Who discovered Neptune in the late 19th century?

Who discovered Neptune in the late 19th century?
 
  a. Galileo
 b. Herschel
 c. Galle
 d. Le Verrier and Adams
  e. Tombaugh and Lowell

Question 2

What is the latest hypothesis for the creation of the ovoids on the surface of Miranda?
 
  a. A secondary bombardment episode occurred near the Kuiper belt
 b. Nitrogen ices warmed by the Sun melt and refreeze
 c. Gravitation pulled together fragments of an earlier shattered moon
 d. Tectonic plate movement at various subduction zones in its oceans
 e. internal heat driving large and slow convection currents in the icy mantle

Question 3

What is a unique geologic feature of Miranda?
 
  a. faults
 b. ovoids
 c. lava flows
 d. sinuous rilles
 e. sulfur-based volcanoes

Question 4

Which Uranian satellite appears to have been the most geologically active?
 
  a. Titania
 b. Ariel
 c. Miranda
  d. Umbriel
  e. Oberon

Question 5

What evidence is there that Titania underwent an active geological phase?
 
  a. It has no large craters on its surface and a network of faults.
  b. It currently has active volcanoes on its surface.
 c. It is covered in methane ice.
 d. It has a very smooth and highly reflective surface.
 e. It has a large rocky core surrounded by an icy mantle.