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    JWST tagged posts

    Eccentric Exoplanet discovered

    January 8, 2022, Categories  Astronomy/Space

    TESS target pixel files of Sectors 14, 20, 21, and 26 that observed TOI-2257, generated by means of tpfplotter (Aller et al. 2020). The apertures used to extract the photometry by the SPOC pipeline are shown as red shaded regions. The Gaia DR2 catalog (Gaia Collaboration 2018) is over-plotted, with all sources of up to 6 magnitudes in contrast with TOI-2257 shown as red circles. We note that the symbol size scales with the magnitude contrast. While the star is relatively isolated, there is a small amount of contamination from outside sources, ranging from 2–5% of the total flux. Credit: DOI: 10.1051/0004-6361/202142280

    Eccentric exoplanet discovered Led by the University of Bern, an international research team has discovered a sub-Neptune exoplanet orbiting a red dwarf star...

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    Ocean World: Rocky Exoplanet has just Half the Mass of Venus

    August 7, 2021, Categories  Astronomy/Space

    A team of astronomers have used the European Southern Observatory’s Very Large Telescope (ESO’s VLT) in Chile to shed new light on planets around a nearby star, L98-59, that resemble those in the inner Solar System. Amongst the findings are a planet with half the mass of Venus — the lightest exoplanet ever to be measured using the radial velocity technique — an ocean world, and a possible planet in the habitable zone.

    “The planet in the habitable zone may have an atmosphere that could protect and support life,” says María Rosa Zapatero Osorio, an astronomer at the Centre for Astrobiology in Madrid, Spain, and one of the authors of the study published today in Astronomy & Astrophysics.

    The results are an important step in the quest to find life on Earth-sized planets outside the...

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    Earth-like Biospheres on other Planets may be Rare

    June 25, 2021, Categories  Astronomy/Space

    An artistic representation of the potentially habitable planet Kepler 422-b (left), compared with Earth (right).
    Credit
    Ph03nix1986 / Wikimedia Commons
    Licence type
    Attribution-ShareAlike (CC BY-SA 4.0)

    A new analysis of known exoplanets has revealed that Earth-like conditions on potentially habitable planets may be much rarer than previously thought. The work focuses on the conditions required for oxygen-based photosynthesis to develop on a planet, which would enable complex biospheres of the type found on Earth. The study is published today in Monthly Notices of the Royal Astronomical Society.

    The number of confirmed planets in our own Milky Way galaxy now numbers into the thousands...

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    ‘Twins’ of Superstar Eta Carinae found in Other Galaxies

    January 7, 2016, Categories  Astronomy/Space

    Location of Eta twins in galaxies M51, M101, NGC 6946, and M83. Individual Image Credits: M51: NASA/ESA/Hubble Heritage Team (STScI/AURA); M101:NASA/ESA/K. Kuntz (JHU), F. Bresolin (U. Hawaii), J. Trauger (Jet Propulsion Lab), J. Mould (NOAO), Y.-H. Chu (U. Illinois, Urbana), Canada-France-Hawaii Telescope/ J.-C. Cuillandre/Coelum/, Jacoby, B. Bohannan, and M. Hanna/ NOAO/AURA/NSF; NGC 6946: NASA/ESA/STScI/R. Gendler/Subaru Telescope (NAOJ); M83: NASA/ESA/Hubble Heritage Team (STScI/AURA) Credit: NASA, ESA and R. Khan (GSFC and ORAU)

    Location of Eta twins in galaxies M51, M101, NGC 6946, and M83. Individual Image Credits: M51: NASA/ESA/Hubble Heritage Team (STScI/AURA); M101:NASA/ESA/K. Kuntz (JHU), F. Bresolin (U. Hawaii), J. Trauger (Jet Propulsion Lab), J. Mould (NOAO), Y.-H. Chu (U. Illinois, Urbana), Canada-France-Hawaii Telescope/ J.-C. Cuillandre/Coelum/, Jacoby, B. Bohannan, and M. Hanna/ NOAO/AURA/NSF; NGC 6946: NASA/ESA/STScI/R. Gendler/Subaru Telescope (NAOJ); M83: NASA/ESA/Hubble Heritage Team (STScI/AURA) Credit: NASA, ESA and R. Khan (GSFC and ORAU)

    Eta Carinae, the most luminous and massive stellar system within 10,000 light-yrs, is best known for an enormous eruption seen in the mid-19th century that hurled an amount of material at least 10X the sun’s mass into space...

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