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  1. #941
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    NASA is losing the race to build a better rocket
    Multiple powerful rockets are coming online soon — but how do they stack up next to each other?
    ...

    ...
    The main problem revolves around the fuel, or propellant, you need for the trip. Earth has a pretty sizable gravity well, so a vehicle has to burn lots of propellant to reach a speed of thousands of miles per hour needed to break free of the planet’s pull. For particularly heavy cargo or human crews going into deep space, even more propellant is needed; the engine has to burn longer to compensate for the extra weight and distance. Propellant is heavy and takes up a lot of space — that’s why you need a huge rocket to house it all. And the more propellant you add, the more propellant you need to lift it all.
    ...
    https://www.theverge.com/2017/5/10/1...-origin-spacex
    Given the hazards of landing on Mars, SpaceX may send two Dragons in 2020
    Elon Musk has spoken favorably about NASA's Mars Exploration Rover missions.

    https://arstechnica.com/science/2017...agons-in-2020/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  2. #942
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    That 'Alien Megastructure' Star Is Freaking Out Again

    It’s almost certainly not aliens, but once again, Tabby’s Star is acting hella weird. The star that first became our planetary obsession back in the fall of 2015—when astronomer Jason Wright suggested its weird flickering behavior might be the result of an alien megastructure—is, once again, flickering. But unlike previous stellar glitches, astronomers are now prepared to study it in the act.

    http://gizmodo.com/that-alien-megast...ain-1795385620
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  3. #943
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    Dragon flies, Falcon lands—another good day for SpaceX
    The Dragon spacecraft will now spend the better part of three days reaching station.

    https://arstechnica.com/science/2017...-fly-a-dragon/
    SpaceX sticks 11th rocket landing after launching first used Dragon capsule
    Five ground landings attempted and five ground landings achieved

    https://www.theverge.com/2017/6/3/15...sa-used-dragon
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  4. #944
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    Saturday’s SpaceX launch carried a surprise payload—a Chinese experiment
    US company has ensured that Chinese experiment cannot transfer tech from station.
    ...
    That's significant, as Congress has barred NASA from working directly with China since 2011, when then U.S. Rep. Frank Wolf added a prohibition to NASA's budget. He was worried that the Chinese government might steal US spaceflight secrets, and had concerns about the country's human rights record.
    ...
    https://arstechnica.com/science/2017...se-experiment/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  5. #945
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    Giant ringed planet may have been spotted as it eclipses its host star
    And its next passage is expected later this year.



    https://arstechnica.com/science/2017...its-host-star/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  6. #946
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    Haja planetas descobertos..saber se há vida é que está complicado.

  7. #947
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    Citing costs, US Air Force turns to SpaceX for its next spy plane launch
    “There are some very exciting things happening in commercial space.”

    https://arstechnica.com/science/2017...s-next-flight/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  8. #948
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    India Just Launched Its Giant 'Monster' Rocket

    http://gizmodo.com/india-just-launch...ket-1795812284
    Mystery Of The "Wow!" Signal Solved?
    ...
    A team of researchers from Center of Planetary Science proposed a hypothesis that a comet might be the source. After testing they found that a comet does emit radio waves at the same frequency of the "Wow!" signal.
    ...
    https://www.hardocp.com/news/2017/06...ignal_solved63
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  9. #949
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    Colonizing Mars: Elon Musk's vision for 1 million people over the next 100 years

    Elon Musk has clear plans to colonize Mars; he thinks that if we advance tech over the next 50 to 100 years, we might be able to get 1 million people over there.

    https://www.neowin.net/news/colonizi...next-100-years
    A spy satellite buzzed the space station this month, and no one knows why
    An accidental flyby may represent “gross incompetence” on the part of the feds.

    https://arstechnica.com/science/2017...one-knows-why/
    Air Force budget reveals how much SpaceX undercuts launch prices
    Spoiler alert: It’s a lot.
    ...
    For example, about 14 months ago, the Air Force awarded SpaceX an $83 million contract to launch a GPS 3 satellite. And in March 2017, SpaceX won a contract to launch another GPS 3 satellite for $96.5 million. These represent "all-in, fully burdened costs" to the government, and so they seem to be roughly comparable to the $422 million "unit cost" in the Air Force budget for 2020.
    ...
    https://arstechnica.com/science/2017...launch-prices/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  10. #950
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    This Is One of the Coolest Shots of the Mars Curiosity Rover We've Ever Seen

    See that faint, blue dot in the middle of this NASA image? That’s the Curiosity rover making its way up the rocky slopes of Mount Sharp.



    http://gizmodo.com/this-is-one-of-th...ity-1796293399
    NASA's Mars rover is really good at laser-blasting rocks without human input
    Curiosity has been studying Mars on its own for a year

    https://www.theverge.com/2017/6/21/1...am-laser-rocks
    A Mysterious Mars-Sized Object Could Be Hiding at the Edge of Our Solar System
    ...

    Since then, the hunt for Planet X—aptly renamed Planet 9—has grown into an international movement to find such an object in the Kuiper Belt beyond Neptune’s orbit. Now, scientists Kat Volk and Renu Malhotra from the University of Arizona’s Lunar and Planetary Laboratory are upping the ante—they suggest that a completely different, tenth planetary-mass object is hiding somewhere in the Kuiper Belt as well. Is someone keeping track of all these goddamn hypothetical planets?
    ...
    http://gizmodo.com/a-mysterious-mars...e-e-1796343294
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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