Lecture 1

Question 1

The reason we see stars and planets in the places we do is due to 2 things:

Answer 1

Rotation and orbital motion

Question 2

Celestial sphere:

Answer 2

Imaginary sphere surrounding Earth on which positions of
stars, planets, and other celestial bodies are projected

Question 3

Right Ascension, RA:

Answer 3

like longitude - east/west

Question 4

Declination, DEC

Answer 4

Like latitude: North/South

Question 5

Horizon

Answer 5

a great circle that divides the celestial
sphere into hemispheres

Question 6

Zenith:

Answer 6

Highest point in sky. Single point
directly overhead from an observer

Question 7

When a star is on the ___, it is at its highest point

Answer 7

Meridian

Question 8

Meridian:

Answer 8

Imaginary
circular line that passes
through the north point and
south point of the horizon,
celestial pole above horizon,
and the zenith

Question 9

Do All Stars Seen From Norman Rise &
Set?

Answer 9

No; some are circumpolar

Question 10

Circumpolar stars:

Answer 10

Never go below the horizon

Question 11

When is a star circumpolar?

Answer 11

Stars w/ declination above (90 - Latitude)

Question 12

From Norman, All stars w/ declination higher than ___deg are circumpolar

Answer 12

55

Question 13

The earth rotates from:

Answer 13

West to east

Question 14

For someone in Sydney, Australia, the daily rotation of the Earth makes many stars appear to:

Answer 14

Rise in the east and set in the west