Baily's beads during a total solar eclipse. The irregular landscape of the Moon means that its edge isn't perfectly smooth as it passes in front of the sun. It looks as if there are beads of bright sunlight coming through valleys and between mountains. They're named in honor of British astronomer Francis Baily who wrote an extensive account of them. ©Mona Evans, “Solar Eclipses”

Diamond ring effect. The Moon's surface isn't smooth and just before totality in an eclipse the last bit of sunlight shines through the lunar valleys. ©Mona Evans, “Solar Eclipses”

Solar Eclipses: An Observer's Guide (Infographic) - When the moon covers up the sun, skywatchers delight in the opportunity to see a rare spectacle. Mona Evans, “Solar Eclipses”

Solar eclipse, Cairns, Australia 2012. The eclipsed Sun reappearing and peeking through the clouds. (Photo: Bob Winter) ©Mona Evans, “Solar Eclipses”

Total eclipse, Australia November 2012. The clouds have parted long enough to see the solar corona at the time of totality. (SLOOH SpaceCamera - Live Event) ©Mona Evans, “Solar Eclipses”

If you were on the Moon during a total lunar eclipse, you'd see a total solar eclipse. It might look something like this, with the Earth's nightside faintly shining. (Credit: Hana Gartstein) Mona Evans, "Lunar Eclipses"

Solar eclipse, as seen from Earth’s orbit


Earth and the Moon.

Moon obscuring the Sun, with Venus on top

Map of the Moon

Uranus rings and moons

moon and earth from space


The Mineral Moon (NASA/JPL) - this mosaic of 53 images was recorded by the Jupiter-bound Galileo spacecraft as it passed near our own large natural satellite in 1992. The pictures were recorded through three spectral filters and combined in an exaggerated false-color scheme to explore the composition of the lunar surface as changes in mineral content produce subtle color differences in reflected light.

Moon phases

The moon and its phases ....

Giant solar flare!