Planets
Solar system
Satellites
Earth's movements
Miscellany
100
The fourth planet of the solar system.
Mars
100
The star of the solar system.
The Sun
100
The phase in which the visible side of the Moon is fully illuminated.
Full moon
100
It's when the Earth’s spin around itself on an imaginary axis that runs through the planet from the North Pole to the South Pole.
Rotation
100
The the regular rise and fall of the sea level due to the gravitational pull of the Moon.
The tides
200
The smallest planet in the solar system
Mercury
200
The average distance between the Earth and the Sun.
Astronomical unit (AU)
200
It's the rotation and the orbit period.
27,3 days
200
It's the average period of the orbit.
365,25 days.
200
It's the name of the galaxy where the Sun is.
Milky way
300
Those that are large,made of gas and have rings. They rotate quickly.
Outer planets
300
Those that don't have enough mass to clean their orbits.
Dwarf planets
300
It's this moon's phase.
First quarter
300
It's the number of daylight hours at the South Pole during its summer.
24 hours.
300
It's a bunch of galaxies grouped together
Cluster
400
The plane in which all the slightly elliptical planets' orbits lying on.
Ecliptic (plane)
400
The celestial bodies made up of rock and ice, dust and gases.
Comets
400
The Mars' satellites
Phobos and Deimos
400
It's the season in the north hemisphere.
Winter
400
It's the moon's phase when you can see a solar eclipse.
New moon.
500
The planet that spins/rotates in a clockwise direction. It's near from the Earth.
Venus.
500
It's a celestial body whose name begins with H and is in the Kuiper belt.
Haumea
500
The planets without satellites.
Mercury and Venus
500
It is the season in which the days begin to be longer than the nights.
Spring
500
It's the speed of the light.
300.000 km/s