Planets
How many planets are there as of 2026?
8 Planets
How many moons does Mars have?
2 (Phobos, Deimos)
How many Dwarf Planets are officially recognized by the IAU?
5 (Pluto, Eris, MakeMake, Haumea, Ceres)
How does a solar eclipse form?
When an object goes in front of the sun.
What are at least one of the planets that are believed to have diamond rain? Each planet named is 100 (x2) points.
Uranus, Neptune
What is the Third Planet from the sun?
Earth
What is the biggest moon?
Ganymede
What is the Dwarf Planet with the most mass?
Eris
About 93 Million miles, or about 149 Million Kilometers.
What is the shortest solar day?
September 18th
What is the hottest planet?
Venus (867 °F / 464 °C)
What is the biggest planet to moon ratio in the solar system?
The Earth and Luna (12,756km:3,476km measured at their equilateral diameter, or about a 3.7/1 ratio)
What does KBO stand for?
Kuiper Belt Object
What is Earth’s axis tilt relative to its rotation?
23.4°
How many Trojans does Jupiter have?
About 13,000 known Trojans
Why is Venus so hot?
Greenhouse Gasses Heating (Excess CO2, or Carbon Dioxide)
What moon is also known as JUPITER IV?
Callisto
What are the “Regions” of the Kuiper belt called? 600 for each one named.
Classical Kuiper Belt
Cold Classical Kuiper Belt Objects (KBOs)
Hot Classical Kuiper Belt Objects (KBOs)
Resonant Kuiper Belt
Scattered Disc (or Belt)
Extreme Trans-Neptunian Objects (TNO’s)
What are trojans?
Smaller celestial bodies (mostly asteroids but can be dust clouds) that share same orbits of a larger object.
How long is the tropical year on Earth by at least 2 decimal places? Each extra decimal place is 600 (x2) extra points.
365.242181 days
What is the farthest planet relative to the sun you can see reliably with an average naked eye?
Saturn
What are at least one of the two unnamed moons of Neptune called? Each moon named is worth 750 points
S/2021 N1, S/2002 N5
What are objects that look like snowmen made from asteroids?
Contact Binaries
What is the only planet that doesn’t have any trojans?
Mercury
What is the permanent catalog number for Pluto?
134340 Pluto