Astronomy exam 1

Question 1

universe

Answer 1

everything we know of

Question 2

cosmology

Answer 2

study of the structure of the universe

Question 3

cosmogony

Answer 3

how the universe changes with time

Question 4

theory

Answer 4

production of the future

Question 5

Eudoxus

Answer 5

guessed earth was a sphere

Question 6

Ptolemy

Answer 6

stars move east, planets move backwards for small time

Question 7

Nicholos

Answer 7

sun is center

Question 8

ellipse

Answer 8

2 points where the sum of distance from them and 2 other points remain constant

Question 9

Tycho

Answer 9

observed ellipse

Question 10

johannes kepler

Answer 10

modeled a copernican

Question 11

keplers first law

Answer 11

planets travel in elliptical orbits with the sun at on focus

Question 12

keplers second law

Answer 12

planets sweep out equal areas in equal time

Question 13

perihelion

Answer 13

closest to the sun

Question 14

aphelion

Answer 14

furthest from the sun

Question 15

celestial sphere

Answer 15

shell of stars surrounding the earth

Question 16

constellations

Answer 16

stars the represent mythical or real figures

Question 17

altitude

Answer 17

angle of stars with the horizon and you

Question 18

zenith

Answer 18

point directly overhead at altitude 90 degrees

Question 19

celestial polse

Answer 19

point about the celestial sphere appears to turn north/south

Question 20

celestial equator

Answer 20

divides celestial sphere into north/ south celestial hemispheres

Question 21

circumpolar

Answer 21

stars that dont rise or set

Question 22

ecliptic

Answer 22

plane of the earths orbit

Question 23

zodiac

Answer 23

constellations through which the sun passes during the year