Filters
Question type
Study Flashcards

What is meant by the astronomical unit?

Correct Answer

verifed

verified

The astronomical uni...

View Answer

When a planet's orbit takes it closest to the Sun, it's called


A) aphelion.
B) vernal equinox.
C) crossing the ecliptic.
D) perihelion.
E) none of the above; a planet's distance from the Sun never changes.

F) A) and B)
G) A) and E)

Correct Answer

verifed

verified

A planet (or comet) will speed up as it approaches the Sun.

A) True
B) False

Correct Answer

verifed

verified

Why was Copernicus' model much simpler than Ptolemy's?

Correct Answer

verifed

verified

To duplicate retrograde motion, Copernic...

View Answer

Galileo found the rotation period of the Sun was approximately


A) a day.
B) a week.
C) a month.
D) three months.
E) a year.

F) A) and E)
G) B) and D)

Correct Answer

verifed

verified

Galileo's discovery of four moons orbiting provided new support for the ideas of Copernicus.

Correct Answer

verifed

verified

Copernicus' Heliocentric theory explains that


A) the Sun lies at one focus of an ellipse.
B) Mars will retrograde when it reaches a certain position on its epicycle.
C) planetary orbits are elliptical in shape.
D) Venus retrogrades when she overtakes us at inferior conjunction.
E) all planets lie between the Sun and Earth.

F) A) and D)
G) A) and E)

Correct Answer

verifed

verified

Kepler's third law allows us to find the average distance to a planet from observing its period of rotation on its axis.

A) True
B) False

Correct Answer

verifed

verified

Showing 61 - 68 of 68

Related Exams

Exam 1

Charting the Heavens: the Foundations of Astronomy

108 Questions

Exam 3

Light and Matter: the Inner Workings of the Cosmos

112 Questions

Exam 4

Telescopes: the Tools of Astronomy

99 Questions

Exam 5

The Solar System: Interplanetary Matter and the Birth of the Planets

148 Questions

Exam 6

Earth and Its Moon: Our Cosmic Backyard

149 Questions

Exam 7

The Terrestrial Planets: a Study in Contrasts

132 Questions

Exam 8

The Jovian Planets: Giants of the Solar System

123 Questions

Exam 9

Moons, Rings, and Plutoids: Small Worlds Among Giants

161 Questions

Exam 10

The Sun: Our Parent Star

124 Questions

Exam 11

Measuring the Stars: Giants, Dwarfs, and the Main Sequence

154 Questions

Exam 12

The Interstellar Medium: Star Formation in the Milky Way

128 Questions

Exam 13

Stellar Evolution: the Lives and Deaths of Stars

167 Questions

Exam 14

Neutron Stars and Black Holes: Strange States of Matter

131 Questions

Exam 15

The Milky Way Galaxy: a Spiral in Space

166 Questions

Exam 16

Normal and Active Galaxies: Building Blocks of the Universe

175 Questions

Exam 17

Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

119 Questions

Exam 18

Cosmology: the Big Bang and the Fate of the Universe

150 Questions

Exam 19

Life in the Universe: Are We Alone

114 Questions

Show Answer