Science Putanaydana Flashcards
He made accurate
measurements and observations of the
position of stars, sun, moon, and the
planets even before the invention of
telescope.
Tycho Brahe
What accurate measurement and observation did Tycho Brahe make?
position of stars, sun, moon, and the
planets even before the invention of
telescope.
His innovations and extensive
collection of data in observational
astronomy was obtained by his student
Johannes Kepler when he died.
Tycho Brahe
Who obtained Tycho Brahe’s innovations and an extensive collection of data in observational astronomy?
Johannes Kepler
What was Tycho Brahe’s innovations and extensive collection of data about?
Observational Astronomy
is a division of astronomy that is concerned with recording data about the observable universe, in contrast with theoretical astronomy, which is mainly concerned with calculating the measurable implications of physical models.
Observational Astronomy
He found that
the orbits of the planets followed three
laws.
Johannes Kepler
What did Johannes Kepler use to find that the orbits of the planets followed three laws?
The data gathered by Tycho Brahe.
He believed in a model that the
sun orbiting the Earth but the
other planets orbiting the sun,
Tycho Brahe
He eventually used the data
gathered by Brahe to prove
heliocentrism and to calculate the
orbital laws.
Johannes Kepler
Johannes Kepler used the data gathered by Brahe to prove what?
heliocentrism and to calculate the
orbital laws.
He also observed that the orbits of the planets are ellipses with the sun at one focus
thus formulating his first law of planetary motion, the Law Of Ellipses.
Johannes Kepler
Johannes Kepler also observed that the orbits of the planets are ________________
ellipses with the sun at one focus
The first law of planetary motion?
The Law Of Ellipses.
Who forumulated the Law Of Ellipses.
Johannes Kepler
States that each planet’s orbit around the Sun is an ellipse
The Law Of Ellipses.
also noticed an
an imaginary line is drawn from a
planet to the sun swept out
equal area of space in equal
time, regardless of the position
of the planet from its orbit.
Johannes Kepler
He
explained that the planet
moves faster when it is near
the sun and slower when it is
far from the sun.
Johannes Kepler
Johannes Kepler explained that planets near the sun ________ and planets further from it ___________, this
observation led him to
formulate his second law of
planetary motion which he
called____________________
moves faster, moves slower, Law Of Equal Areas.
2nd law of planetary motion by Johannes Kepler
Law Of Equal Areas.
In his third law
the ______________, ________________
showed that there is a
_____________________
relationship between a
planet’s distance from
the sun and the
amount of time it
takes to revolve
around the sun.
law of periods, Johannes Kepler, precise mathematical
Three Laws of planetary motion in order:
1) Laws of ellipses
2) Law of equal areas
3) Law of periods
Three Laws of planetary motion explain em in brief summary.
1) Laws of ellipses
- All planets revolve around the sun in an elliptical orbit, with the sun being a focal point.
2) Law of equal areas
- Closer the planet is to the sun, the faster a planet moves and the further away the slower + Planets moves in equal areas and equal intervals of time.
3) Law of periods
- Explains how long a planet finishes a single revolution and that the further a planet is from the sun, the longer it takes for it to finish a revolution.
Long ago these served as a guide for the people’s lives because they thought
them as gods and the stars were used in navigation.
Celestial Objects
Why arecelestial objects
served as a guide for the people’s lives back then?
because they thought
them as gods and the stars were used in navigation.
Long ago the things happening in the sky were perceived by people as what?
divine messages
___________________ have
been proposed by ___________ based on their observations that
lead to humans’ beliefs in _________________.
Theories and models of the universe, Greeks, astronomy
two conflicting models of the universe; _____________
the
Geocentric theory and the Heliocentric theory.
is a concept
that describes the Earth
as the centre of the
universe
Geocentric model
Earth is at the center of
universe and other
objects revolve around it
Geocentric model
Sun appearing to be
revolving around the
Earth once per day and
an observer for Earth
sees a stationary Earth
Geocentric model
Is an
astronormical rnodel in
Whhich the Earth and
planets rmove around
the Sun at the centre of
the Solar syster-n
Heliocentric Model
Sun Is at the centre Of
the solar systern while
other objects including
the Earth revolve
around the Sun
Heliocentric Model
Telescopic Evidence
Heliocentric Model
stated that the Earth is the center of the universe
Geocentric theory
this model considered that the sun is the center of the universe.
Heliocentric Model
they also believed in the heliocentric theory back then. Clue: these are 3 blokes
Eudoxus, Aristotle, and Ptolemy
stated that the Earth is the
center of the universe
Geocentric theory
Which
considered that the sun is the
center of the universe.
Heliocentric theory
There were scientists who supported the geocentric model like
Eudoxus, Aristotle, and Ptolemy
believed in Heliocentric theory.
Aristarchus and Copernicus
The ideas about the
spherical Earth were also argued
at around ____________. in
ancient time.
6th Century B.C
Q
One of the Scientists
who supported the idea of a
spherical Earth was ___________.
Aristotle
He also observed that every
a portion of Earth tends toward the
center and form a sphere by
_________________
CONVERGENCE OR
COMPRESSION.
He also explained that the
travelers going south see southern
constellations rise higher above
the horizon and during the __________________, the shadow of Earth on
Moon is ______________
lunar
eclipse, round.
He also observed that the
stars seen in Egypt and Cyprus
were not seen in the northerly
regions and this could only
happen in a _____________
Tycho Brahe, curved surface.
___________
believed that the Earth is
____________.
Aristotle and the ancient greeks, spherical
To prove his claim, he
provided physical and
observational arguments about
this. He also observed that every
portion of Earth tends toward the
center and form a sphere by
CONVERGENCE OR
COMPRESSION.
Aristotle
Even before the invention of ___________,
astronomers and ancient people have already
observed different astronomical phenomena
particularly the things happening on the sun,
moon, and the planets
telescope
The motion of the sun was studied by
the ancient ______________ using a
primitive way of ____________which they called as
_________.
Babylonian and Egyptian, sundial, GNOMON
rising and setting of the ____________in the________________, respectively,
SUN , east and
the west,
point where the Sun rises and sets in the
________________varies in a year,
HORIZON
phases of the _____________,
moon
lunar ______________,
eclipse
_____ eclipse,
solar
daily and annual motion of the _________ , and
7. planets ______________, ______________, ______________, ______________, and
______________.
stars, Mercury, Venus, Mars, Jupiter, and
Saturn.
Q
In a lunar eclipse, the Moon moves into
the _____________ cast by______________.
shadow of Earth ,the Sun
When the Moon passes through the
the outer part of Earth’s shadow—the
_____________ where the light of the Sun is
only partly extinguished—the Moon
dims only slightly in what is called a
______________
penumbra, penumbral eclipse.
, where the light of the Sun is
only partly extinguished—the Moon
dims only slightly in what is called a
__________________.
penumbral eclipse
When the Moon
passes through the central part of
Earth’s shadow—the ___________, where the
direct light of the Sun is totally
blocked—the lunar eclipse is considered
partial if the Moon is partly within the
umbra or total if the Moon is
completely within it.
umbra