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San Francisco, 12:10 AM
Sun Nov 22
10 posts in the last 24 hours

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    Will Hayabusa Make It Back To Earth?

    Movements of the Storm

    A Galactic Jam Session To Celebrate 400 Years Of Stargazing

    Two Ancient White Dwarf Stars Are Packed With Oxygen

    When We Reach Pluto, The Adventure Will Just Be Beginning

    Secrets Of Astrophotography's Biggest Rock Star

    The Stormy Heart Of The Pinwheel Galaxy

    The Ultimate Space Porn: A 648 Megapixel Image Of Our Galaxy

    See The Ares I-X Launch Like Never Before

    Ares I-X Launch Gallery
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    Dsmvwl  Admin  Promote to frontpage Approve user Ban user ×
    Image of twophrasebark twophrasebark
    11/21/09

    In reply to Will Hayabusa Make It Back To Earth?
    It's so cute. I just want to give it a big space hug.
     Reply
    Edited by twophrasebark at 11/21/09 4:36 PM twophrasebark was starred twophrasebark was unstarred
    Image of crashedpc - Haifisch crashedpc - Haifisch
    11/21/09

    In reply to Will Hayabusa Make It Back To Earth?
    Looks like we need to send Ryu or Joe after it.
     Reply
    crashedpc - Haifisch was starred crashedpc - Haifisch was unstarred
    Image of Roklimber Roklimber
    11/21/09

    In reply to Will Hayabusa Make It Back To Earth?
    This is very sad. Compare NASA's Mars rovers, which outperformed their design specifications, with this probe.
     Reply
    Roklimber was starred Roklimber was unstarred
    Image of Chip Overclock Chip Overclock
    11/21/09

    @Roklimber: I can recommend ROVING MARS by Steve Squyres. Squyres was the head of the science team for the Rover mission. It's a great book if you're into [1] space, [2] tales of intrepid scientists as heros, or [3] high tech product development.
     Reply
    Chip Overclock was starred Chip Overclock was unstarred
    Image of Roklimber Roklimber
    11/21/09

    @Chip Overclock:

    Hey, thanks for the recommendation, Chip. I've now added it to my list of books to read. Here's the amazon link:

    [www.amazon.com]
     Reply
    Roklimber was starred Roklimber was unstarred
    Image of Chip Overclock Chip Overclock
    11/21/09

    @Roklimber: At risk of being a little too self-promotional, here's a blog article I wrote about ROVING MARS:

    [coverclock.blogspot.com]
     Reply
    Chip Overclock was starred Chip Overclock was unstarred
    Image of KhaiJB KhaiJB
    11/21/09

    In reply to Will Hayabusa Make It Back To Earth?
    "control, I can make it... I can make it....."
     Reply
    KhaiJB was starred KhaiJB was unstarred
    Image of bluehinter bluehinter
    11/19/09

    In reply to Movements of the Storm
    I'm sorry, but all storms must now be rated on the Metal Tornado scale.

    If it's not an unstoppable vortex of whirling jagged metal (or alternatively, some sort of evil djinn that looks like a tornado with badly CGIed red eyes), wake me when Bill Paxton shows up.
     Reply
    bluehinter was starred bluehinter was unstarred
    Image of the_amazing_doug the_amazing_doug
    11/20/09

    @bluehinter: sounds like a dethklok song.
     Reply
    bluehinter promoted this comment the_amazing_doug was starred the_amazing_doug was unstarred
    Image of bluehinter bluehinter
    11/20/09

    @the_amazing_doug:

    Hmm, maybe that's how SyFy channel gets it's movie ideas.
     Reply
    bluehinter was starred bluehinter was unstarred
    Image of Gann Gann
    11/18/09

    In reply to Movements of the Storm
    I wonder how fast those things move. It'd be cool to ride the eye all the way to land.
     Reply
    Gann was starred Gann was unstarred
    Image of Gann Gann
    11/18/09

    @Gann: Ah, found it. "Typically, a hurricane's forward speed
    averages around 15-20 mph"

    [hurricanes.noaa.gov]

    With eyes typically 20-40 miles wide, it would probably be fairly easy to thread it all the way to land. You'd better have a good place to dock quickly though and get under cover...
     Reply
    Gann was starred Gann was unstarred
    Image of Stormhunter Stormhunter
    11/19/09

    @Gann: having been through the eye of multiple 'canes, I can tell you that even in the eye the waves are HUGE (normally). The waves were jumping about 70-90 feet when they hit the seawall during Hurricane Ike (even during the calm of the eye). Not a place you'd want to put a boat.

    Of course, I'd love to try...
     Reply
    Gann promoted this comment Stormhunter was starred Stormhunter was unstarred
    Image of Gann Gann
    11/19/09

    @Stormhunter: I'm not saying it would be a sane, rational thing to do...
     Reply
    Gann was starred Gann was unstarred
    Image of twophrasebark twophrasebark
    11/18/09

    In reply to Movements of the Storm

     
     Reply
    twophrasebark was starred twophrasebark was unstarred
    Image of MargaretMoony MargaretMoony
    11/18/09

    In reply to Movements of the Storm
    That's Soooooooooo cool. Not so much if you got caught in it, but super pretty to look at.
     Reply
    MargaretMoony was starred MargaretMoony was unstarred
    Image of Bootknife-Jackson Bootknife-Jackson
    11/13/09

    In reply to A Galactic Jam Session To Celebrate 400 Years Of Stargazing
    and God saideth, "i need a new pair of pants."

    BTW- what does this look like in the visable spectrum? #space
     Reply
    Bootknife-Jackson was starred Bootknife-Jackson was unstarred
    Image of botanicidal botanicidal
    11/14/09

    @Bootknife-Jackson: You took the words right out of my mouth! I keep thinking: what would these look like if they didn't pseudocolour them, pre-black and white IR and UV imaging? #space
     Reply
    Bootknife-Jackson promoted this comment botanicidal was starred botanicidal was unstarred
    Image of Anekanta - former space marine Anekanta - former space marine
    11/13/09

    In reply to Two Ancient White Dwarf Stars Are Packed With Oxygen
    So could I swing on this star, and carry moon-beams home in a jar? #whitedwarfs
     Reply
    Anekanta - former space marine was starred Anekanta - former space marine was unstarred
    Image of Bootknife-Jackson Bootknife-Jackson
    11/13/09

    @Anekanta - Former Space Hippy!: as a scientist (much like Jeff Goldblum), i can tell with much certainty, that yes. You can indeed do these things on this star. #whitedwarfs
     Reply
    Bootknife-Jackson was starred Bootknife-Jackson was unstarred
    Image of Anekanta - former space marine Anekanta - former space marine
    11/13/09

    @Bootknife-Jackson: Heheh... what about the moon-beams? I needs me my moon-beams, or I start to get the shakes! #whitedwarfs
     Reply
    Anekanta - former space marine was starred Anekanta - former space marine was unstarred
    Image of Bootknife-Jackson Bootknife-Jackson
    11/13/09

    @Anekanta - Former Space Hippy!: HAHAHA. you need some liquid moon beams? i can get you those. real cheap. way better than blotter moon beams.... look, i deal in quality products here... #whitedwarfs
     Reply
    Bootknife-Jackson was starred Bootknife-Jackson was unstarred
    Image of Anekanta - former space marine Anekanta - former space marine
    11/14/09

    @Bootknife-Jackson: Far out, man!

    (I bet Sinatra didn't know what he was getting into when he wrote that song, did he?) #whitedwarfs
     Reply
    Anekanta - former space marine was starred Anekanta - former space marine was unstarred
    Image of Bootknife-Jackson Bootknife-Jackson
    11/14/09

    @Anekanta - Former Space Hippy!: ...or DID he!? #whitedwarfs
     Reply
    Bootknife-Jackson was starred Bootknife-Jackson was unstarred
    Image of Anekanta - former space marine Anekanta - former space marine
    11/15/09

    @Bootknife-Jackson: Heheheh... the world may never know! #whitedwarfs
     Reply
    Anekanta - former space marine was starred Anekanta - former space marine was unstarred
    Image of Quilt Quilt
    11/13/09

    In reply to Two Ancient White Dwarf Stars Are Packed With Oxygen

      #whitedwarfs
     Reply
    Quilt was starred Quilt was unstarred
    Image of FrankenPC FrankenPC
    11/13/09

    In reply to Two Ancient White Dwarf Stars Are Packed With Oxygen
    Habitable if you are made entirely of neutrons and can handle a million Gauss electromagnetic field. #whitedwarfs
     Reply
    FrankenPC was starred FrankenPC was unstarred
    Image of Daveinva Daveinva
    11/13/09

    @FrankenPC: Came in here to pretty much say that.

    If you can survive next to a white dwarf, needing oxygen would be the LEAST of your biological worries. #whitedwarfs
     Reply
    Daveinva was starred Daveinva was unstarred
    Image of Jes St.Lawrence Jes St.Lawrence
    11/13/09

    @FrankenPC: But why would Mangino leave Kansas? #whitedwarfs
     Reply
    Jes St.Lawrence was starred Jes St.Lawrence was unstarred
    Image of Indigen Indigen
    11/13/09

    @FrankenPC: I'm not a scientist.

    Are you saying we are susceptible to electromagnetic fields if they are strong enough? What happens? #whitedwarfs
     Reply
    FrankenPC promoted this comment Indigen was starred Indigen was unstarred
    Image of FrankenPC FrankenPC
    11/13/09

    @Indigen: All matter is subject to EM fields if they are strong enough.

    Check this out: [www.youtube.com]

    Frog levitating over a VERY powerful electro-magnet. #whitedwarfs
     Reply
    FrankenPC was starred FrankenPC was unstarred
    Image of FrankenPC FrankenPC
    11/13/09

    @Indigen: Oh, what happens on the surface of a white dwarf? If you are made of normal atomic particles all of your atomic structures will be torn apart and reduced to neutrons. You would be crushed into a super thin mass and splattered on the surface of the star.

    A white dwarf is ALMOST a black hole. Just not enough initial mass to ignite the space folding. #whitedwarfs
     Reply
    FrankenPC was starred FrankenPC was unstarred
    Image of Strakus Strakus
    11/13/09

    @FrankenPC: Well, sort of. A white dwarf is any stellar remnant no longer fusing and supported by electron degeneracy pressure. If they accumulate enough mass, (1.4 solar masses) they don't collapse, they undergo sudden ignition of carbon fusion and explode as Type 1a supernova. Between 1.4 and 3.0 solar masses, for the remnant (so larger than 97% of stars) you get neutron stars supported by fermion degeneracy pressure, and somewhere higher than that one gets black holes (assuming that quark stars do not exist, which is an open question.) #whitedwarfs
     Reply
    FrankenPC promoted this comment Strakus was starred Strakus was unstarred
    Image of FrankenPC FrankenPC
    11/13/09

    @Strakus: Quark stars??? That's something I've never heard of. Wouldn't the compression energy required be more than enough to form a black hole? (FYI: You're talking to a moran here...). #whitedwarfs
     Reply
    FrankenPC was starred FrankenPC was unstarred
    Image of Strakus Strakus
    11/13/09

    @FrankenPC: Not a problem :-) It's not a matter of compression energy per se, it's just a matter of density and the forces that serve to arrest increases in said density. Really, the only thing important about a black hole is its density- take any mass and you can compute the Schwarzschild radius, or how small a sphere you would have to compact it into before no events at the surface can have a causal effect outside the radius.

    The deal is we don't really know a whole lot about what matter does under really extreme pressure. Squeeze it enough, and it turns into electron degenerate matter, like a white dwarf. Squeeze it more, it undergoes reverse beta decay (the electrons and protons form neutrons, and thus there is no electron degeneracy pressure to prop it up) and it compacts down until it is propped up by neutron degeneracy pressure- roughly, the neutrons running into each other. At the density of neutron star matter, at about 3 solar masses, the star should exceed its radius and form a black hole. There is a window in there, however, where before we reach that size, the star might undergoes another degenerate pressure shift, the neutron disassociating into quarks. The end result is that there is some evidence that a number of objects we believe are neutron stars are in fact quark stars- theory says they should look pretty similar, but there are a number of neutron stars that are denser than they should be and might be made of quark matter. #whitedwarfs
     Reply
    Strakus was starred Strakus was unstarred
    Image of FrankenPC FrankenPC
    11/13/09

    @Strakus: So, in theory, a collapse of a sun could simulate what happens in a particle collider. But, on a large enough scale to create a massive body that would retain all those free quarks due to their combined gravity??? #whitedwarfs
     Reply
    FrankenPC was starred FrankenPC was unstarred
    Image of Bootknife-Jackson Bootknife-Jackson
    11/13/09

    @FrankenPC: check, and check! okay, i'm good to go! #whitedwarfs
     Reply
    Bootknife-Jackson was starred Bootknife-Jackson was unstarred
    Image of Strakus Strakus
    11/13/09

    @FrankenPC: Yeah, if ya want to put it like that. You can just think of degenerate matter as a fluid kept above its vapor pressure- a monoatomic carbon fluid for a white dwarf, a neutron fluid for a neutron star (or one big atomic nucleus, if you prefer) or a big drop quark fluid. It's just the next state of matter on the list as the pressure increases, and it seems conceivable, indeed probable, that it occurs as one climbs up the stellar remnant mass scale between neutron stars and black holes. #whitedwarfs
     Reply
    Strakus was starred Strakus was unstarred
    Image of FrankenPC FrankenPC
    11/14/09

    @Strakus: What a fantastic universe. The mind reels! #whitedwarfs
     Reply
    FrankenPC was starred FrankenPC was unstarred
    Image of gorehound gorehound
    11/12/09

    In reply to When We Reach Pluto, The Adventure Will Just Be Beginning
    boy is it ever cold today on pluto. #space
     Reply
    gorehound was starred gorehound was unstarred
    Image of J_Frank_Parnell J_Frank_Parnell
    11/12/09

    In reply to When We Reach Pluto, The Adventure Will Just Be Beginning

      #space
     Reply
    J_Frank_Parnell was starred J_Frank_Parnell was unstarred
    Image of jabber jabber
    11/12/09

    @J_Frank_Parnell: See if Pluto a dog then what the f is Goofy?? #space
     Reply
    Bootknife-Jackson promoted this comment jabber was starred jabber was unstarred
    Image of FrankenPC FrankenPC
    11/12/09

    In reply to When We Reach Pluto, The Adventure Will Just Be Beginning
    I wonder how long it takes to transmit data from Pluto to Earth? #space
     Reply
    FrankenPC was starred FrankenPC was unstarred
    Image of goldfarb goldfarb
    11/12/09

    @FrankenPC: 30-50AUs between them (pluto's orbit is weird)...light speed is ~7.20 AH/h = 216-360 hours
    or between 9 and 15 days one way...not sure what the distance is at the moment... #space
     Reply
    goldfarb was starred goldfarb was unstarred
    Image of Daveinva Daveinva
    11/12/09

    @FrankenPC: From the Sun, light takes 4 to 7 hours to get there, roughly, depending on how far out it is.

    From Earth, figure it's about the same (as we're only 8 light-minutes away... THAT'S how far away Pluto is, folks). #space
     Reply
    Daveinva was starred Daveinva was unstarred
    Image of Citizen Kang Citizen Kang
    11/12/09

    @goldfarb:

    Ummm...your math makes no sense unless I'm reading it completely wrong. At 7.2 AUs per hour and the distance being 30-50 AUs, isn't it more like 4-7 hours? Where does 9 and 15 days one way come into play? If I'm totally screwing this up, let me know, but, otherwise, your math seems really wrong. #space
     Reply
    goldfarb promoted this comment Citizen Kang was starred Citizen Kang was unstarred
    Image of goldfarb goldfarb
    11/12/09

    @Citizen Kang: HAHAHAHA!...
    opps...
    you're right...I'm doing like 10 things here at work...silly me...silly copy/paste...silly work...I'm going home. #space
     Reply
    goldfarb was starred goldfarb was unstarred
    Image of KhaiJB KhaiJB
    11/12/09

    @Citizen Kang: you add time for being on hold, navigating NASA's phone tree and for getting the Operator to accept the charges... #space
     Reply
    KhaiJB was starred KhaiJB was unstarred
    Image of Guang Guang
    11/12/09

    @KhaiJB: getting the operator to believe where you're calling from/to might also take some time/effort #space
     Reply
    Bootknife-Jackson promoted this comment Guang was starred Guang was unstarred
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