This image shows how the Earth glows in the ultraviolet. Credit: NASA.

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

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Quiz

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Ignore the questions' coefficients:

1 Complete the text:

Ordinary glass is partially to UVA but is to shorter wavelengths, whereas silica or glass, depending on quality, can be even to vacuum UV wavelengths.

2 Complete the text:

The First Byurakan Survey commenced in 1965 using the telescope at the Byurakan Astrophysical Observatory. The purpose of the survey was to find galaxies with an excess.

3 Which of the following is associated with the ultraviolet?

	black light
	germicidal
	fluorescence
	Charles Stuart Bowyer
	Hα emission
	PG 1159

4 Venus is not known historically for which of the following?

	being in orbit around the Sun in 10,000 b2k
	imaged by the Magellan probe
	a gas dwarf when viewed in the ultraviolet
	almost as large as the Earth
	may have appeared comet-like in human memory
	having a high surface temperature

5 True or False, The surface of the Sun is readily imaged in the ultraviolet.

	TRUE
	FALSE

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 .

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) .

7 Yes or No, When Venus is viewed in the ultraviolet, its color appears brownish.

	Yes
	No

8 Complete the text:

The spectral region bounded on the long wavelength side by the atmospheric absorption and on the short wavelength side by the photoionization of interstellar is the ultraviolet.

9 True or False, The temperature for a lightning bolt channel has a peak emittance in the far ultraviolet.

	TRUE
	FALSE

10 Complete the text:

To measure the color index, observe the magnitude of the object successively through two different filters such as and blue (B), or blue and .

11 Complete the text:

The series is the series of transitions and resulting ultraviolet emission lines of the atoms as an electron goes from a high-energy level to an n = level.

12 Complete the text:

Match up the object viewed in the ultraviolet with its image:

Sun's chromosphere- L

calcite - M

Venus - N

Jupiter's aurora - O

Jupiter - P

Io - Q

Saturn - R

Betelgeuse - S

Mira - T

LAB-1 - U

Messier 101 - V

.

.

.

.

.

.

.

.

.

.

13 True or False, The first direct observation of waves propagating into and through the solar corona was made in 1997 with the SOHO space-borne solar observatory.

	TRUE
	FALSE

14 Which of the following radiation phenomena are associated with the ultraviolet?

	He II lines
	B I line
	Be II lines
	carbon III line
	Hβ emission
	oxygen O I lines

15 True or False, Ultraviolet observations by Mariner 10 of Mercury provided evidence for the presence of H and He in the atmosphere.

	TRUE
	FALSE

Hypotheses

1. Ultraviolet radiation can be an indicator of surface fusion above the photosphere of stars.

See also

External links

• International Astronomical Union
• NASA/IPAC Extragalactic Database - NED
• NASA's National Space Science Data Center
• The SAO/NASA Astrophysics Data System
• SDSS Quick Look tool: SkyServer
• SIMBAD Astronomical Database
• SIMBAD Web interface, Harvard alternate
• Spacecraft Query at NASA
• Universal coordinate converter

{{Radiation astronomy resources}}