Radiation astronomy/Visuals/Quiz

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This is the south polar cap of Mars as it appeared to the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) on April 17, 2000. Credit: NASA/JPL/Malin Space Science Systems (MSSS).

Visual astronomy is a lecture and an article. It has been included as part of the astronomy course on the principles of radiation astronomy.

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



Suggestion: Have the lecture available in a separate window.


Enjoy learning by doing!

Quiz[edit | edit source]


1 Complete the text:

Match up the theoretical astronomy idea with each of the possibilities below:
astronomical object - A
astronomical source - B
astronomical entity - C
star - D
interstellar medium - E
material - F
natural luminous body visible in the sky

naturally from which something comes

matter which may be shaped or manipulated

an independent, separate, or self-contained existence

the matter that exists in the space between the star systems

naturally in the sky especially at night




3 Various gaps and density minima have been observed in the Saturnian


4 The extent of the Hα absorption trough along the major axes of quenched spirals is what?

more truncated than the distribution of the Hα emission line for H I deficient galaxies
contributed to by the new stellar population
less truncated than the distribution of the Hα emission line for H I deficient galaxies
due to the quenching
disks building up from the outside in

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

6 True or False, The expanse of space that seems to be over the Earth like a dome is called heaven.


7 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

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


9 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

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

11 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

12 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

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


14 Which of the following is not a visible, natural phenomenon associated with the planet Mars?

iron oxide
the MESSENGER spacecraft
water or ice
meteorites on Earth
Olympus Mons

15 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.


16 Complete the text:

When imaged in visible light Venus appears like a gas

rather than a


17 Which of the following phenomena are associated with Venus?

separate stars, Phosphorus, the morning star, and Hesperus, the evening star
locally available carving tools
the ionosphere was observed to become elongated downstream, rather like a long-tailed comet, during a rare period of very low density solar outflow
Lucifer, literally "Light-Bringer", and Vesper
currently dormant volcanoes only on the Sun-facing side
a breathable atmosphere

18 True or False, An aurora seen from Australia may be a blue radiation source.


19 Complete the text:

Visual rays - M
Violet rays - N
Blue rays - O
Cyan rays - P
Green rays - Q
Yellow rays - R
Orange rays - S
Red rays - T


broad-band filter centered at 404 nm


thallium bromide (TlBr) crystals


18 micrometers FWHM at 490 nm



20 Yes or No, The Hubble Space Telescope currently uses the Wide Field Planetary Camera (PC-2) with its F492M filter among others for green astronomy.


21 Which of the following are green radiation astronomy phenomena associated with the Sun?

the color of the upper rim as seen from Earth
an excess brightness at or near the edge of the Sun
the iron XIV green line
neutron emission
polar coronal holes
meteor emission
changes in the line-blanketing



23 Complete the text:

Match up the letter of the spherical object with each of the possibilities below:
Sun - A
Mercury - B
Venus - C
Earth - D
Moon - E
Mars - F
Ceres - G
Jupiter - H
Callisto - I
Europa - J
Ganymede - K
Io - L
Enceladus - M
Titan - N
Uranus - O
Titania - P
Neptune - Q
Triton - R
Pluto - S
Enceladus in the Visual.jpg

Triton moon mosaic Voyager 2 (large).jpg

Io highest resolution true color.jpg

Vg1 1567237.tiff

Ceres optimized.jpg


Titania (moon) color cropped.jpg

Pluto animiert.gif

The Earth seen from Apollo 17.jpg


Moon Farside LRO.jpg


Moon Ganymede by NOAA.jpg


Two Halves of Titan.png

HI6563 fulldisk.jpg


Venus-real color.jpg

Mercury in color - Prockter07 centered.jpg


24 True or False, A professional astronomer holding a digital camera in their hands while working on the International Space Station is a primary astronomical visual source.


25 Which phenomenon are associated with cold dark matter?

unseen mass
a bubble in space
range of masses of galaxies
hot neutrinos
Einstein-de-Sitter 'flat' universe
the cosmological density parameter Ω

26 Cheomseongdae was involved in which of the following astronomies?

cosmic-ray astronomy
infrared astronomy
neutrino astronomy
visual astronomy
ultraviolet astronomy
radio astronomy

27 True or False, There is a 101-cm telescope at Bisei Astronomical Observatory.


28 Complete the text:

The 0.6m Tortugas Mountain Observatory is used to monitor the temporal changes in the

cloud deck and equatorial activity on


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


30 It is important to study the stellar populations of nearby galaxies in order to understand the processes of galaxy


Hypotheses[edit | edit source]

  1. Visual wavelengths can yield a unique view of astronomical objects.

See also[edit | edit source]

External links[edit | edit source]

{{Principles of radiation astronomy}}