• úvod
  • témata
  • události
  • tržiště
  • diskuze
  • nástěnka
  • přihlásit
    registrace
    ztracené heslo?
    COMMANCHEDobyvani vesmiru a kosmonautika 🚀🛰️👩🏼‍🚀
    TOXICMAN
    TOXICMAN --- ---
    NASA JPL Live, Ustream.TV: NASA's Jet Propulsion Laboratory invites you to watch live about everything from Mars rovers to monitoring asteroids to cool cos...
    http://www.ustream.tv/nasajpl2
    TOXICMAN
    TOXICMAN --- ---
    Juno JOI Realtime Simulation
    http://www.lizard-tail.com/isana/orb/misc/juno_spacecraft/

    17.5km/s
    méně než milion km od Jupiteru
    10hodin do orbit insertion
    REDGUY
    REDGUY --- ---
    Vtipnej titulek a zajimavej obsah, co chtit vic 8)

    Why the Wings Stay on the Space Shuttle Orbiter During First Stage Ascent

    https://www.aiaa.org/.../History_and_Heritage/Final_Space_Shuttle_Launches/Why_the_Wings_Stay_On.pdf
    CLUMP
    CLUMP --- ---
    It's Official! NASA Pluto Probe to Fly by Another Object in 2019
    http://www.space.com/33332-new-horizons-pluto-probe-mission-extension.html

    NASA has approved a mission extension for New Horizons, which performed the first-ever flyby of Pluto in July 2015. The spacecraft is now set for a Jan. 1, 2019 flyby of a small object called 2014 MU69, which lies about 1 billion miles (1.6 billion kilometers) beyond Pluto in the dark and frigid Kuiper Belt.

    PAN_SPRCHA
    PAN_SPRCHA --- ---
    LUDO: me to teda v elite vzdycky sralo
    PRAASHEK
    PRAASHEK --- ---
    LUDO: asi je to baví
    LUDO
    LUDO --- ---
    preco vlastne zase riesia to manualne dokovanie? uz s tym raz skoro odrovnali Mir
    VIRGO
    VIRGO --- ---
    TOXICMAN: Dnes to komentoval Zak:
    Russian ISS docking system test doesn't go as planned - SpaceRef
    http://spaceref.com/...ional-space-station/russian-iss-docking-system-test-doesnt-go-as-planned.html
    TOXICMAN
    TOXICMAN --- ---
    wtf, pusťte si uplný konec...

    Russian Docking System Tested Aboard the ISS
    https://www.youtube.com/watch?v=qMjLYra-Kak
    XCHAOS
    XCHAOS --- ---
    BIDAK: použité jako 3.stupeň Saturnu 5 to mohlo vést k zajímavým misím, typu orbitery vnějších planet nebo dokonce landery na jejich měsících, i při úrovni technologie 70.let. Ale pro pilotované mise by to bylo fakt krkolomné - viz předchozí.
    XCHAOS
    XCHAOS --- ---
    THERIDANE: je to fascinující, ale je dobré si uvědomit, že by byl povolený pouze velmi úzký sektor, ve kterém by Apollo CSM nebo MAV mohlo dokovat s nukleárním stupněm, aby mezi posádkou a reaktorem byla zaručeně palivová nádrž. Jinak by radiace z v podstatě nestíněného paliva reaktoru mohla být pro posádku smrtící.

    a taky dlouhodobé skladování vodíku (pracovní látka motoru NERVA) v kosmu nebylo v podstatě vyřešené dodnes, takže prakticky ten stupeň šlo použít pouze pro TMI manévr krátce po startu. ale jako stejně je obdivuhodné, že tu technologii fakt měli a mohli teoreticky použít...

    dnes se u Marsu počítá spíš s aerobrakingem, případně aerocapture, což v +/- kompenzuje lepší specifický impuls, který by měl nukleární motor, použitý pro konvenční brždění...
    KEB
    KEB --- ---
    ICE: Já byl na dvou přednáškách pana Přibyla a obě byly super. Doporučuju i zbytek. :)
    BIDAK
    BIDAK --- ---
    A tady je příslušnej wiki článek:
    NERVA - Wikipedia, the free encyclopedia
    https://en.wikipedia.org/wiki/NERVA
    THERIDANE
    THERIDANE --- ---
    ICE: na to téma doporučuju tohle 1968 NASA video :)

    Nuclear Propulsion In Space 1968 NERVA Manned Mars mission NASA video
    https://www.youtube.com/watch?v=b18HtG0DOCM
    ICE
    ICE --- ---
    KEB: pekna prednaska. //ta cast s pokusy s atomovym motorem co v US probihal do roku 72 je teda pekna divocina :-O ;]]
    KEB
    KEB --- ---
    Ing. Tomáš Přibyl, Příběh opravdového Marťana
    https://www.youtube.com/watch?v=xXPIJkz4jHo


    tohohle pána znáte? Myslím ing Přibyla :)
    VIRGO
    VIRGO --- ---
    Zítra v 16:05 SELČ:
    http://www.nasa.gov/...ation/systems/sls/multimedia/second-qualification-ground-booster-test-June-28
    A test version of the booster for NASA's new rocket, the Space Launch System, will fire up for the second of two qualification ground tests
    at 10:05 a.m. EDT (8:05 a.m. MDT) Tuesday, June 28 at prime contractor Orbital ATK's test facility in Promontory, Utah. NASA Television will
    air live coverage of the booster test June 28 beginning at 9:30 a.m.

    CLUMP
    CLUMP --- ---
    Vast Water Ocean Detected On Pluto --"Absolutely Incredible" (Monday's Most Popular) - The Daily Galaxy --Great Discoveries Channel
    http://www.dailygalaxy.com/.../2016/06/vast-water-ocean-detected-on-pluto-absolutely-incredible.html

    When the NASA's New Horizons spacecraft buzzed by Pluto last year, it revealed tantalizing clues that the dwarf planet might have -- or had at one time -- a liquid ocean sloshing around under its icy crust. According to a new analysis such an ocean likely still exists today.

    The study, which used a thermal evolution model for Pluto updated with data from New Horizons, found that if Pluto's ocean had frozen into oblivion millions or billions of years ago, it would have caused the entire planet to shrink. But there are no signs of a global contraction to be found on Pluto's surface. On the contrary, New Horizons showed signs that Pluto has been expanding.

    "Thanks to the incredible data returned by New Horizons, we were able to observe tectonic features on Pluto's surface, update our thermal evolution model with new data and infer that Pluto most likely has a subsurface ocean today," said Noah Hammond, a Ph.d candidate in Brown University's Department of Earth, Environmental and Planetary Sciences, and the study's lead author.

    XCHAOS
    XCHAOS --- ---
    CLUMP: "This new manned capsule is expected to replace the Shenzhou spacecraft in 5 to 9 years (~2020-2025)."
    China’s new Long March 7 rocket successful on first flight – Spaceflight Now
    http://spaceflightnow.com/2016/06/25/chinas-new-long-march-7-rocket-successful-on-first-flight/
    CLUMP
    CLUMP --- ---
    Scientists Confirm: Comets Smell Like Cat Piss
    http://gizmodo.com/scientists-confirm-comets-smell-like-cat-piss-1782484882

    Rotten eggs, cat urine, bitter almonds—that’s the delightful elixir of aromas comprising the BO of one comet 67P, also known as Rosetta’s comet. In a heartwarmingly nerdy yet mildly alarming development, members of the Rosetta mission team have commissioned scent firm The Aroma Company to turn it into a perfume.

    Kliknutím sem můžete změnit nastavení reklam