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JCC The All-New, All-Different JCC Astronomy Thread

Discussion in 'Community' started by jp-30, Jul 16, 2010.

  1. Lowbacca_1977

    Lowbacca_1977 Jedi Master star 6

    Registered:
    Jun 28, 2006
    Simplest way to tell if you're seeing the moons is that they should all be in a row, and close to Jupiter. You won't have just background stars that close to Jupiter and all forming a line that passes through Jupiter.
     
  2. Ghost

    Ghost Chosen One star 7

    Registered:
    Oct 13, 2003
    Isn't it supposed to be most visible on Sunday?
     
  3. Ghost

    Ghost Chosen One star 7

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    Oct 13, 2003
  4. VadersLaMent

    VadersLaMent Chosen One star 10

    Registered:
    Apr 3, 2002
    That is an underrated headline. It is a realization that the galaxy may be teeming with life. In the case of Mars however, it has been blasted with UV from the Sun for untold eons.
     
  5. Ghost

    Ghost Chosen One star 7

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    Oct 13, 2003
    Just makes you wonder where it all is, then...
     
  6. VadersLaMent

    VadersLaMent Chosen One star 10

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    Apr 3, 2002
    I should say that teaming with life and teaming with life capable of communication with us and traveling about the galaxy are two different things though the former gives possibility to the latter.
     
  7. Ghost

    Ghost Chosen One star 7

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    Oct 13, 2003
    If it's likely to be possible in multiple worlds within a solar system, then the chances of an intelligent sentient species in our area of the Milky Way should be really high.
     
  8. VadersLaMent

    VadersLaMent Chosen One star 10

    Registered:
    Apr 3, 2002
    Newly discovered solar system 6.5 ly away

    “The distance to this brown dwarf pair is 6.5 light years — so close that Earth’s television transmissions from 2006 are now arriving there,” Luhman said. “It will be an excellent hunting ground for planets because it is very close to Earth, which makes it a lot easier to see any planets orbiting either of the brown dwarfs.”

    Correct me if I'm wrong but tv transmissions are ominidriectional and could only be detected out to half a ly. Radar could be detected much further, as would laser, but not tv and radio transmissions as they are not beamed.
     
  9. VadersLaMent

    VadersLaMent Chosen One star 10

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    Apr 3, 2002
  10. VadersLaMent

    VadersLaMent Chosen One star 10

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    Apr 3, 2002
  11. Placeholder

    Placeholder Jedi Knight star 4

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    Jan 30, 2013
  12. Arawn_Fenn

    Arawn_Fenn Force Ghost star 7

    Registered:
    Jul 2, 2004
    If there is life there, I feel sorry for them.
     
  13. VadersLaMent

    VadersLaMent Chosen One star 10

    Registered:
    Apr 3, 2002
    Oh, is that from the article? Our TV transmissions are not there unless we beamed them there. Recall that scene in Contact where they got our first broadcasts and it was Hitler? Well at 1200 ly you would need like a solar system sized listening dish. Arcebo? At best 2 ly to pick up emissions similar to our own. Radar is detectable for hundreds of ly.
     
  14. Lowbacca_1977

    Lowbacca_1977 Jedi Master star 6

    Registered:
    Jun 28, 2006
    They're still there. Whether or not they're detectable at sufficient signal to noise is different.
     
  15. VadersLaMent

    VadersLaMent Chosen One star 10

    Registered:
    Apr 3, 2002
    I understand.

    More Kepler stuff

    Two small super-Earths in the habitable zone make for understandable excitement. Modeling at the Harvard-Smithsonian Center for Astrophysics (CfA) suggests that both these planets are water worlds, completely covered with a global ocean. Might they have life? Lisa Kaltenegger (Max Planck Institute for Astronomy/CfA) speculates:
    “These planets are unlike anything in our solar system. They have endless oceans. There may be life there, but could it be technology-based like ours? Life on these worlds would be under water with no easy access to metals, to electricity, or fire for metallurgy. Nonetheless, these worlds will still be beautiful blue planets circling an orange star — and maybe life’s inventiveness to get to a technology stage will surprise us.”​
     
  16. Lowbacca_1977

    Lowbacca_1977 Jedi Master star 6

    Registered:
    Jun 28, 2006
    Just to quote the paper: "We do not know if Kepler-62e and -62f have a rocky composition, an atmosphere, or water."
     
  17. VadersLaMent

    VadersLaMent Chosen One star 10

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    Apr 3, 2002
  18. VadersLaMent

    VadersLaMent Chosen One star 10

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    Apr 3, 2002
    NEO coming by soon

    It says nothing about what type of asteroid this is, metallic, stoney, etc.
     
  19. Todd the Jedi

    Todd the Jedi Mod and Soliloquist of SWTV star 6 Staff Member Manager

    Registered:
    Oct 16, 2008
  20. DantheJedi

    DantheJedi Jedi Master star 5

    Registered:
    Aug 23, 2009
    Does this mean we have to watch out for super-werewolves tonight?
     
  21. VadersLaMent

    VadersLaMent Chosen One star 10

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    Apr 3, 2002
  22. yankee8255

    yankee8255 Jedi Grand Master star 6

    Registered:
    May 31, 2005
    What Earth and our Moon look like seen from Saturn, compliments of the Cassini spacecraft

    [​IMG]

    [​IMG]
     
  23. Everton

    Everton Force Ghost star 10

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    Jul 18, 2003
    I think that's one of the best photographs ever taken.
     
    yankee8255 likes this.
  24. VadersLaMent

    VadersLaMent Chosen One star 10

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    Apr 3, 2002
    It's another 'Pale Blue Dot' moment. I love it.
     
  25. VadersLaMent

    VadersLaMent Chosen One star 10

    Registered:
    Apr 3, 2002
    [​IMG]

    That's Mimas with Pandora below it. The 'Death Star' crater is a bit over 80 miles across with walls 3 miles high. It orbits about 185,000 miles from Saturn. Pandora is about 140,000 miles from Saturn and has a 60 mile or so diameter.