Warm-UpConvert 5.4 lightyears into miles1ly = 6.1012miHow will a
star the size of sun die? Give me the steps in the process.
Times Up!GoalTo analyze the various theories for how the
universe will end and determine which seems the most well supported
by evidence. Fate of the UniverseAge of the UniverseRocks on
Earth4.2 billion yearsOldest stars10-12 billion yearsUniverse must
be olderEstimate backwards13.8 billion years
http://scienceblogs.com/startswithabang/2009/07/31/the-size-of-the-universe-a-har/The
TheoriesThere are 3 major theories for how the universe will end.
The Big CrunchThe Big ChillThe Big RipThe Big Crunch + Dark
MatterThere is enough matter in the universe to slow its
expansiongravity takes over. Gravity will then pull everything back
together into one single point again. Without dark matter, this
theory is not possible. Dark matter
http://sandeepdmisra.wordpress.com/2011/04/The Big ChillAssumes
that there is not enough matter to stop the universes expansion
(gravity isnt strong enough)The galaxies will continue to drift
apart (moving more and more slowly)the stars will use up all of the
universes hydrogen (cant form new stars)Universe will become cold
and dark. Dark EnergyIn the 1990s scientists discovered a new force
in the universe: Dark Energy. Dark energy is the opposite of
gravity. Gravity pulls things together and dark energy pulls things
apart. If the Big Crunch or Big Chill are correct we should see the
expansion of the universe slowing but it appears to be speeding
upThe Big RipAs the universe becomes more spread out dark energy
has more power. This theory states that the universe will expand at
a faster and faster ratedark energy will overpower gravityuniverse
will be pulled apart (even atoms will be pulled to pieces) Runaway
Universe (Start at 3:30ish)
LikelihoodThe Big Crunch (Depends on what Dark Matter does)The
Big Chill (Not super likely at this point)The Big Rip (Depends on
what Dark Energy does)Dark Matter/Dark EnergyDark Matter/Dark
Energy
