ALT In this eclipse photo, the Moon is passing fully in front of the Sun, creating a perfectly black disc surrounded by the Sun's shining yellow corona. Faint lines of red can be faintly seen on the border. Credit: NASA/Bill Ingalls

ALT In this image of the Sun during a partial solar eclipse and partially obscured by clouds, the International Space Station, with a crew of seven onboard, is seen in silhouette (slightly left of center) against the dim Sun. Credit: NASA/Joel Kowsky

ALT The Moon is seen passing in front of the Sun during a solar eclipse. The Sun is a bright, glowing orange crescent. Credit: NASA/Bill Ingalls

ALT This composite image shows the progression of a total solar eclipse over a sunflower field in Spain. Credit: NASA/Bill Ingalls