Regions/Astronomy/Quiz

This image of the star formation region NGC 6334 is one of the first scientific images from the ArTeMiS instrument on APEX. Credit: ArTeMiS team/Ph. André, M. Hennemann, V. Revéret et al./ESO/J. Emerson/VISTA.

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Quiz

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1 True or False, A star-forming region is a region of the celestial sphere within which predominately very young stellar objects (YSOs) are located and their formation is likely occurring.

	TRUE
	FALSE

2 VISTA is the world’s largest survey

3 Complete the text:

Ultraviolet radiation and stellar from Eta Carinae and its siblings have shredded the to pieces, leaving a mess of tendrils and .

4 Complete the text:

Match up the image with the star-forming regions:

Messier 17 - A

RCW 79 - B

Flame Nebula - C

Cone Nebula - D

NGC 1999 - E

R136 - F

HH 46/47 - G

RCW 108 - H

Carina Nebula - I

NGC 3582 - J

NGC 1097 - K

Hubble-X - L

NGC 6334 - M

Arp 220 - N

Sh 2-106 - O

Rho Ophiuchi complex - P

Ghost Head Nebula - Q

NGC 2366 - R

NGC 2363 - S

Dragonfish nebula - T

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5 True or False, NGC 346 is a star-forming cloud.

	TRUE
	FALSE

6 True or False, The Norikura Solar Observatory uses its own designations for solar active regions rather than those of other observatories or NOAA.

	TRUE
	FALSE

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

	lithium
	nucleosynthesis
	coronal clouds
	spot central meridian passage
	a surface coverage of at least 95%.

8 The Sun as a star has what geographical property?

	it's a primordial population III star
	it passes once a year across the Lockman Hole
	silicates have been discovered in its interior structure
	optical reflectance studies have found evidence of magnesium
	it has a surface temperature of ~700 K
	it has a longitude and latitude grid system for locating active regions

9 Which of the following is not a star-forming region?

	Messier 17 sky region
	RCW 79
	NGC 2024
	Local Void
	NGC 2264
	NGC 6503

10 Complete the text:

Most and originate in magnetically around visible groupings.

11 True or False, Coronal loops project into the coronal cloud, through the transition region and the chromosphere.

	TRUE
	FALSE

12 Which of the following is not a phenomenon usually associated with regions?

	a connected part of a space
	a tract of land
	definite extent
	Van Maanen's star
	temporal change in radiation flux
	weather

13 Which of the following is not a phenomenon associated with a flip-flop cycle?

	active regions
	hemisphere shifts
	binary RS CVn stars
	single stars
	cyclical period
	meridian passage

14 A Mt. Wilson spot number usually corresponds with which other region number?

15 True or False, Hale region numbers are greater for the same regions than NOAA numbers.

	TRUE
	FALSE

16 Which of the following active region phenomena have been observed on Proxima Centauri?

	flares
	temperatures as high as 27 MK
	quiescent X-ray luminosity comparable to the Sun
	a surface coverage of about 88%
	spicules
	likely prominence

17 Active regions are the result of enhanced what?

18 Which of the following are associated with the stellar active region control group?

	solar cycle
	closed magnetic structures
	solar wind
	long-lived loop arcades
	helmet streamers
	the Sun

19 Which of the following is not associated with R136?

	hundreds of brilliant blue stars
	the Milky Way
	warm, glowing clouds
	the largest stellar nursery in our local galactic neighborhood
	the 30 Doradus Nebula
	a fantasy landscape of pillars, ridges, and valleys

20 True or False, "75% of the naked sunspots represented the return of large dominant f spots which had been part of large active regions during previous rotations."

	TRUE
	FALSE

21 Which geographical phenomena are associated with stellar active regions?

	moving across the surface of the Sun or star
	manifesting intense magnetic fields
	a north geographic and magnetic pole
	rotation
	a prime meridian
	average starspot latitudes
	the solar or stellar equator

22 Complete the text:

Match up the type of radiation with each of the star-forming possibilities below:

Spitzer infrared - A

VISTA infrared - B

visual - C

XMM-Newton X-rays - D

ultraviolet - E

ESO visual - F

NGC 346 .

NGC 2024 .

HH 46/47 .

NGC 2264 .

R136

RCW 79 .

23 Coronal loops extend high into the corona, project through the chromosphere, and project through what above the photosphere?

24 True or False, Coronal loops populate both active and quiet regions of the solar surface.

	TRUE
	FALSE

25 Chemistry phenomena associated with star-forming regions are

	silicate dust
	pressure
	hydrogen molecules
	polycyclic aromatic hydrocarbons (PAHs)
	oxygen
	sulfur

26 Phenomena associated with nanoflares?

	1017 Joules
	very high X-ray emission from happening every 20 s
	flickerings
	brightenings
	mass eruptions
	active regions

27 True or False, A spotless flare may occur in a plage region during its first rotation.

	TRUE
	FALSE

28 Which stars of the alpha Centauri system are known to have stellar active regions?

	Proxima Centauri
	Alpha Centauri B
	Barnard's star
	Alpha Centauri A
	Rigel Kent
	Alpha Centauri C
	Alpha Centauri D

29 The star-forming phenomena related to RCW 79 are which of the following?

	a bubble is 70-light years in diameter
	the southern Milky Way
	the radiation and winds of hot young stars
	the hot bubble expands into the interstellar gas and dust around it
	new stars along the edge of the large bubble

See also

• Astronomy/Quiz
• Green astronomy/Quiz
• Planetary science/Quiz
• Radiation astrochemistry/Quiz
• Radiation astrogeography/Quiz
• Radiation astrohistory/Quiz
• Radiation astronomy/Quiz
• Theoretical radiation astronomy/Quiz

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