as

Question 1

who proposed a geocentric system of astronomy that was undisputed until the late Renaissance

Answer 1

Ptolemy

Question 2

best known as the first astronomer to posit the idea of a heliocentric solar system

Answer 2

Copernicus

Question 3

Made some of the most accurate observations of planetary positions which would eventually prove useful to his predecessors

Answer 3

Brahe Tycho

Question 4

contributing a number of scientific breakthroughs including his famous laws of planetary motion

Answer 4

Kepler Johannes

Question 5

most known for his discovery of the four most massive moons of Jupiter

Answer 5

Galileo

Question 6

famous for his law of gravitation

Answer 6

Newton Isaac

Question 7

who made some of the most important discoveries in modern astronomy

Answer 7

Hubble Edwin

Question 8

constellation that is the most conspicuous of the northern constellations

Answer 8

Ursa major

Question 9

also known as the Little Bear, is a constellation in the Northern Sky

Answer 9

Ursa minor

Question 10

also known as the Three Kings or Three Sisters, is an asterism in the constellation Orion

Answer 10

Orion

Question 11

a constellation in the S hemisphere close to Orion

Answer 11

Canis major

Question 12

belongs to the Perseus family of constellations, along with Andromeda, Auriga, Cepheus, Cetus, Lacerta, Pegasus

Answer 12

Cassiopeia

Question 13

a very large star of high luminosity and low surface temperature

Answer 13

Red giant

Question 14

a small very dense star that is typically the size of a planet

Answer 14

White dwarf

Question 15

Main sequence stars fuse hydrogen atoms to form helium atoms in their cores

Answer 15

Main-sequence star

Question 16

a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass

Answer 16

supernova

Question 17

a region of space having a gravitational field so intense that no matter or radiation can escape

Answer 17

Black hole

Question 18

the angular amount of parallax in a particular case, especially that of a star viewed from different points in the earth’s orbit

Answer 18

Parallax

Question 19

a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km

Answer 19

Light-year

Question 20

is a yellow supergiant star shining with the luminosity of 2500 suns

Answer 20

Polaris (the star)