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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[edit | edit source]


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.


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
Rho Ophiuchi.jpg



Cone Nebula (NGC 2264) Star-Forming Pillar of Gas and Dust.jpg


Wide Field Imager view of the star formation region NGC 3582.jpg

Star-forming region S106 (captured by the Hubble Space Telescope).tif

Wide-field view of the star-forming region around the Herbig-Haro object HH 46 47.jpg

Messier 17.jpg

Hubble Interacting Galaxy Arp 220 (2008-04-24).jpg

Small Section of the Carina Nebula.jpg

Grand star-forming region R136 in NGC 2070 (captured by the Hubble Space Telescope).jpg

Glowing Gas Cloud in the Star-Forming Region of Galaxy NGC 6822 (Hubble).jpg

Spectacular star-forming region known as the Flame Nebula, or NGC 2024.jpg

Hubble view of NGC 2366 - Heic1207a.jpg


Star-forming Region RCW 108 in Ara.jpg

Star-Forming "Bubble" RCW 79.jpg


The star-forming Cat’s Paw Nebula through ArTeMiS’s eyes.jpg


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


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


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

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:



originate in magnetically

around visible


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


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

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.


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

temperatures as high as 27 MK
quiescent X-ray luminosity comparable to the Sun
a surface coverage of about 88%
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."


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
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


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.


25 Chemistry phenomena associated with star-forming regions are

silicate dust
hydrogen molecules
polycyclic aromatic hydrocarbons (PAHs)

26 Phenomena associated with nanoflares?

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

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


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[edit | edit source]

External links[edit | edit source]