1. Essential Question: Why do we sometimes see solar and lunar eclipses?
Cornell Notes Page 65
Essential Question: Why do we sometimes see solar and lunar eclipses?

2. Solar Eclipse
Sun is blocked by moon when moon passes between Earth and the sun
moon’s shadow is cast on earth.
Can only occur at New Moon

3. Total Solar Eclipse moon completely covers the sun
Only outermost layer of sun is visible (Corona)
Only visible in small bands

6. Solar Eclipse

7. sun’s apparent size is bigger than the moon’s, forms a ring.
Annular Solar Eclipse
sun’s apparent size is bigger than the moon’s, forms a ring.

8. Partial Solar Eclipse
Moon only partially blocks the sun.
Visible over much broader path than total eclipse

17. Paths of Solar Eclipse

19. Will you see a partial or total eclipse? Depends on the shadows.
Penumbra - Faint outer shadow; partial eclipses are seen in these shadows.
Umbra- Dark inner shadow; total eclipses are seen from within the umbra.

20. UMBRA
penumbra

21. Penumbra and umbra

22. Lunar Eclipse Earth’s shadow falls on the moon
Occurs at full moon when Earth is directly between the moon and the sun.
Earth’s shadow falls on the moon

23. Lunar Eclipse Earth’s shadow falls on the moon
Occurs at full moon when Earth is directly between the moon and the sun.
Earth’s shadow falls on the moon

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

27. Why don’t we see solar and lunar eclipses every month?