Content Questions

Content Questions

a . Why is the North Star called the North Star ? Include where in the sky it is when viewed from the North Pole , your location , and the Equator Also include what is meant by circumpolar stars

The title North Star ' is a name given to any star that is best suited for navigation . This means that as the earth continues to revolve around the sun , the star that is given the title also changes . The location of the star should be at least at a circumpolar origination from that of

the north celestial pole . This means that the said star is visible to the naked eye on earth for it to be effectively utilized through navigation . The North Star is naturally a source of information for the navigators as to where or what latitude on earth are they already in during travel . The visual magnitude that the North Star provides the travelers usually determine the way by which their journey should trod

b . Explain what causes a lunar eclipse . Explain what causes a solar eclipse . Why do eclipses not occur every month

The eclipse is the phenomenon wherein an astronomically body blocks the side of a planet facing the sun and be aligned with a certain heavenly body . This naturally occurs as each planet revolves in their own orbits which are all centered around the sun . Eclipse is differentiated into two depending on the characteristic of their alignment and the body that is involved namely the lunar and solar eclipse . In the earth 's perspective , the lunar eclipse occurs on the occasion where the earth moon and the sun are perfectly aligned wherein the earth is in the center . On the other hand , the solar eclipse occurs when the three bodies are perfectly aligned wherein the moon is in the center thus blocking off the light from the sun . Eclipses only occur once during long periods of time because a perfect alignment is necessary yet the three bodies have varying dimensions and sizes in terms of their orbit

c . Describe the phase changes of the Earth that one would see if viewed from the Moon

The phases of the moon change because of the amount of the illumination that it particularly receives from the sun . These particular phases are then made visible on earth . All in al , there are at least eight phases of the moon . However , only four of them are considered major changes within the moon 's physical appearance on earth . The changes particularly happen depending on the relation of the revolving of the moon around the earth while the earth in turn revolves around the sun . This interchanging process of revolving and the speed adjustments that happen between the three major heavenly bodies affect the ways by which the moon and the sun rises and sets which are made visible to humans on earth as the light of both bodies intend to illuminate each other

d . How do you explain planet retrograde motion by the...