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Astronomy A-Z

Can you answer these facts Astronomy facts a-z?
Quiz by
friedsquirrel
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Last updated: July 6, 2025
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First submittedMarch 18, 2021
Times taken242
Average score46.2%
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Letter
Question
Answer
A
Another Name For The Reflectivity Of A Planet
Albedo
B
Well Known Asterism
Big Dipper
C
Dwarf Planet
Ceres
D
A Design Of A Telescope Developed By American Astronomer John Dosbon
Dobsonian
E
Planet We Live On
Earth
F
Famous Launch Vehicle Manufactured By SpaceX
Falcon 9
G
Name of Jupiter's Largest Moon
Ganymede
H
Elements That Make Up Outer Space (Name Either One)
Hydrogen | Helium
I
A Galaxy Called (Answer) Because Of No Obvious Structure or Shape
Irregular
J
Largest Planet In Solar System
Jupiter
K
Unit of Temperature
Kelvin
L
A type of galaxy that resembles a lens or a flattened disk
Lenticular
M
Planet Closest To Star Planets Orbit
Mercury
N
Acronym for American Space Agency
NASA
O
A Double Star In Which There Is No Physical Connection Between The Stars
Optical Pair
P
Dwarf Planet That Used To Be Actual Planet
Pluto
Q
Energy Source
Quasar | QSO | Quasi Stellar Object
R
The Ability Of Instruments To Separate Two Close Features
Resoluton
S
Hot, Humongous Star All Planets Orbit
Sun
T
A Glassy Pebble Showing Signs Of Atmospheric Ablation
Tektlte
U
Central And Darkest Part Of Shadows
Umbra
V
Two Regions Within The Earth's Magnetosphere Where Energetic Charged Particles Are Trapped
Van Alien Belts
W
A Parameter Used to Estimate Strength Of Sunspot Activity
Wolf Number
X
Electromagnetic Radiation With a Wavelength Between About 0.0lnm To 10nm
X-Ray
Y
Period of Earth's Orbit around the Sun or the Sun around the Sky
Year
Z
Point Of Sky When Directly Overhead (Opposite of Nadir)
Zenith
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11 Comments
Shadywyvern
+1
Level 85
Mar 18, 2021
Should be "Van Allen Belts", "resolution" and "tektite"

Good quiz!

QuizBoy786
+1
Level 53
Mar 18, 2021
Cool Quiz!
FacterLiger0804
+1
Level 40
Mar 18, 2021
Isn't kelvin a unit of temperature?
cathlete
+1
Level 78
Mar 19, 2021
I could be wrong, but I’m quite certain Jupiter is not the largest planet in the Milky Way by a long shot. It’s definitely the biggest in our solar system, but not our galaxy.
friedsquirrel
+1
Level 58
May 23, 2025
im 4 years late to reply, bit i've fixed the question
hectorprin
+2
Level 56
Dec 1, 2021
hydrogen and helium don't make up 'outer space' which is a vacuum. they are just the most plentiful elements in the universe.
friedsquirrel
+1
Level 58
May 23, 2025
thanks
DesertVaquita
+1
Level 23
May 21, 2025
a neutron is not a lepton, it is a baryon
friedsquirrel
+1
Level 58
May 23, 2025
thanks and sorry about that, i've changed the question
howdiditend13
+1
Level 46
Jul 6, 2025
The 'Big Dipper' is not a constellation but an asterism in the constellation of Ursa Major
friedsquirrel
+1
Level 58
Jul 6, 2025
fixed, thanks
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