Astronomy

Question 1

It gives in detail the mathematical theory of the motions of the Sun, Moon, and planets. Ptolemy made his most original contribution by presenting details for the motions of each of the planets.

Answer 1

Ptolemy

Question 2

He is best known as the first astronomer to posit the idea of a heliocentric solar system—a system in which the planets and planetary objects orbit the sun.

Answer 2

Copernicus

Question 3

known for his accurate and comprehensive astronomical and planetary observations

Answer 3

Brahe, Tycho

Question 4

German astronomer who discovered three major laws of planetary motion

Answer 4

Kepler, Johannes

Question 5

Galileo first discovered that the Moon had mountains just like Earth. He also discovered 4 of Jupiter’s moons. Using his telescope, Galileo made many observations of our Solar System. He came to believe that the idea that the Sun and other planets orbited around the Earth was not correct.

Answer 5

Galileo

Question 6

Besides his work on universal gravitation (gravity), Newton developed the three laws of motion which form the basic principles of modern physics. His discovery of calculus led the way to more powerful methods of solving mathematical problems.

Answer 6

Newton, Isaac

Question 7

He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology and is regarded as one of the most important astronomers of all time

Answer 7

Hubble, Edwin

Question 8

Ursa Major is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.

Answer 8

Ursa Major

Question 9

Ursa Minor, also known as the Little Bear, is a constellation in the Northern Sky.

Answer 9

Ursa minor

Question 10

Orion is a prominent constellation located on the celestial equator and visible throughout the world. It is one of the most conspicuous and recognizable constellations in the night sky. It was named after Orion, a hunter in Greek mythology

Answer 10

Orion

Question 11

Canis Major is a constellation in the southern celestial hemisphere. In the second century, it was included in Ptolemy’s 48 constellations, and is counted among the 88 modern constellations.

Answer 11

Canis major

Question 12

a northern constellation between Andromeda and Cepheus.

Answer 12

Cassiopeia

Question 13

a very large star of high luminosity and low surface temperature. Red giants are thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion.

Answer 13

red giant

Question 14

a small very dense star that is typically the size of a planet. A white dwarf is formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula.

Answer 14

White dwarf

Question 15

A main sequence star is any star that is fusing hydrogen in its core and has a stable balance of outward pressure from core nuclear fusion and gravitational forces pushing inward

Answer 15

Main-sequence star

Question 16

a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

Answer 16

Supernova

Question 17

a region of space having a gravitational field so intense that no matter or radiation can escape.

Answer 17

Black hole

Question 18

a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 trillion miles).

Answer 18

Light-year

Question 19

Polaris is 1° from the north celestial pole, and it remains in the same location in the sky all year, making it a useful navigation tool. Polaris is actually a double star with a faint companion star and has an apparent magnitude of 2.04. Also called North Star

Answer 19

Polaris