Trivia Questions About Planet Neptune
What is Neptune?
A: Neptune is the eighth and farthest known
planet from the Sun in the Solar System.
In the Solar System, it is the fourth-largest
planet by what?
A: Diameter.
Neptune’s mass is how much heavier than Earths?
A: 17 times.
Neptune’s mass is slightly more massive than its
near-twin what?
A: Uranus, which is 15 times the mass of Earth
and slightly larger than Neptune.
Neptune orbits the Sun once every how often?
A: 164.8 years.
What is its average distance from the sun in
astronomical units?
A: 30.1 astronomical units.
What is Neptune named after?
A: The Roman god of the sea.
It’s astronomical symbol ♆, is a what?
A: A stylized version of the god Neptune's
trident.
Neptune is not visible to what?
A: The unaided eye.
Neptune is the only planet in the Solar System
found by what?
A: Mathematical prediction rather than by
empirical observation.
Unexpected changes in the orbit of Uranus led
Alexis Bouvard to deduce what?
A: That its orbit was subject to gravitational
perturbation by an unknown planet.
Neptune was subsequently observed with a
telescope on 23 September 1846 by whom?
A: Johann Galle within a degree of the position
predicted by Urbain Le Verrier.
The planet's distance from Earth gives it a very
small what?
A: Apparent size, making it challenging to study
with Earth-based telescopes.
Neptune was visited by what spacecraft, when it
flew by the planet on 25 August 1989?
A: Voyager 2.
Neptune's composition is similar to that of what
planet?
A: Uranus and unlike those of the larger gas
giants, Jupiter and Saturn.
Like Jupiter's and Saturn's, Neptune's
atmosphere is composed primarily of what?
A: Hydrogen and helium, along with traces of
hydrocarbons and possibly nitrogen.
Neptune’s atmosphere contains a higher
proportion of what than Jupiter or Saturn?
A: "Ices" such as water, ammonia, and methane.
Neptune’s interior, like that of Uranus, is
primarily composed of what?
A: Ices and rock.
Traces of methane in the outermost regions in
part account for the planet's what?
A: Blue appearance.
In contrast to the hazy, relatively featureless
atmosphere of Uranus, Neptune's atmosphere has
what?
A: Active and visible weather patterns.
Neptune has the strongest sustained winds of any
planet in the Solar System, with recorded wind
speeds as high as what?
A: 1,300 mph.
Because of its great distance from the Sun,
Neptune's outer atmosphere is one of the what?
A: Coldest places in the Solar System.
What is the temperature at its cloud tops?
A: Approaching −218 °C
What are the temperatures at the planet's
centre?
A: Approximately 5,100 °C.
Neptune has a faint and fragmented ring system
which was first detected during the 1960s and
confirmed by what spacecraft?
A: Voyager 2.