Basic facts about the Sun
v
is 93 million miles from Earth
v
is made of 92% Hydrogen, 7% Helium, and 1% other gases
v
is
5
billion years old, another
5
billion to go
v
is a medium-size star, one of about
2 billion
in our galaxy
v
has an 11-year cycle of solar activity
v
The Sun:
