Tomorrows Universe

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A new view of the Universe X
Fred Watson, AAO
April 2005
The discovery of life
        Mars Dust Storm
June 26, 2001    September 4, 2001
The surface of Mars…   Columbia Hills
Gusev crater basalt (Spirit Rover)
Mounting evidence for
subterranean ice and
surface water flows in
the past million years




                         ESA want to
                         drill into the
                         permafrost…
Mysterious Phobos…   Comet Wild-2
Aurorae on Saturn (HST + Cassini)…
Cassini images - Dione…   Mimas…   Titan
Amazing Iapetus…
  Huygens
touchdown
  on Titan
Planet detection with OWL
        Star image from
        OWL with extreme
        adaptive optics
        correction
       OWL can detect
       Earth to 75 l.y.
       Biomarkers on
       Earth to about
       45 l.y.

           0.5”
    ELT terrestrial planet studies –
            are we alone?
• To study exo-earths, need:           Saturn Analogue:
    • large sample (~1000              With rings
    stars)
                                       Without rings
    • to reach ~30pc
    •resolution (~33mas)
    •Suppression ~1010
    •>50m
• Want to obtain:
   • SPECTROSCOPY
   • O2, H2O
   • Orbits
   • Whole systems

                          Dyudina et al, 2004 (Australian National University)
What is dark energy?
   Power spectrum wiggles…




Characteristic separations are 180º/l
Position of first peak yields cosmic energy density
Current Model:
       Origin of
   the Universe



                                                    The
                                                    Universe
                                                    today




Defining quantities:   Hubble constant, H0 (current expansion)
                       cosmic density of all matter, m
                       cosmic density of ordinary matter, b
                       dark energy  (cosmological constant, )
                       (evidence from distant supernovae, etc.)
Compare with the power spectrum of the 2dF survey to
      see its evolution and obtain M +  (1)
  To determine the characteristics of
the Dark Energy (cosmological constant
or dynamic vacuum energy?), we need to
 examine the power spectrum at higher
     redshifts – hence AAOmega…
And what about cosmic
      strings…?
We perceive the Universe in 4
       dimensions…
But there are problems because
of the conflict between general
 relativity and quantum theory…

 There can’t be a singularity at
  the instant of the Big Bang…

This (and other considerations)
 have led to the idea of cosmic
         strings occupying a 10-
             dimensional space…
The possibility
of multiple
universes…



   Look here, this
Universe you sold me…
   It’s expanding.
The Multiverse
The ekpyrotic
theory…
Some useful websites:

AAO: www.aao.gov.au
RAVE: www.rave-survey.aip.de/rave/
Cosmological constant:
     pancake.uchicago.edu/~carroll/encyc/
History of mathematics:
     www-gap.dcs.st-and.ac.uk/~history/index.html
NASA home: www.nasa.gov
WMAP: map.gsfc.nasa.gov
What’s in the sky? www.heavens-above.com
Dark skies: www.darksky.org
Science news: news.bbc.co.uk/1/hi/sci/tech
Fred Watson’s home page:
     www.aao.gov.au/local/www/fgw/

				
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