Stars and Galaxies
The universe is made up of
stars and galaxies.
SECTION 1
Stars
Main Idea For many years,
people have been learning
about stars by observing
their locations in the sky
and by studying their light.
SECTION 2
The Sun
Main Idea The Sun is an
enormous ball of gas which
produces energy by fusing
hydrogen into helium.
SECTION 3
Evolution of Stars
Main Idea Stars pass
through several stages as
they evolve.
SECTION 4
Galaxies and the Universe
Main Idea By studying
galaxies, scientists have
observed that the
universe is expanding.
What’s your address?
You know your address at home. You also know your address at
school. But do you know your address in space? You live on a planet
called Earth that revolves around a star called the Sun. Earth and
the Sun are part of a galaxy called the Milky Way. It looks similar to
galaxy M83, shown in the photo.
Science Journal
on this page.
368
TSADO/ ESO/ Tom Stack & Assoc.
Write a description in your Science Journal of the galaxy shown