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

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

  1. Lowbacca_1977 Force Ghost

    Member Since:
    Jun 28, 2006
    star 6
    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 Chosen One

    Member Since:
    Oct 13, 2003
    star 6
    Isn't it supposed to be most visible on Sunday?
  3. Ghost Chosen One

    Member Since:
    Oct 13, 2003
    star 6
  4. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
    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 Chosen One

    Member Since:
    Oct 13, 2003
    star 6
    Just makes you wonder where it all is, then...
  6. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
    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 Chosen One

    Member Since:
    Oct 13, 2003
    star 6
    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 Chosen One

    Member Since:
    Apr 3, 2002
    star 9
    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 Chosen One

    Member Since:
    Apr 3, 2002
    star 9
  10. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
  11. Placeholder Force Ghost

    Member Since:
    Jan 30, 2013
    star 4
  12. Arawn_Fenn Chosen One

    Member Since:
    Jul 2, 2004
    star 7
    If there is life there, I feel sorry for them.
  13. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
    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 Force Ghost

    Member Since:
    Jun 28, 2006
    star 6
    They're still there. Whether or not they're detectable at sufficient signal to noise is different.
  15. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
    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 Force Ghost

    Member Since:
    Jun 28, 2006
    star 6
    Just to quote the paper: "We do not know if Kepler-62e and -62f have a rocky composition, an atmosphere, or water."
  17. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
  18. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
    NEO coming by soon

    It says nothing about what type of asteroid this is, metallic, stoney, etc.
  19. Todd the Jedi Mod and Sitcom Dad of SWTV

    Manager
    Member Since:
    Oct 16, 2008
    star 5
  20. DantheJedi Force Ghost

    Member Since:
    Aug 23, 2009
    star 5
    Does this mean we have to watch out for super-werewolves tonight?
  21. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
  22. yankee8255 Force Ghost

    Member Since:
    May 31, 2005
    star 6
    What Earth and our Moon look like seen from Saturn, compliments of the Cassini spacecraft

    [IMG]

    [IMG]
  23. Everton Chosen One

    Member Since:
    Jul 18, 2003
    star 10
    I think that's one of the best photographs ever taken.
    yankee8255 likes this.
  24. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
    It's another 'Pale Blue Dot' moment. I love it.
  25. VadersLaMent Chosen One

    Member Since:
    Apr 3, 2002
    star 9
    [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.