astronomy

Question 1

Ptolemy

Answer 1

he wrote a book that combined all the ancient knowledge of astronomy he could find

Question 2

Copernicus

Answer 2

he published a new theory that would eventually revolutionize astronomy

Question 3

Tycho Brahe

Answer 3

he used several large tools to make the most detailed astronomical observations that had been recorded so far

Question 4

Johannes Kepler

Answer 4

he he didn’t agree with Brahe’s theory after analyzing the data he announced that all planets revolve around the sun elliptical orbits and that the sun is not in the exact center of the orbits

Question 5

Galileo

Answer 5

he became one of the first people to use a telescope to observe objects in space

Question 6

Isaac Newton

Answer 6

he showed that all objects in the universe attract each other through gravitational force

Question 7

Edwin Hubble

Answer 7

proved that other galaxies exist beyond the milky way

Question 8

Ursa Major

Answer 8

it is a constellation in the northern sky whose associated mythology likely dates back into prehistory

Question 9

Ursa minor

Answer 9

in astronomy, a constellation of the northern sky, at about 15 hours right ascension and 80° north declination, and seven of whose stars outline the Little Dipper.

Question 10

Orion

Answer 10

is a prominent constellation located on the celestial equator and visible throughout the world.

Question 11

Canis major

Answer 11

Canis Major is a constellation in the southern celestial hemisphere. In the second century, it was included in Ptolemy’s 48 constellations,

Question 12

Cassiopeia

Answer 12

is a constellation in the northern sky named after the vain queen Cassiopeia, mother of Andromeda, in Greek mythology, who boasted about her unrivaled beauty.

Question 13

Red giant

Answer 13

is a luminous giant star of low or intermediate mass in a late phase of stellar evolution. The outer atmosphere is inflated and tenuous

Question 14

white dwarf

Answer 14

A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage

Question 15

main sequence star

Answer 15

is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness.

Question 16

supernova

Answer 16

is a powerful and luminous stellar explosion. This transient astronomical event 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

is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.

Question 18

parallax

Answer 18

is the apparent displacement of an object because of a change in the observer’s point of view. The video below describes how this effect can be observed in an everyday situation

Question 19

light year

Answer 19

is the distance light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.

Question 20

Polaris star

Answer 20

is a star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris and is commonly called the North Star or Pole Star.