Planets
Comets, etc
Numbers
Satellites, etc
Random
100
These are the smooth areas on the moon
What are maria
100
A popular dwarf planet is thought to reside within this group of icy objects.
What are the Kuiper-belt Objects
100
F = σT4 
What is Flux
100
DAILY DOUBLE. This moon has a melted interior and an atmosphere of mostly nitrogen gas.
What is Triton
100
Studying this measurement tool, we can find a planet's rotation or speed.
What is doppler effect
200
The K-T event, which is thought to have killed T-Rex, is marked by a thin layer of sediment containing high traces of this metal.
What is iridium
200
This nickname is given for a 2km-long object composed of water, CO2, ammonia, methane that sits just before the coma.
What is Dirty Snowball
200
Distance is measured in this.
What is parsec
200
The size of the Earth's orbit to a star's distance helps to calculate this.
What is parallax
200
Jupiter's clouds are called zones, and it's dark ones are called these. Hint: clothing.
What are belts
300
Io is most notable for this geological formation.
What are volcanoes
300
DAILY DOUBLE. Edmond Halley predicted the return of the Halley Comet, which returned to actually have its tail pass through the Earth in this year.
What is 1910
300
p+p→[np]+e +ν
What is nuclear fusion (or proton-proton chain)
300
To measure the masses of distant stars, we are best off looking for these.
What are binary stars
300
Every massive object, like Saturn, has a special gravitational field called this
What is a Roche Limit
400
DAILY DOUBLE. This planet has a large iron core, thin atmosphere, no air pressure.
What is mercury
400
This type of very small stony rock is simply orbiting in space.
What is a Meteoroid
400
6.626 10−27 ergs s
What is Planck's constant
400
This satelite has a very high albedo and a smooth surface
What is Europa
400
Gravitational energy in Saturn is produced when this element sinks through hydrogen
What is helium
500
This NASA mission was the first to land rovers on Mars.
What are the Viking Twins
500
This type of meteor shower occurs in winter.
What are the Geminids
500
DAILY TRIPLE. Hψn=Enψn the "n"s are subscript
What is Schrödinger's Equation
500
This planet's rings are lumpy and green from atmospheric methane
What is Neptune
500
DAILY DOUBLE. Jupiter's magnetic fields emit this type of electromagnetic wave.
What are radio waves
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