Have you ever looked up at the night sky and noticed a band of stars that have a whitish “cloud” around them? If you have, you were looking at a portion of our own galaxy, the Milky Way. It is called “milky” because of this whitish cloud that the stars live in. This cloud is actually light that the stars give off.
People who lived many centuries ago didn’t know what they were seeing when they looked at the Milky Way in the sky. Some thought it was a bridge, some thought it was a river, and others thought it was a pathway for spirits of the dead. Today, the Milky Way is much less mysterious. We know more about our galaxy now than ever before. Scientists and astronomers continue to study it and learn more about it.
What is a galaxy? It is a system of millions to hundreds of billions of stars. Our galaxy, the Milky Way, contains about one trillion, or 1, 000, 000, 000, 000, stars. It is hard to imagine a “trillion” stars, isn’t it?
There are hundreds of billions of galaxies in the universe. How does a galaxy relate to the universe? A galaxy is part of the universe. The universe includes all galaxies.
When you look at the Milky Way at night, the stars you can see are the brightest stars. Some people use a telescope to see more stars, or the stars that are not as bright. It is easiest to see the Milky Way if you live in the country. That is because the light from cities can make it harder to see the light from the stars in a dark sky.
The Milky Way has a pancake shape, and the Earth is located somewhere near the center of this “pancake”. When you look at the Milky Way at night, you are seeing just a portion of the galaxy. This portion appears in a different place in the sky depending on the time of year. It is higher in the sky during the summer and winter. But during the spring and fall, it is lower, and closer to the horizon.
Have you ever looked up at the night sky and noticed a band of
stars
that have a whitish “cloud” around them? If you have, you were looking at a portion of our
own
galaxy, the
Milky
Way. It
is called
“milky”
because of this
whitish cloud that the
stars
live
in. This cloud is actually light that the
stars
give off.
People
who
lived
many
centuries ago didn’t know what they were seeing when they looked at the
Milky
Way in the sky.
Some
thought
it was a bridge,
some
thought
it was a river,
and others
thought
it was a pathway for spirits of the dead.
Today
, the
Milky
Way is much less mysterious. We know more about our galaxy
now
than ever
before
. Scientists and astronomers continue to study it and learn more about it.
What is a galaxy? It is a system of millions to hundreds of billions of
stars
. Our galaxy, the
Milky
Way, contains about one trillion, or 1, 000, 000, 000, 000,
stars
. It is
hard
to imagine a “trillion”
stars
, isn’t it?
There are hundreds of billions of galaxies in the universe. How does a galaxy relate to the universe? A galaxy is part of the universe. The universe includes all galaxies.
When you look at the
Milky
Way at night, the
stars
you can
see
are the brightest
stars
.
Some
people
use
a telescope to
see
more
stars
, or the
stars
that are not as bright. It is easiest to
see
the
Milky
Way if you
live
in the country.
That is
because
the light from cities can
make
it harder to
see
the light from the
stars
in a dark sky.
The
Milky
Way has a pancake shape, and the Earth
is located
somewhere near the center of this “pancake”. When you look at the
Milky
Way at night, you are seeing
just
a portion of the galaxy. This portion appears in a
different
place in the sky depending on the time of year. It is higher in the sky during the summer and winter.
But
during the spring and fall, it is lower, and closer to the horizon.