EclipsesEclipses

2 main types2 main types

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Solar Solar EclipseEclipse

moon passes moon passes between Earth between Earth and the sunand the sun

moon’s shadow is moon’s shadow is cast on earth.cast on earth.

Can Can onlyonly occur at occur at New MoonNew Moon

Total Eclipse-Total Eclipse- moon completely moon completely covers the suncovers the sun

The total effect..The total effect..

1999 Eclipse in Middle East

Annular Eclipse

When was When was the last the last

total solar total solar eclipse?eclipse?

Nov. 14, 2012 in Nov. 14, 2012 in AustraliaAustralia

total eclipses are total eclipses are only visible in only visible in narrow bands narrow bands

Partial EclipsePartial Eclipse Moon only Moon only partially blocks partially blocks the sun.the sun.

Visible over Visible over much broader much broader path than total path than total eclipseeclipse

Future Solar EclipsesFuture Solar Eclipses

Do I see a Do I see a total or total or partial partial

eclipse? eclipse? It depends on the It depends on the

shadows…shadows…

PenumbraPenumbra - - Faint Faint

outer shadow;outer shadow; ppartial artial eclipseseclipses are seen in are seen in these shadows.these shadows.

UmbraUmbra- - Dark inner Dark inner

shadow;shadow; total eclipsestotal eclipses are seen from within the are seen from within the umbra. umbra.

penumbra

UMBRA

Penumbra and umbraPenumbra and umbra

What is a What is a Lunar Lunar

eclipse?eclipse?

Occurs at full Occurs at full moonmoon when Earth is when Earth is directly between the directly between the moon and the sun.moon and the sun.

Earth’s shadow Earth’s shadow falls on the moonfalls on the moon

Lunar EclipseLunar Eclipse

Effects are quite subtle Effects are quite subtle unless there is a total unless there is a total lunar eclipse.lunar eclipse.