astronomy notes

Question 1

ptolemy

Answer 1

believed that earth was the center of the universe and the planets and the sun revolved around the earth

Question 1

Copernicus

Answer 1

believed that the sun is the center of the universe and all the plants revolved around the sun

Question 2

Brahe, Tycho

Answer 2

recorded very precise observation of the plants and stars

Question 3

Kepler, Johannes

Answer 3

`used brashness work to determine that all the plants revolve around the sun in elliptical orbits

Question 4

Galileo

Answer 4

used a telescope to make important discoveries about the moon and sun

Question 5

Newton, Isaac

Answer 5

discover that an the objects in the universe attract each other through gravitational force

Question 6

Hubble, Edwin

Answer 6

proved that other galaxies exist beyond the milky way {our galaxy}

Question 7

Ursa major

Answer 7

constellation in the nothern sky aka: great bear-cataloged by ptolemy big dipper

Question 8

Ursa minor

Answer 8

constellation in the northern sky aka: smaller or lesser bear also identified by ptolemy little dipper

Question 9

Orion

Answer 9

major constellation, named for the Greek mythologic hunter. one of the most conspicuous constellation and contains many bright stars. located on the celestial equator - Orion, the hunter 2 of the 10 brightest stars are located in Orion near Orion near Orion {know as on of his hunting dogs}

Question 10

Canis major

Answer 10

a constellation built around Sirius, known as the Dog Star, the brightest star in the sky

Question 11

Cassiopeia

Answer 11

a constellation of the northern sky easily recognized by a group of five bright stars forming a slightly irregular W

Question 12

Red giant

Answer 12

a dying star in the final stages of stellar evolution

Question 13

White dwarf

Answer 13

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

Question 14

Main-sequence star

Answer 14

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

Question 15

Supernova

Answer 15

the explosion of a star.

Question 16

Black hole

Answer 16

a place in space where gravity pulls so much that even light can not get out

Question 17

Parallax

Answer 17

the angle between the Earth at one time of year, and the Earth six months later, as measured from a nearby star.

Question 18

Light-year

Answer 18

Light-year is the distance light travels in one year. Light zips through interstellar space at 186,000 miles

Question 19

Polaris

Answer 19

the imaginary line that extends through the planet and out of the north and south poles.