阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。
If you're on a dark countryside hill some night,
{#blank#}1{#/blank#} (look) up at the sky. A
band (束) of light may appear that looks like milk spilled (洒落) across the sky. The ancient Romans called the band via lacteal
which means "milky road" {#blank#}2{#/blank#} "milky way."
The band of light that
you see isn't actually milk, of course—it's a galaxy (星系). A galaxy can contain many millions of stars held together by
the force of gravity. Our solar system, {#blank#}3{#/blank#} includes the sun. Earth, and other planets, is part of this
galaxy called the Milky Way.
The Milky Way {#blank#}4{#/blank#} (make) up of hundreds of billions of stars like our sun. And like
our sun, most of these {#blank#}5{#/blank#} (star) have at least one
planet moving around {#blank#}6{#/blank#} (they). Earth is located
about halfway between the center of the Milky Way and its outer edge.
At the center of the
Milky Way is one of the {#blank#}7{#/blank#} (strange) and deadliest
things in the universe: a black hole. {#blank#}8{#/blank#} (scientist) believe a
black hole lies at the center of most galaxies. The Milky Way's black hole is
called Sagittarius A*. Its gravity is {#blank#}9{#/blank#} strong that it pulls in
anything that gets too close including stars. So we're {#blank#}10{#/blank#} (luck) that Earth is located far away from the center!