Red dwarfs

Simulation of the planet GJ 436 b and the magnetic field linking it to its host star

Strongest evidence yet for a magnetic field on a planet outside the solar system

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An analysis of about 18 years of observations has revealed cyclical changes in the activity of the star GJ 436, which appear at times related to the orbit of the planet GJ 436 b and the star's magnetic cycle. The researchers interpret this as an interaction
Mysterious radio signals are returning from space – and one star system may explain their origin

Mysterious radio signals are returning from space – and one star system may explain their origin

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Astronomers have identified ASKAP J1745 as a binary system in which a white dwarf is accreting material from a companion star. The radio and X-ray bursts it produces throughout its orbit may help solve the mystery of long-period radio transients.
An artist's impression of the exoplanet K2-18b, a world larger than Earth orbiting a red dwarf and being studied in search of possible signs of life or technological signatures.

K2-18b Scanned for Alien Signals – But No Technological Signature Found

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SETI researchers used the VLA and MeerKAT telescope to search for narrow radio signals from the intriguing exoplanet. None survived the noise filters, but the method will be used in future searches
A Dyson sphere is a hypothetical megastructure built by an advanced civilization to capture the vast amounts of energy emitted by a star. Illustration: depositphotos.com

Are the coldest "stars" in the galaxy alien megastructures?

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Astronomers propose a new way to identify alien megastructures: look for extremely cold "stars" that emit mostly infrared light and appear free of dust.
An artist's impression of a large gas giant planet orbiting a small red dwarf star called TOI-5205. Credit: Image by Katherine Cain, courtesy of the Carnegie Institution for Science

Webb Space Telescope Discovers Planet with Unusual Atmosphere

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Analysis of TOI-5205 b finds an atmosphere poor in heavy elements relative to its parent star, a result that challenges accepted models of giant planet formation
The golden zone (habitable zone) in a general solar system. Only Earth is at the center, Mars and Venus at the edges. Illustration: depositphotos.com

Prof. Amri Wendel: The habitable zone of planets is wider than we thought

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In an interview with the Al-Hadayan website, the astrobiologist from the Hebrew University, who recently published two articles, explains that liquid water may also exist outside the classic habitable zone – the golden zone – on the dark side of planets.
Artist's impression of space weather around the dwarf star M TIC 141146667. The torus of ionized gas is shaped by the star's magnetic field and rotation, with two dense, tightly packed clumps on opposite sides of the star. Credit: Illustration by Navid Marvi, Carnegie Science

Natural space weather stations may help understand what makes planets habitable

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Cold plasma torus around young red dwarfs causes periodic dimming – providing a “space weather station” to measure particles and magnetic fields from afar
Artist's impression of the exoplanet GJ 1132 b and its host M dwarf. Credit: Dana Berry, Skyworks Digital, CfA

Webb solves mystery: Earth-like planet GJ 1132b has no atmosphere

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New observations from the James Webb Space Telescope indicate that GJ 1132 b, a rocky planet close to an M-type red dwarf, is unable to maintain an atmosphere—a finding that undermines hopes
A Saturn-sized planet orbiting a tiny red dwarf is rewriting what scientists thought was possible in planetary systems. Credit: Avi Blizovsky, via DALEE

The small star that hosts a giant planet and stretches the laws of astronomy

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Astronomers have discovered TOI-6894b – a Saturn-sized planet orbiting a tiny red dwarf, a discovery that challenges conventional models of planetary system formation.
A fiery star and planet in space with a powerful solar flare in the background of twinkling stars.

Violent eruptions from Proxima Centauri could endanger life on nearby planets

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New research using the ALMA telescope reveals that frequent and extremely intense bursts of radiation from Proxima Centauri could destroy the atmospheres of nearby planets and make them uninhabitable.
A planet with an atmosphere. The image was prepared using DALEE and is not a scientific image

Life beyond the earth? James Webb Space Telescope Probes Crucial Clues About Distant Planets

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New research suggests that rocky planets orbiting red dwarfs may have stable atmospheres suitable for life, with promising evidence from the James Webb Space Telescope
UV radiation from interstellar emissions can erode the atmospheres of planets. Credit: University of Hawaii at Manoa

When Red Dwarfs Attack: High-energy UV radiation from stellar emissions can be life-threatening 

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Groundbreaking research has revealed that red dwarfs can produce stellar emissions that carry much higher levels of ultraviolet (UV) radiation than previously believed, casting doubt on the ability of planets
A planet in the life zone or golden zone - where water can exist in a liquid state. Illustration: depositphotos.com

Golden zones abound: hundreds of millions of planets in the Milky Way could possibly support life

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A new study suggests that a third of the planets orbiting dwarf stars common to the Milky Way could potentially support life. As in the story of Goldilocks and the Three Bears, one plate is too hot, the second is too cold and the third is just right
Kepler-1649c orbits the red dwarf at the center of the system. At the moment the second known planet Kepler-1649b. Image: NASA/Ames Research Center/Daniel Rutter

Prof. Omri Vandel will participate in two projects to find planets suitable for life

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The research focuses on a relatively new topic - the programming of biological life in planets orbiting red dwarfs * To verify the hypothesis, the James Webb Space Telescope, and the Israeli Ultrasat Space Telescope when they are launched, will be directed to the stars
Illustration showing what a view from the ground of planet Kepler-1649c might look like. Image: NASA/Ames Research Center/Daniel Rutter

Earth-sized planet in habitable zone hidden in Kepler data

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The discovered planet (right), next to Proxima Centauri (red), the smaller planet and the dust ring | Illustration: Lorenzo Santinelli

A second planet has been discovered orbiting Proxima Centauri - the closest star to the Sun

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Iconography showing the habitable zone around the planet Teegarden in two conservative and optimistic scenarios, compared to our solar system and other planets discovered in their star's habitable zone. The scale is normalized to the size of our solar system. In practice the planets Teegarden b and Teegarden c are much closer to their sun. Illustration: C. Harman

"The two planets discovered this week orbiting a red dwarf near the Sun are good candidates for the search for life"

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Good potential for living. The Tigarden red dwarf and two planets, next to our solar system Illustration: University of Göttingen

Scientists have discovered evidence of two Earth-like planets orbiting a small sun only 12.5 light-years away.

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The predicted planet with a mass 3.2 times that of Earth orbits the red dwarf known as Barnard's Star. Figure: ESO

Super Earth orbits Barnard's star

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Bands of stars, from the Carnegie Institution video - credit Jonathan Gagné Jacqueline Faherty

Stars also like to fly in flocks

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An artist's illustration of the planet Ross 128b. Credit: ESO/M. Kornmesser

Astronomers have discovered an Earth-sized planet 11 light years away

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The simulation aims to highlight the temperature differences that researchers hypothesize exist between the discovered planets. The inner two are too close and therefore would be too hot for liquid water, the middle three are in the sitting area where liquid water might be possible, while the outer two are too far away, and apparently, if there is water in them, they are frozen. Imaging: NASA/JPL-Caltech.

NASA's discovery of seven terrestrial planets in one system will spur a widespread hunt for similar systems

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Astronomers using the Hubble Space Telescope and a trick of nature have confirmed the existence of a planet orbiting two stars in the OGLE-2007-BLG-349 system, located 8,000 light-years away toward the center of our galaxy. The observations are the first in which a three-body system has been discovered using the micro-cleaning technique

The Hubble Space Telescope discovered a planet orbiting two stars at the same time

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red dwarf From Wikipedia

Extraterrestrial life: similar to us and closer than we thought

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An artist's rendering of a view from the surface of one of the three planets orbiting the cold dwarf star TRAPPIST-1 40 light-years away. CREDIT: ESO/M. KORNMESSER

Three planets with potential for life orbit a cold red dwarf close to the solar system

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Artist's rendering of a red dwarf and a gas giant type planet surrounding it. Photo: DAVID A. AGUILAR (CFA/HARVARD-SMITHSONIAN)

Young red dwarfs may teach us how planets form

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At the time when modern man emerged from the shadows, and the Neanderthals were close to extinction, a double star system passed by the far reaches of the solar system. (Image: Michael Osadciw/University of Rochester)

A star passed through our solar system 70 thousand years ago

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Artist's illustration of the new planet Gleise 832 c and Earth. Figure PHL, University of Puerto Rico, Arecibo

A planet similar to Earth was discovered, in its habitable zone and at a very short distance from the solar system

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An artist's impression of a rocky planet orbiting a red giant. Iorf David Aguilar, Harvard-Smithsonian Center for Astrophysics

We may be surrounded by millions of Earth-like planets, perhaps even in our backyard

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Artist's rendering showing the close proximity of two stars, the two active M4 red dwarfs orbit each other in two and a half hours and continue to spin towards each other. Eventually they will merge into one star. Illustration: J. Pinfield

A double star system that was thought to be impossible has been discovered

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A four-legged robot learned to change its movement style to traverse a forest and jump over obstacles

The habitable zone near red dwarfs is very small, it is better to look for Earth-like planets elsewhere

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