A presentation by Jessica Booth

1
Our sunthe star

• A presentation by Jessica Booth

2
The suns formation

• The sun is a second generation star that
  partially formed from the remnants of a first
  generation star.
• The first generation star it formed from
  completed its life then expired with a supernova
  explosion in which its materials were thrown
  outwards.

• The supernova explosion of this star caused the
  nebula (cloud of dust and gas) that the sun
  formed from to begin gravitational contraction.

3
The suns formation

• 5 billion years ago when the sun's formation
  began all that existed of our solar system was
  the solar nebula.

• The solar nebula was slowly spinning when
  gravitational effects from within the cloud began
  to dominate over its heat causing it to condense
  and a protostar was formed.

4
The suns formation

• During the following tens of millions of years
  the protostar heated to point that allowed
  nuclear processes to occur at the core, then sun
  became a main sequence star.

5
Life of the sunso far

• The sun went through an unstable period in which
  it developed very strong solar winds blowing the
  volatile gases out of the inner solar system
  before they could condense, which is why the
  first four planets in our solar system are solid.
• Is now a middle-aged main sequence star that has
  been steadily burning through its reserves of
  hydrogen fuel for about 5 billion years.