Path of totality
What Is a Solar Eclipse?

Sometimes when the moon orbits Earth, it moves
between the sun and Earth. When this happens,
the moon blocks the light of the sun from
reaching Earth. This causes an eclipse of the
sun, or solar eclipse. During a solar eclipse, the
moon casts a shadow onto Earth.

There are three types of solar eclipses.

The first is a total solar eclipse. A total solar
eclipse is only visible from a small area on Earth.
The people who see the total eclipse are in the
center of the moon’s shadow when it hits Earth.
The sky becomes very dark, as if it were night.
For a total eclipse to take place, the sun, moon
and Earth must be in a direct line.

The second type of solar eclipse is a partial solar
eclipse. This happens when the sun, moon and
Earth are not exactly lined up. The sun appears
to have a dark shadow on only a small part of its
The third type is an annular (ANN you ler) solar eclipse. An annular eclipse happens when the moon is farthest from Earth.
Because the moon is farther away from Earth, it seems smaller. It does not block the entire view of the sun. The moon in front of
the sun looks like a dark disk on top of a larger sun-colored disk. This creates what looks like a ring around the moon.

During a solar eclipse, the moon casts two shadows on Earth. The first shadow is called the umbra (UM bruh). This shadow gets
smaller as it reaches Earth. It is the dark center of the moon’s shadow. The second shadow is called the penumbra (pe NUM
bruh). The penumbra gets larger as it reaches Earth. People standing in the penumbra will see a partial eclipse. People standing
in the umbra will see a total eclipse.

Solar eclipses happen once every 18 months. Unlike lunar eclipses, solar eclipses only last for a few minutes.

NEVER look directly at the sun: It can permanently damage your eyes! You must use proper safety equipment to look at any type
of solar eclipse.