Outer 6

Question 1

How many moons does Uranus have

Answer 1

27

Question 2

What are the 5 main moons of Uranus

Answer 2

Titiania, Oberon, Ariel, Umbriel and Miranda

Question 3

What is the density of Uranus’ moons and what does this suggest

Answer 3

around 1400 Kgm^-3
Suggests that they are made of ice and rock

Question 4

Features of Titania and Oberon

Answer 4

Heavily cratered
Not much geological activity
Less reflective than saturn’s moons (due to dirty ice surfaces)
Radiation Darkening - dark appearance due to radiation and high energy particles striking the surfaces of the moons. This causes chemical reactions that lead to build up of organic material

Question 5

What is the darkest Uranian moon

Answer 5

Umbriel

Question 6

Features of surface of Ariel

Answer 6

signs of resurfacing and cracks, caused by external tidal force from Uranus

Question 7

Features of Miranda’s surface

Answer 7

wide range of terrrains ( ridges, valleys, oval faults etc) due to catastrophic ditruption more than once during its lifetime

Question 8

How many moons does Neptune have

Answer 8

14

Question 9

3 Main moons of Neptune

Answer 9

Proteus, Triton, Nereid

Question 10

Features of Triton and Nereid orbits

Answer 10

Triton has a retrograde orbit, Nereid is prograde but has a very elliptical orbit (eccentricity 0.75)

Question 11

Features of Triton

Answer 11

Smallest of the “large” outer solar system moons, after the Gallilean moons and Titan
Surface temp 37K
Thin nitrogen atmosphere
Nitrogen frost forms over the poles of the planet
Few craters suggests surface activity in the past
Lakes of water ices suggests water volcanism

Question 12

How were Uranus’ rings discovered

Answer 12

Stellar occultation

Question 13

How does stellar occultation work in relation to Uranus

Answer 13

Light from distant star observed
As Uranus passed in front of star and light levels dropped but it also flickered 40 mins before and after the main dip

Question 14

Do all Jovian planets have rings

Answer 14

yes

Question 15

How many rings does uranus have

Answer 15

9 rings

Question 16

How are the 5 main rings of uranus named and size

Answer 16

Alpha, Beta, Gamma, Delta and epsilon
Range in radius from 44000km to 51000km

Question 17

Appearance of Uranus’ rings

Answer 17

Dark, narrow and widely spaced

Question 18

How small are the particles is Uranus’ rings

Answer 18

~1cm in diameter

Question 19

How are rings of planets held in place

Answer 19

Shepherd moons

Question 20

How many rings does Neptune have

Answer 20

5 dark rings (3 narrow, 2 broad)

Question 21

Outermost ring of Neptune

Answer 21

Adams ring, Clumped in places (looks disconnected but is continuous just very thin in some areas)