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red giants

Two nearly symmetrical swirling loops of gas and dust mark the dying flickers of an ancient red giant star. Credit: International Gemini Observatory/NOIRLab/NSF/AURA, TA Rector (University of Alaska Anchorage/NSF's NOIRLab), J. Miller (Gemini Observatory/NSF's NOIRLab), M. Rodriguez (Gemini Observatory/NSF's NOIRLab), M. Zamani ( NSF's NOIRLab)

An overflowing cosmic "urn" - telescope captures the spectacular end-of-life display of a red giant

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This end-of-life phase of red giant stars is relatively short, and the celestial structures that form around them are rare, so the Tobi Pitcher Nebula is an excellent example of a case study in the evolution of a star
Betelgeuse dims over time, with an interstellar cloud seen in the last panel. NASA, ESA and E. Wheatley (STScI)

Beetlejuice: The star continues to behave mysteriously - here's what will happen if it explodes

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At the end of 2019, the light of the star dimmed and went from the brightest in the Orion group to the third brightest. Since then it has returned and become even brighter than before
The planetary nebula NGC 3918, a bright cloud of colored gas in the constellation, about 4,900 light-years from Earth as imaged by the Hubble Space Telescope. Photo: NASA/ESA

A celestial eye turns a piercing gaze to the Hubble Space Telescope that photographed it

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Abell 39, object number 39 in the catalog of large nebulae discovered by George Abell in 1966 is of a large nebula discovered by George Abell in 1966, is a fine example of a planetary nebula. This photograph was taken in 1997 from the Kite Peak National Observatory in Arizona through a blue-green filter that isolates the light emitted by the oxygen atoms in the nebula at a wavelength of 500.7 nm. The diameter of the nebula is about five light years, and the thickness of the spherical shell is about a third of a light year. The nebula itself is about 7,000 light-years from Earth in the constellation Hercules. Credit: TARector (NRAO/AUI/NSF and NOAO/AURA/NSF) and BAWolpa (NOAO/AURA/NSF) WIYN

What will happen when our sun dies?

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The contours seen on the surface of the red giant π1 Gruis are heat convection cells, in which hot plasma moves up from the depths of the star, cools, and returns back inside. Despite the blur in the image, she breaks new ground in her ability to observe the star's disk from a distance of 530 light years, and for the first time identify this phenomenon directly on a star other than our sun. Source: ESO.

Astronomers discovered huge "bubbles" on the face of a red giant

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A red giant (and a planet next to it). Illustration: shutterstock

A hybrid star - a neutron star inside a red supergiant

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The coldest place in the universe has been discovered. And what does this have to do with Einstein?

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An image of the red giant Beetlejuice approaching a mysterious dust wall. Photo: European Space Agency's Herschel Telescope

Rare photo: The massive star Beetlejuice is on its way to collide with a wall of cosmic dust

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U Cam - an exploding star in the Giraffe group (not far from the North Star from our perspective on Earth). Photo: Hubble Space Telescope

The last outburst of a dying star was captured by Hubble

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Dr. Avishai Gal-Yam and research student Yair Harkavi. Weizmann Institute

White dwarfs, heavy elements

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Comparison between the sun and a red giant. Illustration: User Aviad, Hebrew Wikipedia

Why some red giant atmospheres have more carbon than oxygen

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A giant star or the water world?

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