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253 Mathilde is a C-type asteroid measuring about 50 km across, covered in craters half that size. Credit: NEAR Shoemaker.

Wanderers is a lecture offered by the radiation astronomy department. It is included in the {{radiation astronomy resources}} template.

You are free to take this quiz based on wanderers at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the {{radiation astronomy resources}} template. This should give you adequate background to get 100 %.

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Enjoy learning by doing!

Quiz[edit | edit source]


1 True or False, There is anecdotal evidence that people had seen the Galilean moons of Jupiter before telescopes were invented.


2 Complete the text:

Match up the type of silicate with the name:
cyclosilicate - A
inosilicate - B
orthosilicate - C
sorosilicate - D
phyllosilicate - E
tectosilicate - F
structurally isolated double tetrahedra

single chain of tetrahedra

a continuous framework of tetrahedra

a ring of linked tetrahedra

a two-dimensional sheet of tetrahedra

isolated tetrahedra


3 True or False, The last "Venus transit" occurred more than a century ago, in 1882, and was used to compute the distance from the Earth to the Sun.


4 Moldavite is a mineral that may be associated with what green astronomy phenomenon?

predicting the end of the Earth
determine the accuracy of local computers
meteorite impacts
demonstrating that Venus was once a comet
predict when currently dormant volcanoes will erupt
green fireballs

5 True or False, Some objects seem to wander around in the night sky relative to many of the visual points of light.


6 Complete the text:

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



7 Yes or No, Orbital decay is the process of prolonged reduction in the altitude of a satellite's orbit.


8 Phenomena associated with some meteorites?

have a gaseous surface
long nickel-iron crystals

9 True or False, Clustered around Jupiter's orbital pole are the other planets: Venus, Earth, Mars, Saturn, Uranus and Neptune.


10 A thin-section of a meteorite that may be analyzed has which of the following?

a great many light gray and dark gray chondrules present
large grain cross sections making sizing easy
an available sizing or magnification marker
independent verification as a meteorite
correctable diameters and relative abundances
optical conditions

11 True or False, The projected time spans from the inclination integrations suggest that conditions within the solar system for the recorded data set are very stable.


12 A natural rocky source of chemicals from the sky to the ground may originate from what astronomical source?

the solar wind
the diffuse X-ray background
Mount Redoubt in Alaska
the asteroid belt
the International Space Station

13 True or False, A vertical precession describes precession of orbital axes out of and back across the ecliptic.


14 Complete the text:

Match up the form or type of quartz with the effect:
alpha quartz - A
coesite - B
cristobalite - C
stishovite - D
seifertite - E
tridymite - F
10 GPa and above 1200°C

2-3 gigapascals and 700°C

22-460°C tabular crystals

trigonal tectosilicate

35 GPa to 40 GPa orthorhombic

1470°C cubic or tetragonal form


15 Yes or No, The Sun and Helios may have been two different objects in the past.


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

the Moon
the asteroid belt

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


18 Considering that many rock types bear a striking resemblance to meteorites which are the one or few ways to differentiate a meteorite from a terrestrial rock?

the Ca/Si ratio
the Al/Si ratio
enstatite rather than diopside
oxygen isotope ratios
observed orbit and fall with verified recovery

19 True or False, Usually the wanderers are the seven classical planets, Saturn, Jupiter, the Moon, the Sun, Mercury, Mars, and Venus.


20 Yes or No, A wanderer may move in a leisurely, casual, or aimless way.


Hypotheses[edit | edit source]

  1. Wanderers may do so between the Sun and the gas giants.

See also[edit | edit source]

External links[edit | edit source]