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    DRAGONFotografie z vesmíru a kosmonautiky +videa
    ARAON
    ARAON --- ---
    +4
    Japan Has Successfully Landed The First Ever Rovers On An Asteroid | IFLScience
    https://www.iflscience.com/...ce/japan-has-successfully-landed-the-first-ever-rovers-on-an-asteroid/
    MATT
    MATT --- ---
    TOXICMAN: zrova jsem to sem chtel soupnout.. tak aspon komentar ;)

    Alexander Gerst @Astro_Alex 20 hours ago
    Watch out, America! #HurricaneFlorence is so enormous, we could only capture her with a super wide-angle lens from the @Space_Station, 400 km directly above the eye. Get prepared on the East Coast, this is a no-kidding nightmare coming for you. #Horizons
    TOXICMAN
    TOXICMAN --- ---
    1 odpověď+20


    ALOPEX_LAGOPUS
    ALOPEX_LAGOPUS --- ---
    +5
    IPTV platforma Kuki začala testovat vesmírný kanál NASA v Ultra HD (4K) rozlišení - Lupa.cz
    https://www.lupa.cz/...v-platforma-kuki-zacala-testovat-vesmirny-kanal-nasa-v-ultra-hd-4k-rozliseni/
    Sice to mam jen v HD ,ale skvelej kanál bez keců.

    TOXICMAN
    TOXICMAN --- ---
    +16
    TOXICMAN
    TOXICMAN --- ---
    +7
    BLACKHEAD
    BLACKHEAD --- ---
    TURNPIKE: Pravda, vubec jsem elypsu nevzal v potaz... :-( A ani fakt, ze v pripade pohybu po elypse, jak je naznaceno se meni rychlost dost vyrazne, takze "2.5% c" bude jen max rychlost... :-(
    TURNPIKE
    TURNPIKE --- ---
    1 odpověď
    BLACKHEAD: vypocty mas ozaj chabe, kedze si pravdepodobne ratal s pohybom po kruznici. v skutocnosti obieha s e=0.87, takze S0-02 obieha okolo barycentra vo vzdialenosti 120AU v periapsi a 1730 AU v apoapsi
    BLACKHEAD
    BLACKHEAD --- ---
    1 odpověď
    TROGLODYT: Dle mych chabych vypoctu z toho vyplyva, ze ta 15-ti leta hvezda tu diru obiha zhruba ve vzdalenosti 2722 AU. Wau :-o
    TROGLODYT
    TROGLODYT --- ---
    1 odpověď+6
    TROGLODYT: velkou. Tu S02 zrovna ted v periheliu pozorujou pri rychlosti 2.5% c ... (a odpozorovali potvrdili na tom gravitacni redshift!!!
    ...titulek trochu keca, ty hvezdy obihaji malou cernou diru a az celej tenhle cluster obiha tu centralni.
    Ty dve neblizsi hvezdy S02 a S102 maji 11 a 15 let obeznou dobu!!!
    DRON: jeste par linku
    S2 and Central Black Hole
    http://solstation.com/x-objects/s2.htm
    UCLA Galactic Center Group
    http://www.galacticcenter.astro.ucla.edu/animations.html
    DRON
    DRON --- ---
    1 odpověď
    TROGLODYT: odkladam si k precteni pozdeji :-) https://www.zmescience.com/space/closest-star-black-hole-orbit-milky-way-20313/
    TROGLODYT
    TROGLODYT --- ---
    2 odpovědi
    DRON: behem par let ... jakou rychlosti se ty hvezdy musej pohybovat??!!!
    DRON
    DRON --- ---
    1 odpověď+16
    323K13L: ja teď narazil na tohle a nějak se mi dočasně nedaři přivřít ústa :-)

    Stars orbiting the black hole at the heart of the Milky Way
    Stars orbiting the black hole at the heart of the Milky Way | ESO
    http://www.eso.org/public/videos/eso1825e/
    323K13L
    323K13L --- ---
    1 odpověď+44
    Krabí mlhovina - deset snímků v průběhu 10 let, celkem 32 hodin dat, Detlef Hartmann (Rakousko)
    tech info: https://www.astrobin.com/327338/?nc=user
    DRAGON
    DRAGON --- ---
    +4
    The 'air conditioners' that the Apollo astronauts were seen carrying with them to the transfer van during launch day were Portable Oxygen Ventilators. The POV's pre-oxygenated the astronaut and purged the nitrogen from their body, which was needed during altitude testing/training in the spacecraft as well as for launch to prevent 'the bends.' In addition to providing breathing oxygen, the POV kept the space suit pressurized, dehumidified and cooled as well as helped remove moisture from the body. There were different models of the POV, but they generally lasted approximately 30 minutes and after the astronaut was on his way in the transfer van to the launch pad, he would be connected to a fully charged POV and then eventually connected to the Command Modules suit circuit once inside the spacecraft. There was also an open-loop ventilator that was similar in operation to the POV, except used only for cooling when the helmets & gloves were off.

    DRAGON
    DRAGON --- ---
    +6
    FIRST MAN Trailer (2018)
    http://www.youtube.com/watch?v=5Eimb4cy7UY
    DRAGON
    DRAGON --- ---
    +14
    Titan and Rhea passing in the cosmic night...Credit: NASA/SSI - Cassini mission

    DRAGON
    DRAGON --- ---
    +11
    The Ant Nebula

    DRAGON
    DRAGON --- ---
    TURNPIKE: sorry, nekontroloval sem to, spis sem to sem hodil jako joke
    TURNPIKE
    TURNPIKE --- ---
    1 odpověď+4
    DRAGON: viem ze nemas rad fakty a tak, ale na zemi vzdialenost osciluje od 586mil km pre opoziciu v periheliu po 968mil km pre konjukciu v afeliu
    Kliknutím sem můžete změnit nastavení reklam