Eclipses

Mona Evans
Pictures related to my eclipse articles at Astronomy.BellOnline.Com, "Solar Eclipses" http://www.bellaonline.com/articles/art28395.asp and "Lunar Eclipses" http://www.bellaonline.com/articles/art28454.asp solar
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The totally eclipsed Moon of December 30, 1982 almost vanished completely from sight. Dust from the then-erupting Mexican volcano El Chichon was still suspended high in Earth’s atmosphere where it blocked most of the Sun’s rays from reaching the Moon. Credit and copyright: Fred Espenak.

The totally eclipsed Moon of December 30, 1982 almost vanished completely from sight. Dust from the then-erupting Mexican volcano El Chichon was still suspended high in Earth’s atmosphere where it blocked most of the Sun’s rays from reaching the Moon. Credit and copyright: Fred Espenak.

A total lunar eclipse occurs during a Full Moon when the Sun, Earth and Moon line up exactly in that order. Light from the Sun (white lines) skirts the Earth’s atmosphere, which bends and reddens it. It reaches and reflects off the Moon back toward the Earth and we see a beautifully colored disk during totality. Credit: NASA with additions by Bob King.

A total lunar eclipse occurs during a Full Moon when the Sun, Earth and Moon line up exactly in that order. Light from the Sun (white lines) skirts the Earth’s atmosphere, which bends and reddens it. It reaches and reflects off the Moon back toward the Earth and we see a beautifully colored disk during totality. Credit: NASA with additions by Bob King.

Illustration of Columbus using a lunar eclipse to impress the Indigenous people of Jamaica. (Credit: Astronomie Populaire 1879, p 231 fig. 86) Mona Evans, "Four Historic Eclipses" http://www.bellaonline.com/articles/art301534.asp

Illustration of Columbus using a lunar eclipse to impress the Indigenous people of Jamaica. (Credit: Astronomie Populaire 1879, p 231 fig. 86) Mona Evans, "Four Historic Eclipses" http://www.bellaonline.com/articles/art301534.asp

Lunar eclipse of April 2015. Totality was supposed to be very short, but observers report that it didn't even quite happen. There was still a sliver of sunlight on the Moon even at its darkest. (Image credit and copyright: Rolf Wahl Olsen)

Lunar eclipse of April 2015. Totality was supposed to be very short, but observers report that it didn't even quite happen. There was still a sliver of sunlight on the Moon even at its darkest. (Image credit and copyright: Rolf Wahl Olsen)

Risen moon, unshadowed from our view,/ Toward dawn, glides into darkness./ In uncertain times, a dread omen/ Of ending and descent to shadow.//  But this day (for us) a full restoration,/ An amen, fears pacified, night ending./ As Luna’s emerging bright glow/ Is doubled in long & calm reflection.//  (Poem & photograph of the Moon emerging from eclipse - Paul Morgan, Los Angeles, April 5, 2015)

Risen moon, unshadowed from our view,/ Toward dawn, glides into darkness./ In uncertain times, a dread omen/ Of ending and descent to shadow.// But this day (for us) a full restoration,/ An amen, fears pacified, night ending./ As Luna’s emerging bright glow/ Is doubled in long & calm reflection.// (Poem & photograph of the Moon emerging from eclipse - Paul Morgan, Los Angeles, April 5, 2015)

Lunar Eclipse - two views - taken brom Treasure Island, San Francisco. 2015-04-04. (Credit: David Yu)

Lunar Eclipse - two views - taken brom Treasure Island, San Francisco. 2015-04-04. (Credit: David Yu)

Lunar eclipse in Colorado, 2015.04.04. A telescope shows up a blue band as the Moon emerged from totality. Light penetrating the ozone layer becomes bluer, because ozone absorbs red light. This can be seen as a turquoise-blue border around the red. (Image credit: Jimmy Westlake) Mona Evans, "Blood Moons and Lunar Tetrads" http://www.bellaonline.com/articles/art301030.asp

Lunar eclipse in Colorado, 2015.04.04. A telescope shows up a blue band as the Moon emerged from totality. Light penetrating the ozone layer becomes bluer, because ozone absorbs red light. This can be seen as a turquoise-blue border around the red. (Image credit: Jimmy Westlake) Mona Evans, "Blood Moons and Lunar Tetrads" http://www.bellaonline.com/articles/art301030.asp

Total lunar eclipse. The green light beam is a laser being used to measure the Earth-Moon distance. The laser's target is a retroreflector left on the Moon by Apollo 15 astronauts. Timing the return of the laser pulse allows a highly accurate determination of the distance traveled. Performance is improved during the eclipse because direct sunlight is blocked. (Credit & copyright: Dan Long) Mona Evans, "Blood Moons and Lunar Tetrads" http://www.bellaonline.com/articles/art301030.asp

Total lunar eclipse. The green light beam is a laser being used to measure the Earth-Moon distance. The laser's target is a retroreflector left on the Moon by Apollo 15 astronauts. Timing the return of the laser pulse allows a highly accurate determination of the distance traveled. Performance is improved during the eclipse because direct sunlight is blocked. (Credit & copyright: Dan Long) Mona Evans, "Blood Moons and Lunar Tetrads" http://www.bellaonline.com/articles/art301030.asp

A chromolithograph from the German astronomy magazine "Sirius" compares the dark and featureless lunar disk during the eclipse a year after the eruption of Krakatoa (left) with a bright eclipse four years later, after the volcanic aerosols had settled out of the stratosphere (right). Mona Evans, "Blood Moons and Lunar Tetrads" http://www.bellaonline.com/articles/art301030.asp

A chromolithograph from the German astronomy magazine "Sirius" compares the dark and featureless lunar disk during the eclipse a year after the eruption of Krakatoa (left) with a bright eclipse four years later, after the volcanic aerosols had settled out of the stratosphere (right). Mona Evans, "Blood Moons and Lunar Tetrads" http://www.bellaonline.com/articles/art301030.asp

During a total lunar eclipse, the moon passes through the outer part of Earth's shadow, called the penumbra, and then into the dark umbra. When fully immersed in the umbra, the moon is in total eclipse or in totality. (Credit: Sagredo) Mona Evans, "Blood Moons and Lunar Tetrads" http://www.bellaonline.com/articles/art301030.asp

During a total lunar eclipse, the moon passes through the outer part of Earth's shadow, called the penumbra, and then into the dark umbra. When fully immersed in the umbra, the moon is in total eclipse or in totality. (Credit: Sagredo) Mona Evans, "Blood Moons and Lunar Tetrads" http://www.bellaonline.com/articles/art301030.asp

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