Transcript The Earth and the Stars

The Earth and the
Stars
Presented by:
Paula Follett-Comeau
What are stars made of?
• Stars are mostly hot gases such as
hydrogen
• Hydrogen gas consists of tiny bits
called atoms
• The heat inside the star makes the
atoms jump about.
• The collisions between the atoms
produce flashes of light and bursts
of heat
How many stars can you
see on a dark, clear night?
• 3,000 with your
eyes alone
• as many as
600,000 with a
small telescope!
• There are at
least 200 billion,
billion stars out
in space!
Which star is closest to
the Earth?
• The Sun
• it is about 149
million km from
us
• it is the only
star in our solar
system
How hot is the sun?
• Hotter than
anything on
Earth!
• It’s surface is
about 5,532C
• The inside of
the sun is about
13 million C!
Which is bigger, the sun
or the Earth?
• The sun is bigger, by far
• it is about 1,384,000 km across;
over 100 times the diameter of
Earth!
• The sun is so huge that more
than 1 million Earths could
easily fit inside it!
What are planets?
• A planet is a
large celestial
body that orbits
a star and does
not shine on its
own.
• There are 9
planets in our
solar system
Do the planets move?
• Planets move
around the sun
in an orbit.
• Each planet also
spins on its axis.
• The planets are
moving through
the galaxy with
the sun.
How fast is the Earth
moving?
• Earth revolves around
the sun at a speed of
106,560km an hour!
• Earth also rotates-taking 24 hours to
make one complete
turn.
• Not all points on Earth
move at the same
speed--North Pole
spins slowly; around
the equator speeds at
1,661 km an hour!
Would you like to learn
more about astronomy?
• Visit the
Internet Space
Station for lots
of learning,
games, and fun!