Solar Eclipse 101 | National Geographic

Solar Eclipse 101 | National Geographic


– [Narrator] A solar eclipse happens when a new moon moves between
the Earth and the sun, blocking some or all of the sun’s rays from reaching the Earth. By cosmic chance, even though the sun is 400 times wider than the moon, it’s also 400 times farther away. Therefore, the two objects
appear the same size in our sky. Astronomers are able to predict eclipses because the Earth and moon
have very predictable orbits. Why, then, isn’t there
an eclipse every month? The moon’s orbit is usually tilted a few degrees north or south
in relation to the Earth. When the moon does eclipse the sun, it casts two types of shadows on Earth: a smaller, darker shadow,
known as the umbra, and a larger shadow,
known as the penumbra. There are four types of solar eclipses. The first and most spectacular
is a total eclipse, when the moon completely
covers the sun’s surface. A total eclipse can only be seen if you’re standing
within the umbral shadow. That’s why the imaginary
line created by this shadow as it races across Earth is
known as the path of totality. People within the penumbral shadow see only a partial
eclipse, the second type. From this view, outside
the path of totality, the moon passes in front
of the sun off-center, never fully covering its surface. Third, an annular eclipse, occurs when the moon passes
directly in front of the sun. However, unlike a total eclipse, the moon appears too small
to fully cover the sun. The moon’s orbit is elliptical, so sometimes it’s closer to Earth and sometimes it’s farther away. Last, a hybrid eclipse, is
when the moon’s position between the Earth and
sun is so finely balanced that the curvature of
the Earth plays a role. The moon will be farther
away from some parts of Earth along the eclipse’s path,
resulting in an annular eclipse. In other parts, the moon
will be just close enough to fully cover the sun,
resulting in a total eclipse. While a total solar eclipse happens somewhere on Earth every year or two, any given point on Earth
experiences the event only about once every 400 years. (high-pitched hum)
(static crackles) We interrupt this video for an important safety announcement. Looking directly at the sun, even during an eclipse, can
cause permanent eye damage. Fortunately, there are ways
to enjoy an eclipse safely. The easiest is to use certified
eclipse-watching glasses, which are shaded thousands of times darker than typical sunglasses. You can also look at
the eclipse indirectly by making a pinhole viewer. Simply poke a small hole
in a piece of cardboard. Hold the cardboard up to the sun, allowing the sun’s image to be projected onto a flat surface. Be sure to look only at the surface and not through the cardboard. Just before the moon
completely covers the sun, low-lying valleys on the moon’s
edge will be the only spots that sunlight continues to pass through. These remaining brilliant shafts of light, known as Baily’s beads, will
disappear one after another. And finally, a single
bead of light remains, known as the Diamond Ring, signaling that you’re just seconds away from experiencing totality. Once the last bead disappears and the moon completely
covers the sun’s surface, the view through your eclipse
glasses will be pitch black. Totality achieved. At this point, none of the sun’s
rays are reaching your eyes and it’s the only time that it’s safe to take off your glasses. Remember to put your
eclipse glasses back on before any of the sun’s rays
start to peek through again. Any sunlight reaching your
eyes, even for a few seconds, can cause serious damage. While an eclipse can last a few hours, totality typically occurs
for less than three minutes. Animals and plants have also been known to alter their behavior
during a total eclipse. Songbirds may stop singing,
crickets may start chirping, and flowers might even start to close up. We won’t always be able to
see total solar eclipses. The moon moves about one
and a half inches away from Earth each year. It’s estimated that in
about a billion years, the moon will be too far away from Earth to completely cover the sun. (elegant music)

100 thoughts on “Solar Eclipse 101 | National Geographic

  1. 0:11 "By cosmic CHANCE" in other words, it is unexplained, so I am classifying it as a coincidence. This kind of perfection cannot be observed from any other planet in solar system.
    What is the probability that only from a planet where life is present, this perfection of geometry would be seen? The size of the sun appears to be 100% same as the moon when observed only from the Earth, and not from anywhere else in the solar system. What is the chance that only from a planet where the eyes of the beholders can be dazzled, a cosmic CHANCE would be witnessed?? Someone calculate the probability for this being a mere meaningless coincidence.
    Hence, why should we not believe in the great Creator?

  2. Solar eclipse is beautiful except your not allowed to look unless you have the shade thing
    Reaction: wow cool

  3. hmmm i remember this day of the eclipse all the planet's was in line in jupiter was hungry like always in moved out of line just cause he wanted to eat it was a space party all the planet's had space cake jupiter ate it all hahaha

  4. These videos have powerful knowledge. My school teachers were completely full of s***. Never made anything interesting. Thanks to National Geographic. Amazing perfection!

  5. Moon: hey earth tomorrow is eclipse day
    Earth: wait wat I need to get you a present
    Moon: it's ok you dont need to and your gone roof
    Earth: sun I need something to give moon
    Sun: uhhhhhhhhhhhhhh I dont know
    Earth it's ok I will ask Mars
    5 likes for part 2

  6. AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

  7. I am watching with no special galsses and seeing with both eyes because its a video in reality it can damage your eyes lolol you scardey cats you are being scared

  8. Wrong! Lies! It doesn’t cause eye damage! They just don’t want people to really look at it and feel the energy. I looked at it and I’m not blind!

  9. It's more like "soul"ar eclipse you just feel it in the soul. The energy when you are in the path of totality is phenomenal. No pictures I have seen captured it like my eyes and memory, the ring was pulsating, sunrays lashing about and the animals were going wild. It was so extraordinary. Thank you Bend Oregon and the Ochoco National Forest for hosting us with the most amazing time. "Feel free to howl at the moon"

  10. I missed the eclipse my brothers and my dad saw it. My mom wouldn't let me go outside so I couldn't see it, she didn't see it either xD

  11. 2:10 러블리즈 (Lovelyz) – korea's girl group
    나의지구 (my Earth)
    i want to give you a ring of right

    Earth- boy Moon – minor girl Sun – major girl

  12. In​ thursday 26​ December 2019​ Solar eclipse​ is​ Coming In​ Thailand.

  13. The Moon never has been in 20-30 degrees to the Earth ….it is only 5,14 degrees. It is in the 4,57 minutes .. Andras

  14. Today was the 2 year anniversary of when this video was uploaded. 🤓

    EDIT- 11:34 P.M.: finishes video 5 minutes later
    I had watched this video once before but didn't remember a thing from it.

  15. And remember that some characters from horror movies becomes real and kills people on sight (points if you know the reference)

  16. AMAZING…THE TRUE AND THE LIVING GOD WHO CREATED ALL, AND THE WHOLE UNIVERSE HE SHALL ONLY BE PRAISED, AND NON OTHER. TO GOD BE THE GLORY FOREVER AND EVER. AMEN.

  17. I think that Kuala Lumpur (and some of the other states in Malaysia) will have solar eclipse this year or idk. Maybe a day after the christmas day.

  18. I missed year 1999's perfect solar eclipse.
    I was too young to watch that great event!
    Really a life time event!
    Because total solar eclipse can occur every 400 years on average..!!

  19. When the solar eclipse came 2017 I accidentally looked at the sun and moon for one second but I'm fine just don't do what I did

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