a: Four types of shadow regions-umbra (U), inner penumbra (P2), outer
Umbra, penumbra and antumbra - Wikipedia
How long does it take for the moon's shadow to move across Earth
Morning name: penumbra
a: Four types of shadow regions-umbra (U), inner penumbra (P2
Mrs. Flynt's Wiki Page / umbra
Incorrectly rendered penumbra region (left) and 2D illustration of the
a: Four types of shadow regions-umbra (U), inner penumbra (P2
Eclipses
a) hard shadow shows the umbra, and (b) soft shadow explains
How long does it take for the moon's shadow to move across Earth
a: Four types of shadow regions-umbra (U), inner penumbra (P2
Subtle lunar eclipse July 4 – 5 – Stephens Memorial Observatory