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Chapters 2 & 3
Homework questions
27
Astronomy
02/23/2011

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Cards

Term
Who was the first to demonstrate that a moving object remains in uniform
motion unless a force is applied on it?
Definition
Galileo
Term
Why do we have seasons on Earth?
Definition
As the Earth goes around the Sun and the Earth's axis remains pointed toward Polaris,
the Northern and Southern hemispheres alternately receive more and less direct
sunlight.
Term
Aristarchus of Samos is famous for proposing that
Definition
The Sun was at the center of the Universe.
Term
Kepler is also known as
Definition
The father of celestial mechanics
Term
Does a geocentric model implies that the Earth is spherical?
Definition
No
Term
What is Ptolemy famous for?
Definition
He found a way to explain planetary retrograde motions.
Term
Kepler believed in the heliocentric model
Definition
True
Term
Who was the first to explain that the tides on Earth are caused by the Moon?
Definition
Kepler
Term
Whose data Johannes Kepler used to analyze the orbit of Mars?
Definition
Brah's
Term
The __ is the path the Sun follows as it appears to circle around the celestial sphere.
Definition
ecliptic
Term
In the Greek geocentric model, what was the correct order of the celestial
bodies, starting from the center?
Definition
Earth, Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn, the fixed stars
Term
A solar annular eclipse happens when the angular size of the __ is smaller
that the angular size of the __ .
Definition
Moon, Sun
Term
Can an annular eclipse of the Moon ever occur?
Definition
No because the shadow of the Earth is always greater than the physical size of the Moon.
Term
Who was the first to use a telescope as a scientific instrument?
Definition
Galileo
Term
What does geocentric mean?
Definition
The earth is at the center
Term
Who wrote this? A planet orbits the Sun in an ellipse with the Sun located at
one of the focii.
Definition
Kepler
Term
Which civilization developed this model?
Definition
The Greeks
Term
Fearing the Catholic Church, whose works was published the day he died?
Definition
Copernicus
Term
Which of the following statements about the celestial sphere is not true?
Definition
The "celestial sphere" is just another name for our Universe.
Term
Eratosthenes is famous for calculating
Definition
a very good estimation for the size of the Earth.
Term
It is possible to view the Moon in first-quarter phase the day after a total lunar
eclipse.
Definition
false
Term
Who was the first to observe that Jupiter had satellites?
Definition
Galileo
Term
Who was the first to explain the working of a telescope?
Definition
Kepler
Term
Why couldn't Galileo (and others before him) detect stellar parallax?
Definition
Because all stars are too far away for the effect to be detected back then.
Term
Which one of these events is most likely to have sparked the start of the
Renaissance period?
Definition
The fall of Constantinople
Term
What is "stellar parallax"?
Definition
On an interstellar scale, parallax created by the different orbital positions of the Earth
causes nearby stars to appear to move relative to more distant stars.
Term
You are standing on the Earth's equator. Which way is Polaris, the North star?
Definition
On the northern horizon.