Question 1

Phobos and Deimos,the two moons of Mars,are thought to have a unique origin.What is it?

Accepted Answer

Mars's two

Question 2

Titan's thick atmosphere (see the image below)is hypothesized to have been created when ultraviolet photons broke apart methane molecules,ultimately creating the observed smog-like conditions.This process,though,would likely remove all of the atmospheric methane in roughly 10 million years,yet we still see its presence today.How can this be?

Accepted Answer

A)  Cometary impacts periodically bring new methane to Titan. 
B)  Ethane rains down out of the atmosphere, combines with surface rocks, and creates new methane. 
C)  Infrared photons give atmospheric molecules enough energy to recombine into methane. 
D)  Volcanoes on Titan periodically release new methane into the atmosphere. 
A)  Cometary impacts periodically bring new methane to Titan. 
B)  Ethane rains down out of the atmosphere, combines with surface rocks, and creates new methane. 
C)  Infrared photons give atmospheric molecules enough energy to recombine into methane. 
D)  Volcanoes on Titan periodically release new methane into the atmosphere.

Question 3

In 1994,dozens of fragments of Comet Shoemaker-Levy 9 collided with:

Accepted Answer

A)  Jupiter. 
B)  Earth. 
C)  the Moon. 
D)  Saturn. 
A)  Jupiter. 
B)  Earth. 
C)  the Moon. 
D)  Saturn.

Question 4

Why is the asteroid Ceres classified as a dwarf planet?

Accepted Answer

Ceres is spherical,but it is n

Phobos and Deimos,the two moons of Mars,are thought to have a unique origin.What is it?

In 1994,dozens of fragments of Comet Shoemaker-Levy 9 collided with:

Why is the asteroid Ceres classified as a dwarf planet?

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Measuring the Stars

Our Star: the Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

The Evolution of the Universe

Formation of Structure

Life in the Universe

Filters

Exam 9: Small Bodies of the Solar System

Phobos and Deimos,the two moons of Mars,are thought to have a unique origin.What is it?

In 1994,dozens of fragments of Comet Shoemaker-Levy 9 collided with:

Why is the asteroid Ceres classified as a dwarf planet?

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Measuring the Stars

Our Star: the Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

The Evolution of the Universe

Formation of Structure

Life in the Universe

Filters