eclipses

Question 1

Shadow

Answer 1

Produced when an object blocks the light emitted from a source. The appearance
shadow depends on the type of source. An extended source as the Sun will produce a Shadow
with Umbra and Penumbra.

Question 2

Umbra:

Answer 2

the darkest part of the shadow

Question 3

Penumbra

Answer 3

the lighter shade surrounding the umbra.

Question 4

Eclipse

Answer 4

happens when an astronomical object projects its shadow covering another astronomical object

Question 5

Lunar Eclipse

Answer 5

 Earth is between the Sun and the Moon
 Earth’s shadow covers the Moon
 Happens on Full Moon phase
 Takes place nearly every 6 months
 Its only visible in the side of Earth where is nighttime.
 Can be Total, Partial, and Penumbral

Question 6

Solar Eclipse:

Answer 6

The Moon is between the Earth and the Sun
 Moon’s shadow covers a small region of the Earth
 Only visible in the small region of the Earth covered
 Happens only at New Moon Phases
 Can be Total, Partial, and Annular

Question 7

Source

Answer 7

The shape of the source affects the components of a shadow.

Question 8

Total Lunar Eclipse

Answer 8

When the moon is completely submerged into Earth’s Umbra

Question 9

Partial Lunar Eclipse

Answer 9

When only a portion of the moon is passing through the Umbra

Question 10

Penumbral Lunar Eclipse

Answer 10

When the moon passes through Earth’s Umbra

Question 11

Total Solar Eclipse

Answer 11

Happens in New Moon only. The Moon covers nearly all the sun while casting the Umbra into the Earth.

Question 12

Partial Solar Eclipse

Answer 12

When the Moon covers only a portion of the Sun, due to misalignment

Question 13

Annular Solar Eclipse

Answer 13

When the Moon is aligned with the Sun, but its at its farthest distance from the Earth, leaving an outer ring of the Sun visible.

Question 14

Angular Size of the Moon

Answer 14

0 moon =2aractan Rmoon/Dmoon

Question 15

Angular Size of the Sun

Answer 15

0 sun = 2arctan Rsun/Dsun