Astronomy

Question 1

Ptolemy

Answer 1

he came up with the idea of a solar system

Question 2

Copernicus

Answer 2

known for having accurate astronomical observations

Question 3

Kepler, Johannes

Answer 3

he is best know for his laws of planetary motion

Question 4

Galileo

Answer 4

he discovered four massive moons

Question 5

Newton, Isaac

Answer 5

he is most famous for his laws of gravitation

Question 6

Hubble, Edwin

Answer 6

the most important astronomer of all time

Question 7

Ursa major

Answer 7

a constellation in the northern sky

Question 8

Ursa minor

Answer 8

a constellation in the northern sky

Question 9

Orion

Answer 9

a constellation on the celestial equator

Question 10

Canis major

Answer 10

a constellation in the celestial southern hemisphere

Question 11

Cassiopeia

Answer 11

a constellation in the northern sky

Question 12

Red giant

Answer 12

a bloated star that is bigger than normal and near the end of its life

Question 13

White dwarf

Answer 13

a star that has already died but is now smaller

Question 14

Main-sequence star

Answer 14

stars that fuse hydrogen

Question 15

Supernova

Answer 15

a very large explosion from a star that is at the end of its life

Question 16

Black hole

Answer 16

what is often left when a star dies a black hole has nearly infinite mass and light cannot escape it

Question 17

Parallax

Answer 17

a displacement or difference in the apparent position of an object viewed along two different lines of sight

Question 18

Light-year

Answer 18

the distance that light travels in a year

Question 19

Polaris

Answer 19

the name of the north star