astronomy

Question 1

Ptolemy

Answer 1

make accurate predictions of planetary positions and solar and lunar eclipses

Question 2

Copernicus

Answer 2

proposed that the sun was stationary in the center of the universe and the earth revolved around it

Question 3

Brahe, Tycho

Answer 3

made accurate observations of the stars and planets

Question 4

Kepler, Johannes

Answer 4

he made the three laws of planetary motion

Question 5

Galileo

Answer 5

he was the first to report telescopic observations of the mountains on the moon, the moons of Jupiter, the phases of Venus, and the rings of Saturn and said the motion of the Earth causes the tides

Question 6

Newton, Isaac

Answer 6

proposed that all objects in the Universe pulled on each other through gravity

Question 7

Hubble, Edwin

Answer 7

Proposed that there was a universe beyond the Milky Way

Question 8

Ursa major

Answer 8

a constellation that is home to the Big Dipper

Question 9

Ursa minor

Answer 9

a constellation that is home to the Little Dipper

Question 9

Orion

Answer 9

a constellation located on the celestial equator and visible throughout the world that looks like a hunter

Question 10

Cassiopeia

Answer 10

a constellation in the northern sky named after the vain queen Cassiopeia

Question 11

Red giant

Answer 11

forms after a star has run out of hydrogen fuel for nuclear fusion, and has begun the process of dying

Question 12

White dwarf

Answer 12

what stars like the Sun become after they have exhausted their nuclear fuel

Question 13

Main-sequence star

Answer 13

any star that has a hot, dense core which fuses hydrogen into helium to produce energy

Question 14

Supernova

Answer 14

a powerful and luminous explosion of a star

Question 15

Black hole

Answer 15

a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape its event horizon

Question 16

Parallax

Answer 16

the apparent displacement or the difference in apparent direction of an object as seen from two different points not on a straight line with the object

Question 17

Light-year

Answer 17

the distance light travels in one year

Question 18

Polaris

Answer 18

a star in the northern circumpolar constellation of Ursa Minor

Question 19

Canis major

Answer 19

a constellation in the southern celestial hemisphere