Question

-Which TWO of the following statements are CORRECT with respect to the synodic period of the...

-Which TWO of the following statements are CORRECT with respect to the synodic period of the moon?

The synodic and sidereal periods would still be different lengths of time if the Earth did not revolve around the sun and was stationary in space with respect to the sun.

The synodic period of the moon is easy to observe if you are so inclined.

The synodic period equals 27.3 days.

The synodic period of the moon is equal to one rotation of the moon around its axis.

The synodic period equals the orbital period of the moon around the Earth.

The synodic period regulates the beat for solar eclipses.





-Any central solar eclipse Two answers are CORRECT.

always involves the Earth’s shadow.

must happen at least twice each year.

has very little chance of passing through Bethlehem, PA.

could happen as many as six times a year.

could be annular or total.





-PICK THE BEST ANSWER. The ecliptic represents

all of the possible answers.

the intersection positions of the celestial equator (vernal and autumnal equinoxes).

the projection of Earth's orbit into space.

the region of the sky where eclipses can take place.

the location of the moon when it is at a node.

the plane which is created by the motion of the sun due to Earth's revolution.



-The lower limit (4) regarding the number of solar plus lunar eclipses that must occur each year results from the fact that

there are two nodes, the ascending node and descending node and one lunar and one solar eclipse must occur at each node.

the moon and the sun have two extremes with respect to their distance from the Earth.

the week is composed of only seven days. If the week had more days, the number of eclipses happening in one year would be greater.

the moon’s orbit lies in the plane of the ecliptic.

It is possible for an eclipse to occur before and after the node therefore creating the two possible eclipses.



-If the moon's orbit was exactly in the plane of the ecliptic, Earth’s orbit, and not titled by five degrees, approximately one lunar and one solar eclipse would occur


twice each year.

once in every 18.61 years.

seven times each year.

each month.

twice each month.

once each year.

Homework Answers

Answer #1

THE SYNODIC PERIOD OF THE MOON

The synodic period is 27.3 days.

The synodic period equals the orbital period of the moon around the earth.

ANY CENTRAL SOLAR ECLIPSE

must happen atleast twice in a year

could be annular or total

ECLIPTIC

the projection of earth orbit into space

the plane which is created by the motion of the sun

THE LOWER LIMIT REGARDING THE NUMBER OF LUNAR AND SOLAR ECLIPSES THAT MUST OCCUR EACH YEAR RESULTS FROM THE FACTS THAT

there are two nodes, the ascending and descending node where one lunar and one solar eclipse happens.The ascending node is the node when the moon moves up from South to North. The descending node is the node when the moon moves down from North to South.

IF THE MOONS ORBIT WAS EXACTLY IN THE PLANE OF ECLIPTIC, EARTH's ORBIT AND NOT TILTED BY 5 DEGREES, APPROXIMATELY ONE LUNAR AND ONE SOLAR ECLIPSE WOULD OCCUR

each month

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