Lunar Eclipse 101 | National Geographic

Lunar Eclipse 101 | National Geographic


(bright music) – [Narrator] A lunar eclipse
happens when the earth blocks some or all of the sun’s direct light from reaching the moon. This cosmic event only takes
place during a full moon, which happens once every
29 and a half days, or the length of one full orbit of the moon around the earth. So why don’t we have
an eclipse every month? The moon’s orbit is tilted a few degrees in relation to the earth, so the earth, moon, and
sun don’t always align. When the earth does eclipse the sun, it casts two types of shadows on the moon, a larger shadow, known as the penumbra, and a smaller, darker
shadow, known as the umbra. There are three types of lunar eclipses. The first is a total lunar eclipse, when the sun, moon, and earth
are in perfect alignment and the moon falls within
the earth’s umbral shadow. Total lunar eclipses are the most striking of the three types because they
turn the moon a sunset red. While shorter, blue wavelengths of light are scattered outward by
the earth’s atmosphere, longer, red wavelengths
are refracted, or bent, inward toward the moon,
making it appear red. The brightness of the moon’s red glow depends upon how much dust and clouds are in the earth’s atmosphere. Following volcanic activity, ash can block out enough light to render the moon a darker
red, or even near black. A partial lunar eclipse, the second type, occurs when the earth, moon, and sun don’t perfectly align, so only part of the moon passes into earth’s umbra. Earth’s shadow appears very dark on the side of the moon facing earth. Last, a penumbral lunar eclipse, occurs when the moon passes through earth’s penumbral shadow. The event is so subtle that
most people don’t even notice. The moon will appear just
slightly darker than normal. Lunar eclipses occur up
to three times a year and can be observed from the entire nighttime half of the earth. Unlike during a solar eclipse,
it’s safe to look at the moon with the naked eye during a lunar eclipse. It is only because of the
distances of the sun and moon from the earth that we are able to witness total lunar eclipses. As the moon inches away
from the earth each year, one day, billions of years from now, the moon will be too far
away to fall completely within earth’s umbral shadow. Until then, we can
occasionally enjoy seeing our own planet’s shadow cast upon the largest object in the night sky.

100 thoughts on “Lunar Eclipse 101 | National Geographic

  1. Lunar eclipses occur up to three times a year and can be seen with the naked eye. What new facts did you learn about the lunar eclipse?

  2. Many people have received the (spiritual grace of Qalb) meditation from the Moon. There is no condition of any religion. The method is: when there is a full moon from the East, look at it
    with concentration and when you see the image of His Holiness Riaz Ahmed Gohar Shahi on it, say ALLAH ALLAH ALLAH (three times) and you will be blessed with this spiritual grace.
    Thereafter, without any fear or reservation, begin the practice (of the meditation), as described in the book (The Divine Love). Believe (the fact) that the image on the moon has spoken to many people in every language. You can also try looking and speaking with it.

  3. thank you . the show was good. we had 4 blood moons in 2 years 2018 2019 jan.20 2019 do you think we are living in of the time??yes or no.

  4. I had a very weird experience during the las moments of the blood moon, the moon was just above me and i rotate my head to the left and all directions and the shadow of hearth followed every time my point of view, like a proyection… i resesearched about the holographic point of view and fits my experience

  5. Thanks fr this channel because i will see the video and explain in my class i learnd many things from this channel so thanks

  6. I have seen the red moon twice in my lifetime. I’m very grateful that I was able to see both of these beautiful eclipses

  7. I know another thing about the Total eclipse,is that the moon in this eclipse can be also called Blood moon.

  8. Red moon: ohhhhhhhhh am back
    Neptune earth and Ceres: not you again
    Red moon: now who should I annoy today
    Neptune and earth: see ya Ceres
    Ceres: noooo
    Red moon: hey Ceres
    Ceres: y-yes
    5 likes 4 part 2

  9. So basically a Lunar eclipse is a Solar Eclipse but instead of the moon blocking the sun, it is the Earth.

    Lucky Moon, 3 solar eclipses per year and we only get like 1 every 2 years

  10. as always national pornographic couldnt resist to push their radiculous big bang nonsense theory in their propaganda video
    just ude your common sense
    if we are loosing our moon little by little it means that "millions years ago" moon was very close to earth
    which would cause a huge problems
    that explains what happened to the tall dinosaurs – they got mooned to death 🙂

  11. 8 hours from the time of writing this comment, the last lunar eclipse of the decade will begin. don't miss out!
    Partial Lunar Eclipse
    2000hrs – 2300hrs
    Peak 2134hrs
    UTC

  12. Can Anyone please explain, that in case of total lunar, why only red light get refracted , instead of other 6,? Please

  13. i often see lunar eclipse when I have to go pee in the middle of the night. It will shine right through my window lol

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