Stellar wind

A stellar wind is a flow of gas ejected from the upper atmosphere of a star. It is distinguished from the bipolar outflows characteristic of young stars by being less collimated, although stellar winds are not generally spherically symmetric.

Different types of stars have different types of stellar winds.

Post-main-sequence stars nearing the ends of their lives often eject large quantities of mass in massive ( \scriptstyle \dot{M} > 10^{-3} solar masses per year), slow (v = 10 km/s) winds. These include red giants and supergiants, and asymptotic giant branch stars. These winds are understood to be driven by radiation pressure on dust condensing in the upper atmosphere of the stars.

Massive stars of types O and B have stellar winds with lower mass loss rates (\scriptstyle \dot{M} < 10^{-6} solar masses per year) but very high velocities (v > 1–2000 km/s). Such winds are driven by radiation pressure on the resonance absorption lines of heavy elements such as carbon and nitrogen. These high-energy stellar winds blow stellar wind bubbles.

Latest News for: Stellar wind

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Turbine makers cutting bigger market slices

China Daily 19 Mar 2025
Chinese wind turbine ... China's renewable energy sector experienced a stellar year in 2024, with total installed capacity of wind and solar power surpassing 1.4 billion kilowatts, further reinforcing the country's role as the global leader in renewable energy development....
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A TV Series With A Perfect 100% Rotten Tomatoes Score Is Back For Its Third Season (And Already Renewed For More)

Cinema Blend 18 Mar 2025
However, one show, Dark Winds, has that A+ score for all three seasons. Now, with Season 3 airing on the 2025 TV schedule, it's continuing that stellar streak ... Martin and Robert Redford (both made a brief cameo in Dark Winds Season 3) ... All Three Seasons Of Dark Winds Have 100% On Rotten Tomatoes....
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NASA Launches Mission Aboard Falcon 9 From Vandenberg to Study Sun, Universe’s Beginning

Space Coast Daily 12 Mar 2025
It’s full of turbulent solar wind that washes over Earth,” said Craig DeForest, the mission’s principal investigator at the Southwest Research Institute. “The PUNCH mission is designed to answer basic questions about how stars like our Sun produce stellar winds, and how they give rise to dangerous space weather events right here on Earth.”....
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UAE: Stunning image of Witch Head Nebula captured in Abu Dhabi

Khaleejtimes 07 Mar 2025
The nebula’s iconic blue hue comes from the light of Rigel, whose intense radiation and stellar winds interact with the surrounding gas and dust, creating a distinctive glow ... witch with a long, pointed nose, is the result of these powerful stellar forces sculpting the gas clouds....
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District dynamos: 12 PSD lacrosse, boys volleyball Stars to watch this spring season

Coloradoan 06 Mar 2025
It's a busy spring for Poudre School District athletics ... It won't change the high quality of play ... He'll be the focal point for a Stars club with talent across the roster.Kate Wind, PSD girls lacrosse ... Wind really does it all for PSD. Beyond her scoring, the Towson commit is stellar at winning draws and hoarding possessions for PSD on ground balls....
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A new study reveals the structure of violent winds 1,300 light years away

Phys Dot Org 01 Mar 2025
This huge temperature contrast is the source of violent winds, blowing several kilometers per second, which try to redistribute the energy from day to night ... This stellar wind, combined with the rotation of the planet, probably carries the material asymmetrically, with a preferential direction given by the rotation of the planet....

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