total solar eclipse tagged posts

Day to Night and Back again: Earth’s Ionosphere during the Total Solar Eclipse

graphic showing layers of Earth atmosphere

A layer of charged particles, called the ionosphere, surrounds Earth, extending from about 50 to 400 miles above the surface of the planet. Credits: NASA’s Goddard Space Flight Center/Duberstein

 
3 NASA-funded studies will use the Aug. 21 total solar eclipse as a ready-made experiment, courtesy of nature, to improve our understanding of the ionosphere and its relationship to the Sun. On Aug. 21, 2017, the Moon will slide in front of the Sun and for a brief moment, day will melt into a dusky night. Moving across the country, the Moon’s shadow will block the Sun’s light, and weather permitting, those within the path of totality will be treated to a view of the Sun’s outer atmosphere, called the corona.
 
But the total solar eclipse will also have imperceptible effects, such as ...
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The Moon is Front and Center during a Total Solar Eclipse

In the lead-up to a total solar eclipse, most of the attention is on the sun, but Earth's moon also has a starring role. Credit: NASA's Goddard Space flight Center/SVS

In the lead-up to a total solar eclipse, most of the attention is on the sun, but Earth’s moon also has a starring role. Credit: NASA’s Goddard Space flight Center/SVS

In the lead-up to a total solar eclipse, most of the attention is on the sun, but Earth’s moon also has a starring role. “A total eclipse is a dance with three partners: the moon, the sun and Earth,” said Richard Vondrak, a lunar scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “It can only happen when there is an exquisite alignment of the moon and the sun in our sky.”

During this type of eclipse, the moon completely hides the face of the sun for a few minutes, offering a rare opportunity to glimpse the pearly white halo of the solar corona, or faint outer atmosphere...

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NASA looks to Solar Eclipse to help understand Earth’s Energy system

DSCOVR's Earth Polychromatic Imaging Camera (EPIC) will capture images similar to this one from the Lagrange 1 point, about a million miles away from Earth. Credit: NASA/Katy Mersmann

DSCOVR’s Earth Polychromatic Imaging Camera (EPIC) will capture images similar to this one from the Lagrange 1 point, about a million miles away from Earth. Credit: NASA/Katy Mersmann

It was midafternoon, but it was dark in an area in Boulder, Colorado on Aug. 3, 1998. A thick cloud appeared overhead and dimmed the land below for more than 30 minutes. Well-calibrated radiometers showed that there were very low levels of light reaching the ground, sufficiently low that researchers decided to simulate this interesting event with computer models. Now in 2017, inspired by the event in Boulder, NASA scientists will explore the moon’s eclipse of the sun to learn more about Earth’s energy system.

On Aug...

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