Circle Of Darkness:Earths Eclipse

See a Flirtatious Lunar Eclipse This Friday Night

Contents:

  • See a flirtatious lunar eclipse this Friday night
  • The Conversation
  • Earth's shadow
  • Umbra and Penumbra
  • Related Stories
  • Navigation menu

    • At the full moon, there will be a lunar eclipse, when the moon passes directly behind the Earth, resulting in a darker, reddish-colored moon.

    See a flirtatious lunar eclipse this Friday night

    And at the new moon, there will be a solar eclipse, when the sun is blocked by the moon. Can we learn anything from eclipse events, or are they really just oddities that happen in nature? We can definitely learn things from eclipses. When the moon blocks the sun, we can see the corona, the famous visual of the halo of light around the dark disk of the moon.

    The Conversation

    Currently astronomers study this by creating an artificial eclipse with a mask built into special instruments on telescopes called coronagraphs. Eclipses give scientists opportunities to get more data to study the corona in depth. We can also learn about Earth itself. In an area affected by an eclipse, the darkening of the sun leads to a sudden drop in temperature. NASA-funded studies during this eclipse will look at the effects from the eclipse on our atmosphere as well as what happens on land.

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    Previous studies observed animal behavior during an eclipse in and noted some animals went through their night routines as the sun disappeared while others became nervous. And we can learn about the whole universe.

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    Less than years ago, an eclipse proved a prediction Albert Einstein had made about gravity. That success helped make him a household name.

    Earth's shadow

    In his general theory of relativity , Einstein had predicted that gravity could bend the path of light. The effect he predicted was very slight, so it would best be viewed as the light passed a very large celestial body as part of its travels across a very long distance of space.

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    He then compared those positions to their known positions at night. He saw that the gravity of the sun had bent the path — exactly as, and in the precise amount that, Einstein had predicted. It is very unusual that the moon and the sun just happen to be at the right distances and sizes to appear to have the same size in our sky. Venus and Mercury, for instance, can also pass in front of the sun from our perspective.

    Umbra and Penumbra

    No getting up in the raw hours before dawn. The penumbra is nowhere near as dark as the inner shadow because varying amounts of direct sunlight filter into it, diluting its duskiness. As you look past the Earth toward the Sun, you would see the Sun gradually covered or eclipsed by the Earth. Less sunlight would be available to illuminate the Moon, so your friends back on Earth would notice a gradual dimming of the Moon, very subtle at first but becoming more noticeable as the eclipse progressed.

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    Moon passes through the Earth's shadow; Total, Partial, & Penumbral lunar Lunar Eclipses occur when the Moon passes through the shadow of the Earth. touch the Earth, so observer's in the shadow path see the Sun as a ring ("annulus "). You would see a round shadow cast onto the Earth. This particular eclipse will first hit the Pacific Ocean, then move into Oregon, cross the U.S.

    This eclipse, the Moon only flirts with the umbra. Sun — Earth — Moon in a straight line in that order. Instead, the moon typically passes a little above or below north or south of the small, circle-shaped shadow cast by our planet, and no eclipse occurs.

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    NASA When the moon blocks the sun, we can see the corona, the famous visual of the halo of light around the dark disk of the moon. A total eclipse occurs when the moon is in exact alignment between the sun and the earth. The air molecules and particulates in Earth's atmosphere scatter the shorter wavelengths of this sunlight; thus, the longer wavelengths of reddish light reaches the Moon, in the same way that light at sunset or sunrise appears reddish. Mnemonic Devices for Remembering the Phases of the Moon. Brief moon eclipse coming April 4 April 1, A brief total eclipse of the Moon may be visible on April 4 to skywatchers in western North America, Australia and East Asia, astronomers say.

    Or it clips the outer edge of the shadow and we see — you guessed it — a penumbral eclipse. Occasionally, red areas of light dot the corona. This event is hydrogen gas, as it travels along loops of the sun's magnetic field caused by the activity of sunspots. A total eclipse occurs when the moon is in exact alignment between the sun and the earth. During first contact, the moon moves in front of the sun, and the sun changes from a bright, round orb to a crescent.

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    At second contact, the moon covers the sun, and a faint strip of sunlight is visible at the edge of the moon. This strip is caused by the many craters, valleys and mountains that give the moon a rough surface.

    This strip of light also appears at third contact, when the moon begins to move out of the path of the sun. Following second contact, bright beads of light appear at the edge of the moon. Called Baily's beads, these dots of lights, like the light strip seen in second contact, are caused by the sun's light peeking through the moon's rough surface.

    Baily's beads occur at only one edge of the moon; the glow of the sun's corona. Just before totality, some of the sun's light still peeks past the moon, while the sun's corona begins to form more fully around the moon.