a solar eclipse happens when a new moon moves between the Earth and the Sun
moves between the Earth and the Sun
moves between the Earth and the Sun blocking some or all of the sun’s rays
blocking some or all of the sun’s rays
blocking some or all of the sun’s rays from reaching the earth by cosmic chance
from reaching the earth by cosmic chance
from reaching the earth by cosmic chance even though the Sun is 400 times wider
even though the Sun is 400 times wider
even though the Sun is 400 times wider than the moon it’s also 400 times
than the moon it’s also 400 times
than the moon it’s also 400 times farther away therefore the two objects
farther away therefore the two objects
farther away therefore the two objects appear the same size in our sky
astronomers are able to predict eclipses
astronomers are able to predict eclipses because the Earth and Moon have very
because the Earth and Moon have very
because the Earth and Moon have very predictable orbits why then isn’t there
predictable orbits why then isn’t there
predictable orbits why then isn’t there an eclipse every month the moon’s orbit
an eclipse every month the moon’s orbit
an eclipse every month the moon’s orbit is usually tilted a few degrees north or
is usually tilted a few degrees north or
is usually tilted a few degrees north or south in relation to the earth when the
south in relation to the earth when the
south in relation to the earth when the moon does eclipse the Sun it casts two
moon does eclipse the Sun it casts two
moon does eclipse the Sun it casts two types of shadows on earth a smaller
types of shadows on earth a smaller
types of shadows on earth a smaller darker shadow known as the Umbra and a
darker shadow known as the Umbra and a
darker shadow known as the Umbra and a larger shadow known as the penumbra
there are four types of solar eclipses
there are four types of solar eclipses the first and most spectacular is a
the first and most spectacular is a
the first and most spectacular is a total eclipse when the moon completely
total eclipse when the moon completely
total eclipse when the moon completely covers the sun’s surface a total eclipse
covers the sun’s surface a total eclipse
covers the sun’s surface a total eclipse can only be seen if you’re standing
can only be seen if you’re standing
can only be seen if you’re standing within the umbral shadow that’s why the
within the umbral shadow that’s why the
within the umbral shadow that’s why the imaginary line created by this shadow as
imaginary line created by this shadow as
imaginary line created by this shadow as it races across Earth is known as the
it races across Earth is known as the
it races across Earth is known as the path of totality people within the
path of totality people within the
path of totality people within the penumbral shadow see only a partial
penumbral shadow see only a partial
penumbral shadow see only a partial eclipse the second type from this view
eclipse the second type from this view
eclipse the second type from this view outside the path of totality the moon
outside the path of totality the moon
outside the path of totality the moon passes in front of the Sun off-center
passes in front of the Sun off-center
passes in front of the Sun off-center never fully covering its surface third
never fully covering its surface third
never fully covering its surface third an annular eclipse occurs when the moon
an annular eclipse occurs when the moon
an annular eclipse occurs when the moon passes directly in front of the Sun
passes directly in front of the Sun
passes directly in front of the Sun however unlike a total eclipse the moon
however unlike a total eclipse the moon
however unlike a total eclipse the moon appears too small to fully cover the Sun
appears too small to fully cover the Sun
appears too small to fully cover the Sun the moon’s orbit is elliptical so
the moon’s orbit is elliptical so
the moon’s orbit is elliptical so sometimes it’s closer to Earth and
sometimes it’s closer to Earth and
sometimes it’s closer to Earth and sometimes it’s farther away last a
sometimes it’s farther away last a
sometimes it’s farther away last a hybrid eclipse is when the moon’s
hybrid eclipse is when the moon’s
hybrid eclipse is when the moon’s position between the Earth and Sun is so
position between the Earth and Sun is so
position between the Earth and Sun is so finely balanced that the curvature of
finely balanced that the curvature of
finely balanced that the curvature of the earth plays a role
the earth plays a role
the earth plays a role the moon will be farther away from some
the moon will be farther away from some
the moon will be farther away from some parts of earth along the eclipses path
parts of earth along the eclipses path
parts of earth along the eclipses path resulting in an annular eclipse in other
resulting in an annular eclipse in other
resulting in an annular eclipse in other parts the moon will be just close enough
parts the moon will be just close enough
parts the moon will be just close enough to fully cover the Sun resulting in a
to fully cover the Sun resulting in a
to fully cover the Sun resulting in a total eclipse while a total solar
total eclipse while a total solar
total eclipse while a total solar eclipse happens somewhere on earth every
eclipse happens somewhere on earth every
eclipse happens somewhere on earth every year or two any given point on earth
year or two any given point on earth
year or two any given point on earth experiences the event only about once
experiences the event only about once
experiences the event only about once every 400 years we interrupt this video
every 400 years we interrupt this video
every 400 years we interrupt this video for an important safety announcement
for an important safety announcement
for an important safety announcement looking directly at the Sun even during
looking directly at the Sun even during
looking directly at the Sun even during an eclipse can cause permanent eye
an eclipse can cause permanent eye
an eclipse can cause permanent eye damage fortunately there are ways to
damage fortunately there are ways to
damage fortunately there are ways to enjoy an eclipse safely the easiest is
enjoy an eclipse safely the easiest is
enjoy an eclipse safely the easiest is to use certified eclipse watching
to use certified eclipse watching
to use certified eclipse watching glasses which are shaded thousands of
glasses which are shaded thousands of
glasses which are shaded thousands of times darker than typical sunglasses you
times darker than typical sunglasses you
times darker than typical sunglasses you can also look at the Eclipse indirectly
can also look at the Eclipse indirectly
can also look at the Eclipse indirectly by making a pinhole viewer simply poke a
by making a pinhole viewer simply poke a
by making a pinhole viewer simply poke a small hole in a piece of cardboard hold
small hole in a piece of cardboard hold
small hole in a piece of cardboard hold the cardboard up to the Sun allowing the
the cardboard up to the Sun allowing the
the cardboard up to the Sun allowing the sun’s image to be projected onto a flat
sun’s image to be projected onto a flat
sun’s image to be projected onto a flat surface be sure to look only at the
surface be sure to look only at the
surface be sure to look only at the surface and not through the cardboard
surface and not through the cardboard
surface and not through the cardboard just before the moon completely covers
just before the moon completely covers
just before the moon completely covers the Sun low-lying valleys on the moon’s
the Sun low-lying valleys on the moon’s
the Sun low-lying valleys on the moon’s edge will be the only spots that
edge will be the only spots that
edge will be the only spots that sunlight continues to pass through these
sunlight continues to pass through these
sunlight continues to pass through these remaining brilliant shafts of light
remaining brilliant shafts of light
remaining brilliant shafts of light known as Baily’s beads will disappear
known as Baily’s beads will disappear
known as Baily’s beads will disappear one after another and finally a single
one after another and finally a single
one after another and finally a single bead of light remains known as the
bead of light remains known as the
bead of light remains known as the diamond ring signaling that you’re just
diamond ring signaling that you’re just
diamond ring signaling that you’re just seconds away from experiencing totality
seconds away from experiencing totality
seconds away from experiencing totality once the last bead disappears and the
once the last bead disappears and the
once the last bead disappears and the moon completely covers the sun’s surface
moon completely covers the sun’s surface
moon completely covers the sun’s surface the view through your Eclipse glasses
the view through your Eclipse glasses
the view through your Eclipse glasses will be pitch-black totality achieved
will be pitch-black totality achieved
will be pitch-black totality achieved at this point none of the sun’s rays are
at this point none of the sun’s rays are
at this point none of the sun’s rays are reaching your eyes and it’s the only
reaching your eyes and it’s the only
reaching your eyes and it’s the only time that it’s safe to take off your
time that it’s safe to take off your
time that it’s safe to take off your glasses remember to put your Eclipse
glasses remember to put your Eclipse
glasses remember to put your Eclipse glasses back on before any of the sun’s
glasses back on before any of the sun’s
glasses back on before any of the sun’s rays start to peek through again any
rays start to peek through again any
rays start to peek through again any sunlight reaching your eyes even for a
sunlight reaching your eyes even for a
sunlight reaching your eyes even for a few seconds can cause serious damage
few seconds can cause serious damage
few seconds can cause serious damage while an eclipse can last a few hours
while an eclipse can last a few hours
while an eclipse can last a few hours totality typically occurs for less than
totality typically occurs for less than
totality typically occurs for less than three minutes animals and plants have
three minutes animals and plants have
three minutes animals and plants have also been known to alter their behavior
also been known to alter their behavior
also been known to alter their behavior during a total eclipse songbirds may
during a total eclipse songbirds may
during a total eclipse songbirds may stop singing crickets may start chirping
stop singing crickets may start chirping
stop singing crickets may start chirping and flowers may even start to close up
and flowers may even start to close up
and flowers may even start to close up we won’t always be able to see total
we won’t always be able to see total
we won’t always be able to see total solar eclipses the moon moves about
solar eclipses the moon moves about
solar eclipses the moon moves about one-and-a-half inches away from Earth
one-and-a-half inches away from Earth
one-and-a-half inches away from Earth each year it’s estimated that in about a
each year it’s estimated that in about a
each year it’s estimated that in about a billion years the moon will be too far
billion years the moon will be too far
billion years the moon will be too far away from Earth to completely cover the
away from Earth to completely cover the
away from Earth to completely cover the Sun
Sun
Sun [Music]
”
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