The visual image shows the natural cyan color of planetary nebula NGC 7048. Credit: Aladin from CDS.

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

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## Quiz

1

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

2

One of the substances discovered in the tail of Halley's comet by spectroscopic analysis is the toxic gas

3

Which of the following is not a prominent contributor associated with the bluish color of water on Earth?

 the blue sky chlorophyll dissolved organic matter cyanobacteria decomposition processes from dead organic matter such as plants highly organic soils

4

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

 Yes No

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 . F547M . F675W . broad-band filter centered at 404 nm . F588N . thallium bromide (TlBr) crystals . F606W . 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.

 TRUE FALSE

7

Cyan astronomy observation is performed all around the surface of the Earth by?

8

True or False, The red shift cannot affect cyan stars.

 TRUE FALSE

9

Which of the following is not a cyan characteristic of solar active regions?

 iron yellow spectral lines are 1.4 % shallower at solar maximum coronal clouds spot central meridian passage a surface coverage of at least 95%.

10

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

 TRUE FALSE

11

Which of the following is involved in planetary astronomy more so than planetary science?

 the occurrence of cyan rock types on the surface of rocky objects the Earth and other rocky objects have a cyan mineral containing mantle checking equations about complex systems the advantages of a 490 nm band pass digging holes in the surface of the Moon surface temperatures low enough to produce methane lakes

12

True or False, Cyan Bremsstrahlung radiation is not detected from the Sun because the photosphere isn't ionized enough to produce it.

 TRUE FALSE

13

Various cyan radiation observatories occur at different altitudes and geographic locations due to what effect?

 the presence of oceans on the Earth locally available carving tools light pollution most astronomical objects are observed at night currently dormant volcanoes seldom erupt human habitation increases near an astronomical observatory

14

True or False, In the first derivative of Planck's equation to generate a wavelength, temperature pair like (495 nm, 6100 K), the constant c2 has units of nm K.

 TRUE FALSE

15

Using the equation ${\displaystyle {\frac {c2}{\lambda T}}{\frac {1}{e^{\frac {c2}{\lambda T}}-1}}e^{\frac {c2}{\lambda T}}-5=0}$ what temperature corresponds approximately to a Planckian peak wavelength of 476 nm (Use c2 = 1.438833 cm K.)?

 6440 K 6300 K 5170 K 6100 K 5870 K 6250 K

16

True or False, The Hubble Space Telescope currently uses the Wide Field Planetary Camera (PC-2) with its F492M filter among others for green astronomy.

 TRUE FALSE

17

Observations of comets have benefited greatly from what phenomenon of cyan astronomy?

 Cherenkov radiation the electric blue glow of lightning gas-expansion velocity decreases with increasing heliocentric distance methane possesses prominent absorption bands in the visible adaptive optics the light of the neutral CN-radical

18

True or False, The Hβ emission line does not appear when the F492M filter is used on the Hubble Space Telescope because its wavelength is 486.1 nm.

 TRUE FALSE

19

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

20

True or False, There are cyan or cyan mineral containing meteorites.

 TRUE FALSE

21

Complete the text:

 Methane possesses prominent in the visible and near-infrared (IR) making aquamarine or in color.

22

A cyan color can result from a freshly excavated high-Ti?

23

True or False, A dominant group in cyan astronomy differs from a control group in that it rules the treatment of the control group.

 TRUE FALSE

24

Evidence that demonstrates that a model or idea in cyan astronomy versus a control group is feasible is called a

 .

25

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

 TRUE FALSE

26

Complete the text:

 A short or realization of a certain or idea to a treament's feasibility in cyan astronomy is called a proof of .

27

True or False, Pure cyan astronomy involves no doing apart from itself.

 TRUE FALSE

28

Complete the text:

 A proof-of-concept structure, including a control group, consists of , procedures, findings, and .

29

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

 TRUE FALSE

## Hypotheses

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