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    DRAGONFotografie z vesmíru a kosmonautiky +videa
    ATOMIKS
    ATOMIKS --- ---
    DRAGON: nevím, jak se tomu odborně říká česky, ale jde na fotce vidět antiocas .o)
    viz dnešní apod: "The antitail is composed of dust previously released and fanning out away from the Sun along the comet's orbit, visible as a needle-like extension below the bright coma"
    DRAGON
    DRAGON --- ---
    z netu, Podbeskydí

    MEI
    MEI --- ---
    ELECTRICKOTA: Na preview vidím kosmonauta v nafukovacím člunu a říkám si, že je to dobrý úlet :-)
    WERT
    WERT --- ---
    WERT
    WERT --- ---
    [4K] Watch SpaceX Catch A Starship Rocket From Space!!! #IFT5
    https://www.youtube.com/watch?v=pIKI7y3DTXk
    BLACKHEAD
    BLACKHEAD --- ---
    ELECTRICKOTA: Hm.. fakt pech. :-(

    Ale diky za video! :-)

    Snad priste uvidime neco lepsiho...
    ARAON
    ARAON --- ---
    FURAN: Meli to nacasovany uplne blbe. Ale myslim, ze meli trochu trable s otevrenim toho poklopu a nez to vyresili, byli prakticky ve tme.
    FURAN
    FURAN --- ---
    ELECTRICKOTA: Muselo sakra zamrzet, že už nestihla takhle vykouknout na denní straně Země.
    ELECTRICKOTA
    ELECTRICKOTA --- ---
    BLACKHEAD: to jsem si říkal taky tak jsem si ho našel
    SpaceX Polaris Dawn spacewalk! See Sarah Gillis exit Dragon spacecraft
    https://youtu.be/YRlonyqtfjM?si=leri5fZJEDnXw7-H

    No a byl jsem ještě víc zklamanej :D
    BLACKHEAD
    BLACKHEAD --- ---
    VIDURIUS: Tohle video mne zklamalo. Zabery planety pekny. Ale cekal jsem, kdy tam vykoukne nejakej ten astronaut... A nic! :-(
    VIDURIUS
    VIDURIUS --- ---
    SpaceX nedávno zveřejnilo nádherné záběry z oběžné dráhy z mise Polaris Dawn, při které proběhl historicky první výstup soukromého astronauta do volného kosmického prostoru. https://youtu.be/5_DZtCYhdXc?si=Js-83EtBeXMHITkH
    DRAGON
    DRAGON --- ---
    SPIKE411: u toho videa je strasna skoda te webove komprese :(( jinak naprosto uzasny
    SPIKE411
    SPIKE411 --- ---
    x.com
    https://x.com/dominickmatthew/status/1840398906670133414/

    Comet rises above the horizon just before orbital sunrise amongst aurora and swirling satellites.

    Timelapse composed from 1/4s, 50mm, f1.2, ISP 6400 images played at 30fps.
    DRAGON
    DRAGON --- ---
    DIXIE: jop
    DRAGON
    DRAGON --- ---
    DESTROYER: aha, koukam, ale ted uz to neni tak pekny, uz je to zaneseny mrakama (ono se to updatuje v čase:)
    DIXIE
    DIXIE --- ---
    DRAGON: dlouho jsem to prolejzal a koukal jestli tam neni i druha polokoule a až mi doslo ze NOAA je US ;)
    DESTROYER
    DESTROYER --- ---
    DRAGON: Primo pod tim odkazem co jsi k o tomu dal. :) Stahl jsem 20242711340_GOES16-ABI-FD-GEOCOLOR-21696x21696.jpg a je komplet.
    DRAGON
    DRAGON --- ---
    nejnovější fotky Země vyfocený GOES satelitem. Škoda, že je to říznutý dole, to by byl krásnej wallpaper :) Kdybyste tu fotku někdo našel bez říznutýho jižního pólu, hoďte sem odkaz, pls.

    GOES-East - Latest Full Disk Images - NOAA / NESDIS / STAR
    https://www.star.nesdis.noaa.gov/goes/fulldisk.php?sat=G16

    DESTROYER
    DESTROYER --- ---
    x.com
    https://x.com/i/status/1830644312948003289

    "Here’s the time-lapse I promised you from yesterday’s solar activity. Complete with Earth to scale and a bonus of the sun’s rotation.

    This is easily one of my cleanest time-lapses I’ve managed over such a long period. Enjoy!"
    DRAGON
    DRAGON --- ---
    zajimavy objev :)

    Exoplanet LHS 1140 b:

    Telescopes used:
    MEarth-North observatory, Hubble, JWST, TESS, Spitzer etc.

    Host star: LHS 1140 (Red Dwarf)
    Distance: 48 light-years
    Stellar activity: Calm [No harmful flares]

    Planet position: Habitable zone
    Tidal-locking: Yes [one side always star-facing]
    Type: Super-Earth [very recently confirmed by JWST]
    Mass: 5.6 times mass of Earth
    Radius: 70% larger than Earth
    Mean density: 5.9±0.3 g/cm3 [Earth= 5.51 g/cm3]
    Planetary geology: rocky, ice-rich [Snowball]

    Planetary atmosphere: Exists! [JWST data]
    [only habitable zone exoplanet known till date to have one]

    Atmospheric composition: Nitrogen-rich (tentative result)

    Surface H2O: High probability (density suggests 10%-20% of planet mass is H2O)
    Temperature in star-facing side: 20 deg Celsius/68 deg Fahrenheit
    Surface liquid water: High probability in star-facing side

    If true, the habitable-zone planet has--

    1) a substantial atmosphere [a secondary atmosphere formed due to volcanic activity and comet impacts similar to Earth] and

    2) a substantial hydrosphere [an ocean of 4000 km diameter]

    Caution: More observations must be done, especially with JWST, for concrete verification

    Future observation opportunity:

    1) A large-scale (500 hours of Director’s Discretionary Time) survey of rocky exoplanets around nearby M-dwarf stars in JWST observation cycle 3 [to start mid next year]
    2) ~250 orbits of ultraviolet observations with the Hubble Space Telescope to characterize the activity of the host stars in parallel to JWST survey

    Image: representative
    [direct imaging of this planet is not possible with today's technology]

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