HD 209458b atmosphere - Search
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  1. Wikipedia
    https://en.wikipedia.org/wiki/HD_209458_b

    HD 209458 b - Wikipedia

    • HD 209458 b is an exoplanet that orbits the solar analog HD 209458 in the constellation Pegasus, some 157 light-years (48 parsecs) from the Solar System. The radius of the planet's orbit is 0.047 AU (7.0 million km; 4.4 million mi), or one-eighth the radius of Mercury's orbit (0.39 AU (36 million mi; 58 million km)). This small radius results in a year that is 3.5 Eart… See more

    Detection and discovery

    Spectroscopic studies first revealed the presence of a planet around HD 209458 on November 5, 1999. Astronomers had … See more

    Rotation

    In August 2008, the measurement of HD 209458 b's Rossiter–McLaughlin effect and hence spin–orbit angle is −4.4 ± 1.4°.
    The study in 2012, updated the spin-orbit angle to −5±7°. See more

    Physical characteristics

    The atmosphere is at a pressure of one bar at an altitude of 1.29 Jupiter radii above the planet's center.
    Where the pressure is 33±5 millibars, the atmosphere is clear (probably hydrogen) and its … See more

    Magnetic field

    In 2014, a magnetic field around HD 209458 b was inferred from the way hydrogen was evaporating from the planet. It is the first (indirect) detection of a magnetic field on an exoplanet. The magnetic fi… See more

    See also

    • 51 Pegasi b
    • YZ Ceti another extra solar planet with evidence of magnetic fields
    • HAT-P-11b another extra solar planet with evidence of magnetic fields… See more

    Wikipedia text under CC-BY-SA license
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    Table of Contents
    Detection and discovery
    Rotation
    Physical characteristics
    Magnetic field
    See also
     

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  2. NASA Astrobiology
    https://astrobiology.nasa.gov/news/atmosphere-of...

    Atmosphere of an Extrasolar Planet Detected for the First Time

     
  4. Science Mission Directorate
    https://science.nasa.gov/resource/hd-209458b

    HD 209458b - NASA Science

  5. Science Mission Directorate
    https://science.nasa.gov/exoplanet-catalog/hd-209458-b

    HD 209458 b - NASA Science

  6. Astronomy & Astrophysics (A&A)
    https://www.aanda.org/articles/aa/full_html/2021/...

    The atmosphere of HD 209458b seen with ESPRESSO

  7. Science Mission Directorate
    https://science.nasa.gov/universe/exoplanets/exo...

    Happy Anniversary, Osiris - NASA Science

  8. Britannica
    https://www.britannica.com/topic/HD-209458b

    HD 209458b | Distance, Characteristics, & Facts | Britannica

  9. ESA/Hubble
    https://esahubble.org/news/heic0403

    Oxygen and carbon discovered in exoplanet atmosphere 'blow-off'

  10. Nature
    https://www.nature.com/articles/nature01448

    An extended upper atmosphere around the extrasolar planet

  11. arXiv.org
    https://arxiv.org/pdf/2101.04094.pdf
    [PDF]

    The atmosphere of HD 209458b seen with ESPRESSO

  12. Nature
    https://www.nature.com/articles/nature05525

    The signature of hot hydrogen in the atmosphere of …

    WEBFeb 1, 2007 · New Hubble Space Telescope observations of HD 209458b reveal a hot dense layer in its atmosphere where the temperature rises and atmospheric gas accelerates to escape the planet.

  13. Nature
    https://www.nature.com/articles/nature09111

    The orbital motion, absolute mass and high-altitude winds of

  14. EarthSky
    https://earthsky.org/space/migrating-exoplanet-chemical-fingerprint

    Chemical fingerprint reveals a migrating exoplanet - EarthSky

  15. ESA Science & Technology
    https://sci.esa.int/web/hubble/-/34567-oxygen-and...

    Oxygen and carbon discovered in exoplanet atmosphere 'blow …

  16. IOPscience
    https://iopscience.iop.org/article/10.1086/590075/...

    Transmission Spectra of HD 209458b - IOPscience

  17. Astronomy & Astrophysics (A&A)
    https://www.aanda.org/articles/aa/full_html/2022/...

    Exploring the deep atmospheres of HD 209458b and WASP-43b …

  18. Science | AAAS
    https://www.science.org/doi/10.1126/science.1257829

    Magnetic moment and plasma environment of HD 209458b as

  19. NASA Exoplanet Archive
    https://exoplanetarchive.ipac.caltech.edu/overview/HD 209458 b

    HD 209458 | NASA Exoplanet Archive

  20. Science Mission Directorate
    https://science.nasa.gov/missions/hubble/nasa...

    NASA Finds Super-Hot Planet with Unique Comet-Like Tail

  21. arXiv.org
    https://arxiv.org/abs/2101.04094

    The atmosphere of HD 209458b seen with ESPRESSO. No …

  22. IOPscience
    https://iopscience.iop.org/article/10.1086/591835/...

    Albedo of Exoplanet HD 209458b - IOPscience

  23. Astronomy & Astrophysics (A&A)
    https://www.aanda.org/articles/aa/full_html/2020/...

    Broadband transmission spectroscopy of HD 209458b with …

  24. PubMed
    https://pubmed.ncbi.nlm.nih.gov/17268463

    The signature of hot hydrogen in the atmosphere of the ... - PubMed

  25. wikipedia.org
    https://ca.wikipedia.org/wiki/HD_209458_b

    HD 209458 b - Viquipèdia, l'enciclopèdia lliure

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