astronomers and stars

Question 1

Ptolemy

Answer 1

the idea of an earth centered universe.

Question 2

copernicus

Answer 2

who formulated a model of the universe that placed the Sun rather than the Earth at the center of the universe.

Question 3

Tycho Brahe

Answer 3

and writer known for his accurate and comprehensive astronomical and planetary observations.

Question 4

Johannes Kelper

Answer 4

He is best known for his laws of planetary motion, based on his works Astronomia nova, Harmonices Mundi, and Epitome of Copernican Astronomy.

Question 5

Galileo

Answer 5

Known for his work as astronomer, physicist, engineer, philosopher, and mathematician, Galileo has been called the “father of observational astronomy.”

Question 6

Isaac Newton

Answer 6

who is widely recognized as one of the most influential scientists of all time, and a key figure in the scientific revolution.

Question 7

Edwin Hubble

Answer 7

and observational cosmology and is regarded as one of the most important astronomers of all time.

Question 8

Ursa major

Answer 8

a constellation in the northern sky, whose associated mythology likely dates back into prehistory. It’s other name is Great bear.

Question 9

Ursa minor

Answer 9

also known as the Little Bear, is a constellation in the Northern Sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the North American name, Little Dipper: seven stars with four in its bowl like its partner the Big Dipper.

Question 10

Orion

Answer 10

a prominent constellation located on the celestial equator and visible throughout the world. It’s other name is the Hunter.

Question 11

Canis major

Answer 11

is a constellation in the southern celestial hemisphere. It’s other name is the Greater Dog.

Question 12

Cassiopeia

Answer 12

is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. It’s other name is the Seated Queen.

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, making the radius large and the surface temperature around 5,000 K or lower.

Question 14

White dwarf

Answer 14

is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: its mass is comparable to that of the Sun, while its volume is comparable to that of Earth.

Question 15

Main- sequence star

Answer 15

the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.

Question 16

Supernova

Answer 16

is a transient astronomical event that occurs during the last stellar evolutionary stages of a star’s life, either a massive star or a white dwarf, whose destruction is marked by one final, titanic explosion.

Question 17

Black hole

Answer 17

is a region of space time exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.

Question 18

Light-year

Answer 18

is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometers or 5.9 trillion miles.

Question 19

Polaris

Answer 19

designated Alpha Ursa Minor, commonly the North Star or Pole Star, is the brightest star in the constellation of Ursa Minor.