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Planetary sciences is the lecture about planets and planetary systems. It is included in the course on the principles of radiation astronomy.

This is a false color image of Venus produced from a global radar view of the surface by the Magellan probe while radar imaging between 1990-1994. Credit: NASA.

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Quiz edit


1 Evidence that demonstrates that a model or idea versus a control group is feasible for planetary science is called a


2 True or False, The principal difference between a planet and a classical planet is "cultural interpretations of phenomena in the sky."


3 Which of the following is not a studied characteristic of a planet?

an orbit around a star
a hydrostatic equilibrium (nearly round) shape
has cleared the neighbourhood around its orbit
an initially fractionated elemental composition

4 "The spectrum of gaseous methane at 77 K in the 1.1-2.6 µm region [is] a benchmark for"

5 True or False, "Regarding the fixed stars, the Sun appears from Earth to revolve once a year along the ecliptic through the zodiac".


6 The Sun as a planet has what property?

it's subject to lunar eclipses
it passes once a year through the Big Dipper
its interior structure has been studied with radar
optical reflectance studies have found evidence of magnesium
it has a surface temperature of ~700 K
it is a wanderer

7 True or False, A control group may be used in planetary science to demonstrate no effect or a standard effect versus a novel effort applied to a treatment group.


8 Complete the text:

When imaged in visible light Venus appears like a gas

rather than a


9 True or False, When Venus is viewed in the ultraviolet, its color appears brownish.


10 When the Earth is viewed from space using X-ray astronomy what characteristic is readily observed?

the magnetic north pole
the Hudson Bay meteorite crater
the South Atlantic Anomaly
the Bermuda Triangle
solar positron events
electrons striking the ionosphere

11 With respect to the zodiacal light which group of middle-easterners worshipped it?

12 True or False, The libration of the Moon through at least one full moon and one new moon occurs over the period of one earth month.


13 Which of the following is not associated with tides on Earth?

the Sun and the Moon
Jupiter and Saturn
Hudson Bay
Bay of Fundy
ice ages
plate tectonics

14 True or False, Pure planetary science involves no doing apart from itself.


15 That part of outer space between planets and their star(s) is called?

16 True or False, The visible path of a meteoroid that has entered the Earth's atmosphere is called a meteorite.


17 Which of the following is not a natural phenomenon associated with the planet Mars?

iron oxide
the MESSENGER spacecraft
meteorites on Earth
Olympus Mons

18 Complete the text:

The majority of known asteroids orbit the Sun between the orbits of



19 True or False, Mars may have suffered asteroid impacts.


20 Which of the following is not a phenomenon associated with Ceres?

the smallest identified dwarf planet
Ceres is spheroidal
it is in orbit around the Sun
it appears to be in hydrostatic equilibrium
it has not cleared its neighborhood
Ceres is one of the two natural satellites of Mars

21 True or False, The purpose of a treatment group in planetary science is to describe natural processes or phenomena for the first time relative to a control group.


22 A terrestrial planet is composed primarily of?

23 True or False, Callisto's surface is uniformly colored but is not uniform in craters.


24 Observations of Io have benefited greatly from what phenomenon?

a dense, opaque atmosphere
extensive meteorite cratering
a flattening out
liquid hydrocarbon lakes
the reflected light of allotropes and compounds of sulfur

25 The atmosphere of Titan which has a natural orange color is composed largely of?

26 True or False, The astronomer Clyde Tombaugh is the discoverer of Charon.


27 Which of the following is a phenomenon associated historically with Titania?

a large, trenchlike feature
a relatively light surface
few or no canyons and scarps
very few impact craters
helium ice

28 It is one of only three objects in the Solar System known to have a nitrogen-dominated atmosphere (the others are Earth and Saturn's giant moon, Titan).

29 True or False, Triton has the coldest surface known anywhere in the Solar System.


30 Which of the following is associated with Pluto?

a dwarf planet
a member of the Oort belt
the northern polar region has brightened
the southern polar region has darkened
its overall redness has decreased
extreme axial tilt

31 One of the substances discovered in the tail by spectroscopic analysis was the toxic gas

32 True or False, Pluto is in the Kuiper belt.


33 Which of the following is characteristic of the scattered disc

a distant region of the solar system
the dwarf planet Eris
orbital eccentricites ranging up to 0.8
inclinations as high as 50°
perihelia greater than 30 AU

34 A cloud at nearly a quarter of the distance to Proxima Centauri is called the

35 True or False, The observations of planetary motion agree with computed orbits to the accuracy of the observations.


36 Which phenomenon are associated with the heliosphere?

a region of space where the interstellar medium is blown away by the solar wind
a bubble in space
virtually all the material emanates from the Sun itself
Voyager 2
Voyager 1
the termination shock

37 The point where the interstellar medium and solar wind pressures balance is called the

38 True or False, Neptune is a gas dwarf.


39 Phenomena associated with Kepler-36b?

has a gaseous surface
about 30% of its mass is iron
about 4.5 times the mass of Earth
has a rocky surface
discovered by the Kepler spacecraft
about 1.5 times as large as the Earth

40 The process of bombardment-induced surface alteration or damage is called.

41 True or False, A planet has been referred to as a moving light in the sky.


42 The Sun as a classical planet has which characteristics?

depending on latitude the Sun passes overhead every day on Earth
the size of its disc is very close to that of the Moon
it appears to revolve along the ecliptic
it is named after Sunday
Helios is the lord of the Sun
Helios is a son of Jupiter

43 On 19 May 1910, the Earth actually passed through the tail of what comet.

44 True or False, The XRS aboard the MESSENGER spacecraft maps mineral composition.


45 Venus is not known historically for which of the following?

being in orbit around the Sun in 10,000 b2k
imaged by the Magellan probe
a gas dwarf when viewed in the ultraviolet
almost as large as the Earth
may have appeared comet-like in human memory
having a high surface temperature

46 The first X-ray picture of the Earth was taken in March 1996 by what satellite?

47 True or False, Electrons in the Earth's magnetosphere are energized by neutral particles from the Sun


48 Ashen light is involved in which of the following?

glow of the bright part of the lunar disk
light from different parts of Earth are mixed together
mimics the Earth as a single dot
neutron astronomy
X-ray astronomy

49 Being outside during fair weather in the daylight looking upward when the Sun is off to the East or West, you may see that the sky is what color.

50 True or False, In the exosphere, temperature rises from around 1,500°C to 105 K.


51 Meteorites found on Earth may be from which of the following?

the Moon
the asteroid belt

52 Usually associated with clouds filling the sky, thunder and lightning, wind and what water based meteorites

53 True or False, The Earth's atmosphere is a relatively bright source of gamma rays.


54 Which geological phenomena are associated with Earth?

lava-spewing volcanoes
sulfur volcanoes
plate tectonics
water oceans
liquid methane oceans
silicate minerals

Hypotheses edit

  1. The science of planetness concerns the effects on the astronomical object from its orbiting a star, or more than one star.

See also edit

External links edit

{{History of science resources}}

{{Radiation astronomy resources}}