Stars/Blues/Quiz

The Hubble Space Telescope image shows four high-velocity, runaway stars plowing through their local interstellar medium. Credit: NASA - Hubble's Advanced Camera for Surveys.

Blue stars is a lecture from the radiation astronomy department for the star courses.

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Quiz

Point added for a correct answer:
Points for an incorrect answer:
Ignore the questions' coefficients:

1 True or False, In 1947, G. E. Kron proposed that starspots were the reason for periodic changes in brightness on blue dwarfs.

	TRUE
	FALSE

2 Phenomena associated with the color index?

	a simple numerical expression
	the magnitude of an object
	a set of passbands or filters
	brightenings
	UBVRI filters
	particular combinations of glass filters and photomultiplier tubes

3 True or False, Hydrogen has an emission line in the blue.

	TRUE
	FALSE

4 Which of the following are radiation astronomy phenomena associated with a star?

	ultraviolet emission
	X-ray emission
	gamma-ray emission
	neutron emission
	7Be emission
	meteor emission

5 Yes or No, Helium has an emission line in the blue.

	Yes
	No

6 Which series of emission lines from hydrogen often occur in the visible spectrum of a star?

	Paschen series
	Brackett series
	Pfund series
	Lyman series
	Humphreys series
	Rydberg series
	Balmer series

7 True or False, Lithium has an emission line in the blue.

	TRUE
	FALSE

8 Which of the following is not a spectral class B star?

	Spica
	Tau Canis Majoris
	Bellatrix
	Rigel
	Regulus
	Achernar

9 True or False, An O class star is not hot enough on the surface of its photosphere to emit X-rays.

	TRUE
	FALSE

10 Which of the following is not a spectral class A star?

	Sirius A
	Vega
	Bellatrix
	Deneb
	Altair
	Fomalhaut

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

	TRUE
	FALSE

12

What is the blue-radiation source [hint: planet] in the image at right?

13 True or False, Boron has an emission line in the blue.

	TRUE
	FALSE

14 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

15 True or False, To date, all of the reported hypervelocity stars (HVSs), which are believed to be ejected from the Galactic center, are blue.

	TRUE
	FALSE

16 Which of the following is not a spectral class O star?

	Alpha Camelopardalis
	Tau Canis Majoris
	Plaskett's star
	Sirius A
	Pistol Star
	Zeta Puppis

17 True or False, Carbon has an emission line in the blue.

	TRUE
	FALSE

18 Which of the following are characteristic of interstellar extinction?

	redder color indices
	closer stars more affected
	color excess
	observed color index minus intrinsic color index
	red shift
	blue shift

19 True or False, The red shift cannot affect blue stars.

	TRUE
	FALSE

20 True or False, Nitrogen has an emission line in the blue.

	TRUE
	FALSE

21 Which of the following are theoretical radiation astronomy phenomena associated with the Earth?

	a core which emits neutrinos
	a charged particle wind which emanates out the polar ionosphere holes
	gravity
	near the barycenter for the Earth-Moon system
	the swirls of tan, green, blue, and white are most likely sediment in the water
	coronal clouds
	chlorophyll-containing phytoplankton aloft in the upper atmosphere

22 True or False, Oxygen has an emission line in the blue.

	TRUE
	FALSE

23 Which of the following are radiation astronomy phenomena associated with the gaseous-object Neptune?

	Voyager 2
	blue rays
	clouds
	neutron emission
	polar coronal holes
	meteor emission
	rotation

24 True or False, Fluorine has an emission line in the blue.

	TRUE
	FALSE

25 True or False, Neon has an emission line in the blue.

	TRUE
	FALSE

26 Which of the following are theoretical radiation astronomy phenomena associated with a wanderer?

	possible orbits
	a charged particle wind
	gravity
	near the barycenter of its system
	swirls of tan, green, blue, and white in the liquid methane
	electric arcs
	chlorophyll-containing phytoplankton aloft in an upper atmosphere

27 Complete the text:

Match up the blue object with the possibilities below:

Sun - H

Mercury - I

Venus - J

Earth - K

Meteorite on Mars - L

Pallas - M

Comet Holmes - N

Europa - O

Io - P

Saturn - Q

Enceladus - R

Tethys - S

Titan - T

Neptune - U

Abell 370 - V

SN 1987A - W

Crab Nebula - X

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28 True or False, Any small luminous blue dot appearing in the cloudless portion of the night sky, especially with a fixed location relative to other such dots is most likely to be an active galactic nucleus.

	TRUE
	FALSE

Hypotheses

Main article: Hypotheses

1. Blue astronomy of blue stars captures unique events not available at other wavelength bands.

See also

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

{{Radiation astronomy resources}}