Time - Earth, Moon, Sun

The sun rises and sets at different times during the year

• TRUE

• FALSE

This is when the Sun is either at its highest or lowest position during the year...

• Solstice

• Equinox

• First Point of Ares

• Summer

This is the time of year when day and night are equal...

• Solstice

• Equinox

• First Point of Ares

• Summer

Apparent Solar Time is based on...

• The time we use on our watches

• The position of the Sun in the sky at a particular time

A solar day is...

• The time it takes for a star to be positioned at the same point in the sky as the previous day

• The time it takes for the Sun to be positioned at the same point in the sky as the previous day

A sidereal day is 4 minutes ________ than a solar day.

A sidereal day is 4 minutes longer than a solar day. Why?

• The Sun rises earlier

• Earth rotates around the Sun

• Earth is orbiting at the same time as rotating about the Sun.

The Equation of Time is...

• Apparent Solar Time + Mean Solar Time

• Apparent Solar Time - Mean Solar Time

• GMT + Apparent Solar Time

• GMT - Apparent Solar time

What is a disadvantage of using a sundial to tell the time?

• Doesn't work without bright sunlight

• Doesn't work if improperly aligned

• Requires EOT calculations to be accurate

• All of the above

This can be used to determine local noon and the observers longitude.

• Orrery

• Planisphere

• Shadow stick