PHYSCI: Lesson 4.1-4.3

fuck me bru

Democritus

who pioneered the concept of Milky Way?

Democritus

who proposed that the Milky Way was composed of thousands of unresolved stars?

Plato

who viewed the universe as perfect and unchanging?

Plato

who reasoned that the most perfect orbit of a planet would be circular and its motion is constant like the stars?

Thales

who believed that “everything comes out of water and that Earth floats on water?”

Aristotle

who proposed that the motion of terrestrial objects can be natural, violent, or alteration?

solar eclipse

Even before the discovery of the telescope, there were celestial phenomena already known to astronomers of ancient civilizations.

They already observed the following:

1. _____

2. lunar eclipse

3. phases of the moon

4. pattern and motion of the stars

5. visibility of planets

lunar eclipse

Even before the discovery of the telescope, there were celestial phenomena already known to astronomers of ancient civilizations.

They already observed the following:

1. solar eclipse

2. _____

3. phases of the moon

4. pattern and motion of the stars

5. visibility of planets

phases of the moon

Even before the discovery of the telescope, there were celestial phenomena already known to astronomers of ancient civilizations.

They already observed the following:

1. solar eclipse

2. lunar eclipse

3. _____

4. pattern and motion of the stars

5. visibility of planets

pattern and motion of the stars

Even before the discovery of the telescope, there were celestial phenomena already known to astronomers of ancient civilizations.

They already observed the following:

1. solar eclipse

2. lunar eclipse

3. phases of the moon

4. _____

5. visibility of planets

visibility of planets

Even before the discovery of the telescope, there were celestial phenomena already known to astronomers of ancient civilizations.

They already observed the following:

1. solar eclipse

2. lunar eclipse

3. phases of the moon

4. pattern and motion of the stars

5. _____

calendar

“In early civilizations, the astronomy has provided the basis for the _____.”

2000BCE in Mesopotamia

The oldest known lunar eclipse happened when and where?

2500BCE

When did the alignment of the sun to the Stonehenge mark the rising and setting points of the Sun during solstices?

Anaximenes

who proposed the concept of Celestial Sphere during 560BCE?

celestial sphere

“stars as fixed points inside a solid vault”

ecliptic

“The Ancient Greeks observe that the Sun appears to move around the Earth once a year, counterclockwise, along with the stationary path called _____.”

once a year, counterclockwise

“The Ancient Greeks observe that the Sun appears to move around the Earth _____, _____ along with the stationary path called ecliptic.”

zodiac

“As the Sun moves along this stationary path called ecliptic, it passes 12 constellations called _____.”

diurnal and annual motion, precession

what are the 3 types of Earth’s motion?

diurnal motion

this refers to the apparent daily motion of the stars and other celestial bodies in the sky.

diurnal motion

this can be observed because the sun, moon, planets, and stars rise in the east and set in the west.

Earth’s rotation

what causes for Diurnal Motion to happen?

annual motion

this refers to the apparent shift in the location of the stars to the west, relative to the sun.

annual motion

this can be observed because the stars change positions throughout the year.

Earth’s revolution around the Sun

what causes for Annual Motion to happen?

equinox

this refers to a day with an equal duration of day and night.

spring equinox

what do you call it when there is an equal duration of day and night during March 20 or 21?

Autumnal Equinox

what do you call it when there is an equal duration of day and night during September 21 or 23?

solstice

this refers to a day with either the longest or shortest day.

winter solstice

what do you call it when theduring March 20 or 21?