Astronomy, Exobiology, & Cosmology

amateur astronomy, astrophysics, exoscience

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  1. TruthSeeker

    Intergalactic Method of Transportation?

    TruthSeeker, Sep 30, 2010 ... 2 3
    Replies:
    50
    Views:
    4,914
    Skeptical
    Oct 21, 2010
  2. hansda
    Redirect

    Universe Expansion

    hansda, Aug 24, 2017 ... 6 7 8
    Replies:
    –
    Views:
    –
    N/A
  3. blobrana

    Mysterious hole in pond

    blobrana, Jan 20, 2008 ... 2
    Replies:
    20
    Views:
    4,949
    cosmictraveler
    Jan 22, 2008
  4. pluto2

    The Wow! signal from 1977

    pluto2, May 25, 2012 ... 2
    Replies:
    36
    Views:
    4,952
    Cyperium
    Jul 18, 2013
  5. Goldtop

    What's Space?

    Goldtop, Aug 3, 2018 ... 2 3 4
    Replies:
    62
    Views:
    4,955
    Seattle
    Aug 8, 2018
  6. Lady

    Black circle around moon?

    Lady, Oct 29, 2002 ... 2 3
    Replies:
    54
    Views:
    4,957
    Boris2
    Nov 11, 2002
  7. paddoboy

    Does Time ever run backwards: Perhaps.

    paddoboy, Sep 3, 2015 ... 3 4 5
    Replies:
    93
    Views:
    4,959
    paddoboy
    Sep 11, 2015
  8. StrangerInAStrangeLand

    Geocentric Belief

    StrangerInAStrangeLand, Jul 15, 2015 ... 2 3 4
    Replies:
    64
    Views:
    4,967
    paddoboy
    Jul 31, 2015
  9. kaneda

    Tired light

    kaneda, Nov 5, 2007 ... 3 4 5
    Replies:
    97
    Views:
    4,976
    kaneda
    Nov 18, 2007
  10. paddoboy

    Meet Laniakea, Our Home Supercluster:

    paddoboy, Sep 4, 2014 ... 2
    Replies:
    22
    Views:
    4,984
    paddoboy
    Sep 8, 2014
  11. darksidZz

    Do Photons Have Mass - Yes or No?

    darksidZz, May 11, 2007 ... 3 4 5
    Replies:
    86
    Views:
    5,005
    1100f
    May 15, 2007
  12. cosmictraveler

    We shouldn't send humans to Mars or the Moon.

    cosmictraveler, Dec 22, 2007 ... 2 3
    Replies:
    51
    Views:
    5,009
    kaneda
    Dec 28, 2007
  13. ael65

    pulse-ram-scram jet single stage to orbit ?

    ael65, Nov 26, 2007 ... 2
    Replies:
    39
    Views:
    5,015
    Billy T
    Dec 2, 2007
  14. Xelasnave.1947

    Inflation and big bang theory

    Xelasnave.1947, Nov 6, 2016 ... 4 5 6
    Replies:
    101
    Views:
    5,032
    Write4U
    Nov 17, 2016
  15. jumpercable

    Back To The Moon In 2020?

    jumpercable, Dec 5, 2006 ... 3 4 5
    Replies:
    95
    Views:
    5,045
    draqon
    Dec 16, 2006
  16. John J. Bannan

    Which direction are we traveling in space?

    John J. Bannan, Jul 6, 2007 ... 2 3 4
    Replies:
    63
    Views:
    5,047
    Montec
    Aug 2, 2007
  17. Quantum Quack

    What keeps the Stars apart?

    Quantum Quack, Feb 3, 2008 ... 2 3
    Replies:
    45
    Views:
    5,051
    Quantic
    Feb 6, 2008
  18. darksidZz

    Can humans return to earth after living on Mars for extended period?

    darksidZz, May 29, 2013 ... 2
    Replies:
    21
    Views:
    5,064
    Read-Only
    Jun 2, 2013
  19. Godless

    Are we the only intelegent beings in the universe?

    Godless, Sep 3, 2001 ... 2 3
    Replies:
    51
    Views:
    5,065
    wet1
    Nov 17, 2001
  20. kingwinner

    The position of the earth during summer solstice?

    kingwinner, Sep 20, 2005
    Replies:
    7
    Views:
    5,070
    Lucas
    Oct 2, 2005
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