astronomy

Question 1

Ptolemy

Answer 1

earth was center of universe

Question 2

copernicus

Answer 2

sun was center of universe

Question 3

Brahe , tycho

Answer 3

recorded precise observations of the planets

Question 4

kepler, johannes

Answer 4

used brahes work to determine planets revovle around sun

Question 5

Galileo

Answer 5

used telescope to watch moon and sun

Question 6

Newton, Isaac

Answer 6

all objects in universe attract towards each other through gravity

Question 7

Hubble, Edwin

Answer 7

other galaxies exist beyond milky way

Question 8

Ursa Minor

Answer 8

a constellation

Question 9

Orion

Answer 9

a constellation

Question 10

Canis major

Answer 10

a constellation

Question 11

Cassiopeia

Answer 11

a constellation

Question 12

Red giant

Answer 12

a dying star

Question 13

Ursa major

Answer 13

a constellation

Question 14

White dwarf

Answer 14

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

Question 15

Main-sequence star

Answer 15

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

Question 16

Supernova

Answer 16

supernova is a powerful and luminous explosion of a star. A supernova occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion.

Question 17

Black hole

Answer 17

black hole is 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 18

Parallax

Answer 18

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 19

Light-year

Answer 19

the distance light travels in one year.

Question 20

Polaris

Answer 20

a star in the northern circumpolar constellation of Ursa Minor.