must, by definition, have experienced fusion at some point in their history.

Stars are categorized by spectral class, with brown dwarfs being designated as types M, L, T, and Y. Despite their name, brown dwarfs are of different colors. Many brown dwarfs would likely appear magenta to the human eye, or possibly orange/red. Brown dwarfs are not very luminous at visible wavelengths.

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Latest News for: brown dwarf

Two new brown dwarfs discovered with TESS

Phys Dot Org 17 Mar 2025
Although many brown dwarfs have been detected to date, these objects orbiting other stars are a rare find ... Two new brown dwarfs discovered with TESS (2025, March 17) retrieved 17 March 2025 from https.//phys.org/news/2025-03-brown-dwarfs-tess.html.

First-ever: Webb captures direct image of carbon dioxide outside solar system

Interesting Engineering 17 Mar 2025
Colors are applied to filters from Webb’s NIRCam (Near-Infrared Camera) ... This capability allows planetary astronomers to differentiate between giant planets and brown dwarfs, which are star-like objects that lack the mass for nuclear fusion.  ... .

No, Canada! Why we don’t want the Great Woke North as our 51st State

New York Post 14 Mar 2025
Imagine you had a woke lunatic living in your attic ... And the next morning they’d be down with their hand out, expecting breakfast and pocket money ... America’s GDP dwarfs Canada’s — who do you think will pick up the bill if the brown stuff hits the fan?.

Astronomers solve mystery of ‘cosmic Morse code’ signal

The Times/The Sunday Times 12 Mar 2025
Situated about 1,600 light years away, the system consists of a red dwarf — a diminutive, relatively cool star — and a white ... It’s twins! ‘Brown dwarf’ that perplexed scientists is not one, but two.

Webb Looks Right into the Flame Nebula

Universe Today 11 Mar 2025
It’s less than a million years old and is teeming with brown dwarfs, objects that never quite accumulated ...

Webb peers deeper into mysterious Flame Nebula to find 'failed stars'

Phys Dot Org 10 Mar 2025
Within the Flame Nebula, there are objects so small that their cores will never be able to fuse hydrogen like full-fledged stars—brown dwarfs. Brown dwarfs, often called "failed stars," over time become very dim and much cooler than stars.

The Last Dwarfs ($TLD) Presale Enters Stage 2 Amid Surging Demand

Brave New Coin 09 Mar 2025
300K+ Users Join as The Last Dwarfs Gains Momentum. The Last Dwarfs is revolutionizing crypto investing by merging gaming with decentralized finance ... Mark Brown, CEO of The Last Dwarfs, shared his vision for the project, stating.

NASA’s James Webb spots mysterious ‘Super Jupiter’ floating in space

Michigan Live 06 Mar 2025
... and could provide valuable insights into their “three-dimensional complexity.” However, it’s not classified as an exoplanet but could instead be a brown dwarf – something between a planet and a star.

James Webb Spots Mysterious Object Crossing Space Between Stars

Futurism 05 Mar 2025
... is.) Astronomers also aren't ruling out the possibility that it's a brown dwarf, an object that's between a planet and a star ... More on brown dwarfs. Astronomers Discover Brown Dwarf Covered in Stripes .

Mysterious cosmic body is a rogue ‘Super-Jupiter’

Popular Science 05 Mar 2025
Previous examinations using ground-based tools as well as the Hubble and Spitzer space telescopes indicated SIMP 0136 was potentially a brown dwarf—a cosmic body with the makings of a star that ...

The new Vox Machina book finally gives Shaun Gilmore his due — read an excerpt here

Polygon 03 Mar 2025
As Shaun himself emerges from the gloomy dark of the storage cellar, he finds a stout young dwarf with wide, brown eyes lost in contemplation of one of the lamps sitting beside the till.
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