Las fases lunares son un fenómeno fascinante que resulta de la interacción entre la posición relativa de la Luna, la Tierra y el Sol. A lo largo de aproximadamente 29.5 días, la Luna atraviesa un ciclo completo de fases, que van desde la Luna nueva, donde la Luna está entre la Tierra y el Sol y no es visible desde la Tierra, hasta la Luna llena, donde la cara visible de la Luna está completamente iluminada por el Sol. Entre estos extremos, la Luna pasa por diferentes fases intermedias, como el cuarto creciente y el cuarto menguante, que son el resultado de la progresión gradual de la luz solar que ilumina la superficie lunar desde diferentes ángulos. Estas fases lunares tienen profundas implicaciones culturales, científicas y prácticas en muchas sociedades a lo largo de la historia.

1. The Phases
of the Moon

2. Table of contents
01
03
02
04
What are the phases of the moon?
What are the phases of the moon?
Importance of the phases of the moon
Activities

3. What are the
phases of the
moon?
01

4. What are the phases of
the moon?
The lunar phases or phases of the Moon are the apparent
changes in thevisible portion of theMoon, dependingon how
illuminatedit is by its position relative to the Earth and the
Sun. These are not actual changes in the nature of our only
satellite, but rather its relative position and illumination,
thus allowing us to observe more or less of its surface with
the naked eye. To each position, thus, we give the name of a
phase. Following these lunar phases, man has created the
lunar calendar.

5. The phases of the Moon compose,
in their totality, a cycle of 28 days
of duration that we know as
lunation or lunar cycle, which goes
from the total illumination of the
Moon until its total occultation.
How long does a lunar cycle last?
The explanation for this lunar
cycle has to do with the Moon's
orbit around the planet Earth,
which is completed in its entirety
every four weeks. This is known as
a sidereal month.
J F M A M J J A S O N D
5 4 5 3 3 1 1 7 6 5 4 3
12 11 12 11 10 9 9 15 13 12 10 10
19 18 20 19 19 17 16 21 20 19 18 18
28 26 28 26 25 24 23 29 28 27 26 26
30

6. What are the
phases of the
moon?
02

7. The main phases through which the
satellite passes are four and are known
as: new moon, first quarter, full moon
and third quarter
Until reaching these, there are
intermediate phases known as: waxing
crescent, waxing gibbous, waning
gibbous and waning crescent.
What are the phases of the moon?

8. New moon
It is the first phase of the lunar cycle and the
satellite can hardly be perceived. This
happens because the part of the moon facing
the Earth is not illuminated by the Sun. In
this phase, the moon rises and sets at the
same time as the sun, between 6 am and 6
pm. After this phase, the illumination of the
satellite becomes increasingly greater

9. In the northern hemisphere it appears
illuminated on the right side gradually, from
the new moon until almost half of the moon
is illuminated. At this stage, the moon can be
seen during the day and sets before
astronomical midnight.
Waxing
crescent

10. First quarter
In this phase, half of the moon can be seen
illuminated on the right side in the northern
hemisphere, and vice versa in the southern
hemisphere. It is visible especially in the
afternoon until the first half of the night.

11. Also known as the crescent gibbous, the
moon gradually takes on a convex shape that
gets progressively larger as the days go by.
It is visible throughout the afternoon and
most of the night.
Waxing gibbous

12. Full moon
It happens when the face of the moon
pointing towards the earth is fully
illuminated by the sun. In this phase the
moon can be seen all night from our planet.

13. It happens when the luminous part of the moon
begins to decrease progressively. In this phase, the
moon is visible most of the night and at dawn.
Waning gibbous

14. Half of the moon is illuminated on the left
side in the northern hemisphere and vice
versa in the southern hemisphere. It is visible
especially during the early morning and part
of the morning.
Third quarter

15. It is the last phase before a new moon cycle begins
again. It can be seen concave with a minimal part of
its left side illuminated.
Waning crescent

16. Importance of the
phases of the moon
03

17. Importance of the
phases of the moon
The phases of the moon are part of the astronomical
phenomena that mankind has observed since ancient times,
and on the basis of which it has established numerous
calendars. Lunar calendars were widely used by ancient
cultures such as the Egyptians, so, according to popular
culture, the lunar phases could affect the growth of crops,
human hair and even the development of gestation and
childbirth.

18. Activities
04

19. Activity 1
Connect with a line the image with the corresponding phase of the moon.
New moon
First quarter
Full moon
Third quarter

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