The document discusses various astronomical phenomena that were observed and known to ancient astronomers before the advent of telescopes. It describes lunar eclipses which occur when the Earth is between the sun and moon, casting its shadow on the moon. Solar eclipses occur when the moon is between the Earth and sun. It notes the motion of stars across the sky each night and their changing positions throughout the year. It also discusses the observation of planets like Mercury, Venus, Mars, Jupiter and Saturn which were differentiated from stars by their bright light and irregular motions.

1. ASTROVIDEO!
Direction. Watch the video!

2. Question:
“What do you call those phenomena that you
just watched in the video?”

3. ASTRONOMICAL PHENOMENA
KNOWN TO ASTRONOMERS
BEFORE THE ADVENT OF TELESCOPES
Harold N. Husayan
Special Science Teacher I

4. Astronomical Phenomena
Aggregates of
matter in outer
space, such as
stars, planets,
comets, etc. and the
properties and
processes they
undergo.
- U.S. National Library
of Medicine
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5. SOLAR ECLIPSE
LUNAR ECLIPSE BOTH
Activity 2: Venn Diagram?
Direction. Listen to your teacher for the instruction.

6. Activity 2: Venn Diagram?
Direction. Listen to your teacher for the instruction.
LUNAR ECLIPSE SOLAR ECLIPSE
BOTH

7. Lunar Eclipse
- It was observed that sometimes the
moon or part seemed to be covered
by a shadow for a brief moment.
This shadow is from the planet
earth when the Earth is between the
moon and the sun.
- This event is referred to as a lunar
eclipse, wherein the moon changes
into a dark or blood red color.
- Fact: Year 2022 will have 2 Lunar
eclipse:
1. May 15-16, 2022
2. November 8, 2022
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8. Solar Eclipse
- Ancient astronomers also observed
the occurrence of a solar eclipse.
- A solar eclipse occurs when the
moon is in between the sun and the
Earth and the moon partially or
entirely blocks out the sun
- Fact: Year 2022 will have 2 Solar
eclipse:
1. April 30, 2022
2. October 25, 2022
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9. Motion of the Stars
- The stars are observed to be
embedded in a heavenly sphere
that turns around an axis one day.
- This axis crosses the celestial
sphere at a particular mark in the
northern sky near the northern star,
Polaris.
- Also, the constellations' positions in
the night sky change depending on
the time of the year.
- 2 Types of Motion of the stars:
1. Diurnal motion- daily
2. Annual motion- yearly
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10. Visibility of the Planets
- Mercury, Venus, Mars, Jupiter, and
Saturn, thought to be stars, were
discovered as planets called
"wanderers" or "planetes" in
Greek terms.
- Astronomers differentiated planets
from the stars because of their very
bright light and periodic change of
positions, which do not conform to
the stars' behavior belonging to a
constellation in a fixed position.
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11. QUIZ TIME!
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12. Question:
Share and identify other astronomical
phenomena that you might or have
experienced. How do you feel about these
experiences?

13. Assignment: Sundial Making!
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14. Assignment: Sundial Making!
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15. Assignment: Sundial Making!
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16. Assignment: Sundial Making!
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17. Assignment: Sundial Making!
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18. THANK YOU!
KEEP CALM, WEAR YOUR
FACEMASK PROPERLY, &
MAINTAIN 1-METER
PHYSICAL DISTANCING