This French watercolor from the late 17th century depicts a solar eclipse observed by a party of French Jesuits in Siam (now Thailand) in April 1688.

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NASA created this chart in 1967 to illustrate the flight path and key mission events for the upcoming Apollo missions to the Moon. Use the download link for the full-size version.

moon.nasa.gov/resources/348/apollo-mission-flight-plan-1967/

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Our Sun is a huge ball of electrically-charged hot gas. This charged gas moves, generating a powerful magnetic field. The Sun's magnetic field goes through a cycle, called the solar cycle.

Every 11 years or so, the Sun's magnetic field completely flips. This means that the Sun's north and south poles switch places. Then it takes about another 11 years for the Sun’s north and south poles to flip back again.

Evolution of the Sun in extreme ultraviolet light from 2010 through 2020, as seen from the telescope aboard Europe's PROBA2 spacecraft. Credit: Dan Seaton/European Space Agency (Collage by NOAA/JPL-Caltech)

Giant eruptions on the Sun, such as solar flares and coronal mass ejections, also increase during the solar cycle. These eruptions send powerful bursts of energy and material into space.

spaceplace.nasa.gov/solar-cycles/en/

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Source: NASA
Published: August 23, 2018

Version A of the Sun installment of our solar system poster series.

About the image: A solar flare erupts from the Sun as seen by NASA’s Solar Dynamics Observatory in 2013. Credit: NASA/SDO

solarsystem.nasa.gov/resources/980/the-sun-poster-version-a/

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Calculation of solar and lunar eclipses from: Marvels of Creatures & Strange Things Existing, by al-Qazwini, 14th century

Tags:   Astronomy planets sun moon Venus Mercury Earth Neptune Saturn Uranus asteroids meteor meteorite NASA Webb space science space science Rover Magellan globe marble black hole solar system Apollo eclipse zodiac astronomer mariner Marvels of Creatures and Strange Things Existing al-Qazwini 14th century solar eclipse lunar eclipse mars martian astronaut

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