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SUMMARY:Dark Matter and Dark Energy - the hunt for the missing 95 per cent
  - Brian Clegg
DTSTART:20191015T183000Z
DTEND:20191015T200000Z
UID:TALK131389@talks.cam.ac.uk
CONTACT:Oliver Normand
DESCRIPTION:Come along to the first CUAS talk of the year to hear from Bri
 an Clegg – an award-winning British science writer and public speaker!\n
 \nAs our first talk of the year\, entry is FREE for all. Annual membership
  (£7) and life membership (£12) can also be purchased at the event – p
 lease bring cash.\n\nThe talk will be followed by refreshments outside the
  lecture theatre.\n\nPlease note that the Bristol Myers-Squibb Lecture The
 atre (Department of Chemistry) is not our usual venue and is situated at t
 he other end of the building from the Wolfson Lecture Theatre (and may not
  be accessed from the main entrance). Please enter via the entrance opposi
 te Scott Polar Research Institute (indicated by the red arrow on the map h
 ere: https://map.cam.ac.uk/Bristol-Myers+Squibb+Lecture+Theatre). The Depa
 rtment of Chemistry is on Lensfield Road.\n\nAll the matter and light we c
 an see in the universe makes up a trivial 5 per cent of everything. The re
 st is hidden. This could be the biggest puzzle that science has ever faced
 . Since the 1970s\, astronomers have been aware that galaxies have far too
  little matter in them to account for the way they spin around: they shoul
 d fly apart\, but something concealed holds them together. That ’somethi
 ng’ is dark matter – invisible material in five times the quantity of 
 the familiar stuff of stars and planets.\n\nBy the 1990s we also knew that
  the expansion of the universe was accelerating. Something\, named dark en
 ergy\, is pushing it to expand faster and faster. Across the universe\, th
 is requires enough energy that the equivalent mass would be nearly fourtee
 n times greater than all the visible material in existence.\n\nDespite a w
 hole range of experiments\, dark matter has never been detected: some sugg
 est it may not even exist. Meanwhile\, theories of dark energy have prolif
 erated. It’s a challenge that awaits the next generation of astronomers 
 and astrophysicists.
LOCATION:Bristol Myers-Squibb lecture theatre Department of Chemistry\, Le
 nsfield Rd\, Cambridge\, CB2 1EW
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