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All articles tagged with "stellar evolution"

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stellar evolution Articles | Developments Today

An illustration of a green

Astronomers Find a White Dwarf With a Green Glow

Sodium in the white dwarf atmosphere absorbs orange light, producing a green appearance.
Research suggests white dwarfs can appear in colors beyond the usual white or pale blue.
Accreted rocky planetary material can affect a white dwarf’s atmospheric chemistry and observed color.

DE

DT Editorial Team·Oct 16, 2026·via space.com

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This artist's illustration shows a white dwarf and its much larger red dwarf binary companion. Astronomers have four more of these binary stars in the Sun's neighborhood. They're called post-common-envelope binaries, and they're hard to detect because the bright red dwarf hides the white dwarf from telescopes. Image Credit: Mark A. Garlick/University of Warwick

Hidden White Dwarfs Found in the Solar Neighborhood

Astronomers confirmed four white dwarfs within about 65 light-years of Earth.
Each was concealed by a brighter red dwarf companion in a tight binary system.
Researchers detected the systems through spectroscopic wobble measurements using Hubble's STIS instrument.
The binaries could improve models of post-common-envelope stellar evolution.

DE

DT Editorial Team·Jul 21, 2026·via universetoday.com

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Image of the Milky Way with its prominent central bar. Credit - NASA/JPL-Caltech/ESO/R. Hurt

Astronomers Pin Down the Outer Limit of the Milky Way’s Star-Forming Disc

Researchers say the Milky Way’s star-forming disc ends roughly 40,000 light-years from the galactic center.
The conclusion comes from age analysis of more than 100,000 giant stars using several survey datasets.
Older stars beyond that boundary are thought to be migrants pushed outward by spiral arms or the central bar.

DE

DT Editorial Team·Apr 28, 2026·via universetoday.com

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Tons of stars are seen against a dark sky.

Astronomers Find Rare Second-Generation Star From Ancient Universe

Astronomers discovered an extremely rare, iron-deficient second-generation star that formed from a single Population III supernova
The star's chemical fingerprint provides direct evidence of how the universe's first stars seeded heavy elements
Such stars were detected using high-resolution spectroscopy across databases of millions of stellar spectra
The findings help constrain the mass and explosion energetics of the universe's first stellar generation

DE

DT Editorial Team·Mar 19, 2026·4 min read·via space.com

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A purple heart-like shape in space outlined with white lines.

Dying Star Produces Heart-Shaped Outburst That Stuns Astronomers

Astronomers observed a dying star producing a rare heart-shaped outburst as it sheds its outer layers
The heart geometry is likely shaped by a companion star or magnetic field creating bipolar outflows
The structure is cosmically short-lived, lasting only thousands of years before dispersing into space

DE

DT Editorial Team·Feb 14, 2026·2 min read·via space.com

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