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Stars/Sirius/Quiz

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Sirius is a lecture about the star Sirius.

This ground-based image was taken by Japanese amateur astronomer Akira Fujii and shows a close-up of Sirius. Credit: Akira Fujii.{{free media}}

You are free to take this quiz based on Sirius at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the {{stars resources}} template. This should give you adequate background to get 100 %.

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Enjoy learning by doing!

Quiz

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1 Complete the text:

Match up the star with the constellation:
Capella - A
Sirius - B
Deneb - C
Anser - D
Altair - E
Vega - F
Vulpecula

.
Canis Major

.
Lyra

.
Cygnus

.
Aquila

.
Auriga

.

2 True or False, From only its X-ray properties, Vega is a Sirius-like X-ray source.

TRUE
FALSE

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

Sirius A
Vega
Bellatrix
Deneb
Altair
Fomalhaut

4 True or False, From only its X-ray properties, Betelgeuse is a Sirius-like X-ray source.

TRUE
FALSE

5 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

6 True or False, Sirius is a likely first red source in Canis Major.

TRUE
FALSE

7 Complete the text:

Match up the observation with the binary star:
Sirius A and B - A
Algol A and B - B
Albireo - C
WISE J1049-5319 - D
Mizar A - E
Minkowski 2-9 - F
File:New-binary-star-third-closest-to-sun-3.jpg

.
 

.
 

.
 

.
File:MizarA npoi big.gif
 

.

8 Which of the following is not a stellar source?

Betelgeuse
Mercury
Regulus
Mira
Sirius B
Vega

9 Complete the text:

Sirius A has a surface temperature of approximately

, is spectral type

, has an orbital period with Sirius B of about

, and is

a variable star.

10 True or False, Around 150 AD, the Hellenistic astronomer Claudius Ptolemy described Sirius as reddish, along with five other stars, Betelgeuse, Antares, Aldebaran, Arcturus and Pollux, all of which are clearly of orange or red hue.

TRUE
FALSE


Hypotheses

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Main resource: Hypotheses
  1. The current metallicity of a star may depend on the presence of coronal clouds.

See also

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{{Radiation astronomy resources}}

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