< Stars‎ | Cyans

Cyan stars is a lecture from the radiation astronomy department courses on stars.

This is an optical image in the visual range of Theta Ursae Majoris. It is listed in SIMBAD as an F7V spectral type star with a parallax of 74.19 mas. Credit: Aladin at SIMBAD.

You are free to take this quiz based on cyan stars 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 {{stars resources}} template. This should give you adequate background to get 100 %.

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Enjoy learning by doing!

Quiz edit


1 NGC 1679 is a spiral galaxy located two degrees south of Zeta?

2 True or False, Beryllium has an emission line in the cyan.


3 Soil samples from the mare of the Moon reflect primarily cyan due to the presence in the soils of what?

4 Yes or No, Boron has an emission line in the cyan.


5 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)


6 True or False, Hydrogen has an emission line in the cyan.


7 Complete the text:

Methane possesses prominent

in the visible and near-infrared (IR) making

aquamarine or

in color.

8 Cyanogen is a natural poisonous gas composed of what likely source of cyan?


True or False, This is the appearance of the Sun in visual radiation centered in the yellow-green.


10 Helium has emission lines in which of the following colors?


Hypotheses edit

  1. Quiz questions about cyan should also include bluish-green, greenish-blue, green-blue, or blue-green.

See also edit

External links edit

{{Radiation astronomy resources}}