Kuiper Belt
What causes Haumea's ellipsoidal shape?
its rapid rotation
What causes Pluto to have a retrograde rotation?
its rotation axis is inclined 119.6* from the plane of its orbit
What does Makemake's extremely low average temperature mean?
its surface is covered with methane, ethane, and possibly nitrogen ices
What are the Kuiper belt objects composed of?
largely of frozen ices, such as methane, ammonia, and water
Is Haumea spherical?
no
How many Kuiper Belt objects are expected to reside there?
over 70,000
What does the Kuiper Belt consist of?
small bodies which are remnants from the Solar System's formation
What was Haumea named after?
the Hawaiian goddess of childbirth
What is Sedna named for?
the Inuit goddess of the sea
What is beyond the Kuiper Belt?
the Scattered Disk
What is Makemake named for?
the creator of humanity and god of fertility in the mythology of the Rapa Nui
What is Eris named for?
the goddess in Greek mythology who is a personification of strife and discord
Hi'iaka
the outer and larger and brighter of Haumea's two moons
Namaka
the smaller inner satellite of Haumea
Describe the objects in the Scattered Disk
they are KBO-like bodies with extremely large orbits that take them as far as 100 AU from the Sun
What is Eris?
trans-Neptunian object (TNO) native to the Scattered Disk
How was Ultima Thule formed?
two objects collided, but the collision was weak enough that they just stuck together instead of destroying one another
What are the two must haves of dwarf planets?
1. must orbit the Sun 2. must have gravity strong enough to form the body in to a sphere
Haumea's mass compared to Pluto's
1/3 the mass of Pluto
What dwarf planet used to be a planet before being reclassified as an asteroid, then accepted as a dwarf planet?
Ceres
Name Eris' moon and what is it named for
Dysnomia; the Greek Goddess of lawlessness and daughter of Eris
What is the largest known dwarf planet by mass and the 9th largest body known to orbit the Sun directly?
Eris
Name the largest object in a collision family
Haumea
Which of Haumea's satellites have a shorter orbital period?
Hi'iaka
Name Haumea's two satellites
Hi'iaka and Namaka
What dwarf planet's diameter is 2/3 that of Pluto?
Makemake
What is the 3rd largest known dwarf planet in the Solar System
Makemake
What is the largest known member of the Kuiper Belt?
Pluto
The Kuiper Belt is home to what three of the five recognized dwarf planets?
Pluto, Haumea, and Makemake
What dwarf planet is both a trans-Neptunian Object and a dwarf planet candidate?
Sedna
Which dwarf planet is one of the reddest objects in the solar system?
Sedna
Which of Neptune's moons is accepted to be a captured Kuiper Belt object?
Triton
Which is flatter, Ultima or Thule?
Ultima
Ultima Thule
a contract binary composed of two planetesimals
Where is the Kuiper Belt?
a region of the solar system beyond the planets, extending from the orbit of Neptune
What is true about Sedna's orbit?
for most of its orbit, Sedna is farther from the Sun than any other known dwarf planet candidate
What causes Sedna's dark red color?
hydrocarbon sludge
What was Eris called the Solar System's 10th planet?
it is more massive than Pluto
