Question | Answer |
Ancient cultures organized the sky by | linking stars together in patterns |
Constellations | sections of the sky that contain recognizable star patterns |
Ancient Greeks saw a hunter, but the Japanese saw a | drum |
The sky is divided into how many constellations? | 88 |
Why do modern astronomers use the same names for the constellations? | to make communication easier |
The constellations that are visible in the sky are the same or different in the spring or the fall? | different |
zenith | imaginary point directly over the head of the observer |
celestial equator | imaginary extension of Earth's equator into space |
horizon | line where the earth and sky meet |
altitude | angle between an object and the horizon |
right ascension | measure of how far east an object is from where the sun appears on the vernal equinox |
vernal equinox | where the sun appears on the first day of spring |
declination | position of a star in degrees north or south of the celestial equator |
always 90 degrees from zenith | horizon |
circumpolar stars | stars that can be seen at all times of year and all times of night |
Copernicus thought the stars must be very far away because | they never shifted their relative positions |
red shift | as a light source moves away, the light source looks redder |
light year | the distance that light travels in one year |
One light-year is about ____ trillion kilometers | 9.46 |
Are most stars smaller or larger than Earth? | larger |
The stars that you see depend on | your latitude, the time of the year, and the time of night |