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    NIRSpec tagged posts

    Tiny Bright Objects discovered at Dawn of Universe baffle scientists

    June 30, 2024, Categories  Astronomy/Space

    Circles of light on a black background
    Researchers investigated three mysterious objects in the early universe. Shown here are their color images, composited from three NIRCam filter bands onboard the James Webb Space Telescope. They are remarkably compact at red wavelengths (earning them the term “little red dots”) with some evidence for spatial structure at blue wavelengths. Credit: Provided by researchers / Penn State. All Rights Reserved.

    A recent discovery by NASA’s James Webb Space Telescope (JWST) confirmed that luminous, very red objects previously detected in the early universe upend conventional thinking about the origins and evolution of galaxies and their supermassive black holes.

    An international team, led by Penn State researchers, using the NIRSpec instrument aboard JWST as part of the RUBIES survey...

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    Reconnaissance of Potentially Habitable Worlds with Webb

    June 6, 2024, Categories  Astronomy/Space

    This infographic compares the characteristics of three classes of stars in our galaxy: Sunlike stars are classified as G stars; stars less massive and cooler than our Sun are K dwarfs; and even fainter and cooler stars are the reddish M dwarfs. The size of the habitable zone is different for each class of star. In our solar system, the habitable zone begins just beyond the orbit of Venus and almost encompasses Mars. Credits: NASA, ESA and Z. Levy (STScI)

    Exoplanets are common in our galaxy, and some even orbit in the so-called habitable zone of their star. NASA’s James Webb Space Telescope has been busy observing a few of these small, potentially habitable planets, and astronomers are now hard at work analyzing Webb data. We invite Drs...

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    Unlocking the Secrets of a ‘Hot Saturn’ and its Spotted Star

    January 14, 2024, Categories  Astronomy/Space

    Led by researchers from Université de Montréal’s Trottier Institute for Research on Exoplanets (iREx), a team of astronomers has harnessed the power of the revolutionary James Webb Space Webb Telescope (JWST) to study the “hot Saturn” exoplanet HAT-P-18 b.

    Their findings, published last month in the journal Monthly Notices of the Royal Astronomical Society, paint a complete picture of the HAT-P-18 b’s atmosphere while exploring the great challenge of distinguishing its atmospheric signals from the activity of its star.

    HAT-P-18 b is located over 500 light-years away with a mass similar to Saturn’s but a size closer to that the larger planet Jupiter. As a result, the exoplanet has a “puffed-up” atmosphere that is especially ideal for analysis.

    Passing over a spotted star

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    Webb finds Water Vapor, but is it from a Rocky Planet or its Star?

    May 3, 2023, Categories  Astronomy/Space

    Graph showing the transmission spectrum of exoplanet GJ486b. The X-axis shows amount of light blocked, and the Y-axis shows wavelength of light. An orange wave begins at the upper left and a blue at the lower left. White dots show Webb data.
    This graphic shows the transmission spectrum obtained by Webb observations of rocky exoplanet GJ 486 b. The science team’s analysis shows hints of water vapor; however, computer models show that the signal could be from a water-rich planetary atmosphere (indicated by the blue line) or from starspots from the red dwarf host star (indicated by the yellow line). The two models diverge noticeably at shorter infrared wavelengths, indicating that additional observations with other Webb instruments will be needed to constrain the source of the water signal.
    Credits: NASA, ESA, CSA, Joseph Olmsted (STScI)

    GJ486b is about 30% larger than the Earth and three times as massive, which means it is a rocky world with stronger gravity than Earth. It orbits a red dwarf star in just under 1...

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