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    Category Astronomy/Space

    James Webb Space Telescope detects Water Vapor, Sulfur Dioxide and Sand Clouds in the Atmosphere of a nearby Exoplanet

    November 17, 2023, Categories  Astronomy/Space

    A transmission spectrum of the warm Neptune exoplanet WASP-107b, captured by the Low Resolution Spectrometer (LRS) of the Mid InfraRed Instrument (MIRI) on board JWST, reveals evidence for water vapour, sulfur dioxide, and silicate (sand) clouds in the planet’s atmosphere.

    European astronomers, co-led by researchers from the Institute of Astronomy, KU Leuven, used recent observations made with the James Webb Space Telescope to study the atmosphere of the nearby exoplanet WASP-107b. Peering deep into the fluffy atmosphere of WASP-107b they discovered not only water vapour and sulfur dioxide, but even silicate sand clouds. These particles reside within a dynamic atmosphere that exhibits vigorous transport of material.

    Astronomers worldwide are harnessing the advanced capabilities of...

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    ‘Bouncing’ Comets could deliver Building Blocks for Life to Exoplanets

    November 16, 2023, Categories  Astronomy/Space

    Artist's impression of a meteor hitting Earth

    How did the molecular building blocks for life end up on Earth? One long-standing theory is that they could have been delivered by comets. Now, researchers from the University of Cambridge have shown how comets could deposit similar building blocks to other planets in the galaxy.

    In order to deliver organic material, comets need to be travelling relatively slowly – at speeds below 15 kilometres per second. At higher speeds, the essential molecules would not survive – the speed and temperature of impact would cause them to break apart.

    The most likely place where comets can travel at the right speed are ‘peas in a pod’ systems, where a group of planets orbit closely together...

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    Galactic ‘Lightsabers’: Answering Longstanding Questions about Jets from Black Holes

    November 15, 2023, Categories  Astronomy/Space

    1. A simple black hole model.
    To test the connection between black hole images and energy flow around black holes, the team used both simple models of a glowing ring of gas (left) and full 3D supercomputer simulations (right). By verifying that the connection between the spiral of polarization in the images persisted in both cases, they established that it could be potentially be used with real images of black holes from the Event Horizon Telescope (EHT) to test if magnetic fields are extracting energy and spinning down the black hole.
    Images by Andrew Chael, George Wong, Alexandru Lupsasca and Eliot Quataert, Princeton Gravity Initiative
    2. A 3D supercomputer simulation of M87*

    The one thing everyone knows about black holes is that absolutely everything nearby gets sucked into them.

    A...

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    Second-most Distant Galaxy discovered using James Webb Space Telescope

    November 14, 2023, Categories  Astronomy/Space

    composite image of pandora's cluster, with two close-up inset images
    The second- and fourth-most distant galaxies ever seen (UNCOVER z-13 and UNCOVER z-12) have been confirmed using the James Webb Space Telescope’s Near-Infrared Camera (NIRCam). The galaxies are located in Pandora’s Cluster (Abell 2744), shown here as near-infrared wavelengths of light that have been translated to visible-light colors. The scale of the main cluster image is labelled in arcseconds, which is a measure of angular distance in the sky. The circles on the black-and-white images, showing the galaxies in the NIRCam-F277W filter band onboard JWST, indicate an aperture size of 0.32 arcsec. Credit: Cluster image: NASA, UNCOVER (Bezanson et al., DIO: 10.48550/arXiv.2212.04026). Insets: Nasa, UNCOVER (Wang et al., 2023). Composition: Dani Zemba/Penn State. All Rights Reserved.
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