Hint

Answer

Speed of light (miles)

186,000 m/s

Speed of light (kilometers)

300,000 km/s

Equation for finding speed of light

d=vt

How many official constellations are there?

88

celestial latitude

declination

celestial longitude

right ascension

Where is the prime meridian?

Grenwich

What does an arcsecond measure?

angles

Points at both ends of the celestial rotation axis

north and south celestial poles

Halfway between the celestial poles, perpendicular to the axis

celestial equator

Point above observer's head

zenith

Point below observer's feet

nadir

the path of the Sun among the fixed stars

ecliptic

the 12 constellations the Sun passes through

zodiac

"wandering stars"

planets

where the ecliptic crosses the celestial equator (2x)

vernal and autumnal equinoxes

"equal nights"

equinox

when the Sun is furthest above the celestial equator (2x)

summer and winter solstices

circle which passes through the zenith and nadir

celestial meridian

places where the sun appears at the zenith at noon on the first day of the summer/winter

Tropics of Cancer and Capricorn

days of the week in French

dimanche, lundi, mardi, mercredi, jeudi, vendredi, samedi

months when the Earth is closest (perihelion)/farthest (aphelion) from the Sun

January/July

what insolation (sunlight spreading over the earth) actually means

incoming solar radiation

the original last month in the calendar

February

the angle measured westward along the celestial equator from the local meridian to the hour circle (meridian) of the object

LHA (local hour angle)

the number of days it takes the moon to revolve 360 degrees (also a sidereal period)

27.3

the number of days it takes the moon to line up again with the Sun

2.2

time from one new moon to the next (synodic month)

29.5 days

phases of the moon

new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, third quarter, waning crescent
