Radiation astronomy/Violets/Quiz

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This is a colour-composite of the barred spiral galaxy NGC 5584. Credit: ESO: observations by Susana Randall, Claudio Melo, Swetlana Hubrig; day astronomer Dominique Naef; Henri Boffin (ESO) processed the data and made the colour-composite, and Haennes Heyer (ESO) made the final adjustments.

Violet astronomy is a lecture and an article as part of the department of astronomy course on the principles of radiation astronomy.

You are free to take this quiz based on violet astronomy 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 {{principles of radiation astronomy}} template. This should give you adequate background to get 100 %.

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Quiz[edit | edit source]


1 Complete the text:

Match up the violet or violet containing image with the object letter:
Sun - A
Venus - B
Earth - C
Moon - D
Mars - E
Jupiter - F
Ganymede - G
Io - H
Saturn - I
Dione - J
Titan - K
Uranus - L
Ariel - M
Miranda - N
Triton - O
Eta Carinae - P
NGC 5584 - Q

Titan's Halo PIA07774.jpg

Triton's Cryovulcan.jpg

Dione color.jpg

Voyager 2 - Saturn - 3115 7854 2.png

Mars violet sky.jpg


Vg1 1567237.tiff

Eta Carinae.jpg

PIA00072 Venus Cloud Patterns - colorized and filtered.jpg

Iosurface gal.jpg

Uranus rings.png

Moon1 gal big.gif


Clements Mountain NPS.jpg

Blueberrysun friedman 1296.jpg

Ariel color PIA00041.jpg


2 True or False, Violet astronomy is the radiation astronomy over the wavelength band 380-450 nm.


3 Which of the following are radiation astronomy phenomena associated with the rocky-object Io?

surface regions reflecting or emitting violet or purple
an excess brightness at or near the edge
red regions that may be phosphorus
neutron emission
polar coronal holes
meteor emission

4 Yes or No, There are violet or violet mineral containing meteorites.


5 Which of the following is not a phenomenon associated with violet astronomy?

photographs of the planet Venus taken in 1927
the purple haze within a few arcseconds of the central star of the Homunculus
the faintness of carbon stars
the stellar abundance of aluminum
adaptive optics
the helium beta line

6 Complete the text:

Match up the radiation letter with each of the detector possibilities below:
Optical rays - L
Visual rays - M
Violet rays - N
Blue rays - O
Cyan rays - P
Green rays - Q
Yellow rays - R
Orange rays - S
Red rays - T
multialkali (Na-K-Sb-Cs) photocathode materials



broad-band filter centered at 404 nm


thallium bromide (TlBr) crystals


18 micrometers FWHM at 490 nm

wide-gap II-VI semiconductor ZnO doped with Co2+ (Zn1-xCoxO)


7 Purpurite is a natural mineral pigment composed of what likely source of violet or purple?

8 Complete the text:

Match up the radiation type with the satellite:
meteor - A
cosmic ray - B
neutral atoms - C
neutron - D
proton - E
electron - F
positron - G
neutrino - H
gamma ray - I
X-ray - J
ultraviolet - K
optical - L
visual - M
violet - N
blue - O
cyan - P
green - Q
yellow - R
orange - S
red - T
infrared - U
submillimeter - V
microwave - W
radio - X
radar - Y
superluminal - Z
JUNO - PIA13746.jpg

RAE B.jpg

Chandra-spacecraft labeled-en.jpg

Alpha Magnetic Spectrometer - 02.jpg


GLAST on the payload attach fitting.jpg



IBEX spacecraft.jpg

STEREO spacecraft.gif


Aquarius SAC-D satellite.png

STS-134 International Space Station after undocking.jpg

Micrometeoroid hole.jpg



FUSE prelaunch crop.jpg

Swas 1.jpg

2001 mars odyssey wizja.jpg

Spitzer space telescope pre-launch.jpg

TERRA am1.jpg

Galileo Energetic Particles Detector.jpg


Pioneer 10 on its kickmotor.jpg

Mariner 10.jpg



9 Why is much of the surface of Mars covered with red iron oxide dust when the rocks that compose much of its surface are blue or violet?

Mars has been systematically bombarded with small iron-nickel meteorites or micrometeorites that oxidize in its atmosphere
Mars has been frequently bombarded with hematite containing micrometeorites
asteroid impacts on Mars may have forced iron from near its core into the atmosphere and onto the surface as hematite dust that oxidized
Mars is like Earth in surface hematite composition, but Earth has much more water
precipitation from iron-rich water

10 Complete the text:

Match up the radiation object with the likely source:
Crmo volcanic bomb 20070516123632.jpg
- L
Circinus X-1.jpg
- M
Moon egret.jpg
- N
Neusun1 superk1.jpg
- O
Earth in ultraviolet from the Moon (S72-40821).jpg
- P
PIA00072 Venus Cloud Patterns - colorized and filtered.jpg
- Q
Io Color Eclipse Movie - PIA03450.gif
- R
NGC 7048.jpg
- S
HST NGC 5728 -O III- emission-line image.jpg
- T
a Craters of the Moon volcano

violet image of Venus

active galactic nuclear region of NGC 5728

cosmic-ray bombardment of the Moon's surface

blue lights from Io

neutrino profile of the solar octant

planetary nebula NGC 7048

ultraviolet image of the Earth

a neutron star in a binary system


Hypotheses[edit | edit source]

  1. Violet radiation yields clues through clouds of what's beneath.

See also[edit | edit source]

External links[edit | edit source]

{{Radiation astronomy resources}}{{Principles of radiation astronomy}}