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The Milky Way
Our celestial home is the __________________. It is _________
light years across, and _______ light years deep- it is quite large! It
contains approximately _______ stars. Amazingly, there are many
other galaxies besides the Milky Way. The name “Milky Way” comes
from ___________, who called the white streak across the heavens
a ______ of _______. _________ was the first person to suggest that
the Milky Way is actually made up of millions of distant stars. It
was proven _______ years later when _________ observed this band
of stars through his telescope.
The Milky Way, like all other galaxies, is a complex system of
________, _________, ___________ and other matter, bound together by
________. They are often classified by their _______. The three main
classifications of galaxies are ___________, __________, and
___________. Our galaxy is a ________________. A light year is the
________ light ________ in a _______. Our solar system is a tiny speck,
located on an outer arm of the galaxy called _________________. We
orbit the center of the Milky way, at a rate of_____________ miles
per __________. It would still take us a very long time to complete
one rotation. Scientists use radio ___________, __________ imagery
and physics to observe our galaxy.
Everything in our galaxy orbits a supersized _________________.
It is estimated that the Milky Way is moving through space at a
rate of ___________ miles per _____________, picking up other galaxies
and parts of other galaxies as it goes. Every year, about _______
new stars are formed.