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Space Quiz A-Z

All about outer space
Quiz by
GeoDude220
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Last updated: April 14, 2026
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First submittedApril 14, 2026
Times taken19
Average score61.5%
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Hint
Answer
A) The distance from the Sun
to the Earth, measured in AU
Astronomical Unit
B) Giant space of dense gravity
at the center of the solar system
Black Hole
C) The formed groups of stars in a collective area,
often named for mythical animals
Constellation
D) A invisible type of matter that holds the
galaxies together as a glue
Dark Matter
E) Event that occurs when the moon blocks the
light of the Sun
Eclipse
F) Also called a meteor, a rock that burns up
in the Earths atmosphere
Falling Star
G) Famous astronomer who discovered the
moons of Jupiter
Galileo Galilei
H) The most abundant element in the universe
Hydrogen
I) Charged region of the Earths upper atmosphere
Ionosphere
J) Term used for the 4 major planets of the
Solar system
Jovian
K) Donut shaped region of dwarf planets
beyond Neptune that includes Pluto
Kuiper Belt
L) measure of the total amount of energy radiated
by a star or other celestial object per second
Luminosity
M) The closest planet to the Sun
Mercury
Hint
Answer
N) A giant, interstellar gas cloud
Nebula
O) Constellation of 3 stars that form a belt shape
in the night sky
Orion
P) The 4th phase of matter of which the Sun
is made of
Plasma
Q) The luminous, energetic cores of distant galaxies
powered by supermassive black holes actively consuming matter
Quasar
R) A dying star in the final stages of evolution, the Sun will
become one in 5 billion years
Red Giant
S) The massive explosion of a star that ejects all mass
Supernova
T) The largest moon of Saturn
Titan
U) Giant planet that spins on a side axis in a 98 degree angle
Uranus
V) Inner planet that spins in retrograde
Venus
W) Phase of the moon between half and full
Waxing Gibbous
X) High energy, charged particles. Used in medical imaging
X Ray
Y) Type of star the sun is currently in
Yellow Dwarf
Z) The point in the sky directly above a viewer
Zenith
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