Background astronomy/Quiz

This image depicts the two gigantic gamma-ray bubbles at the heart of the Milky Way. Credit: NASA's Goddard Space Flight Center.

Background radiation astronomy, or background astronomy is a lecture that is part of the radiation astronomy department's radiation astronomy project. It has been included since the 2016 fall version of principles of radiation astronomy as a lecture.

You are free to take this quiz based on background radiation astronomy at any time.

To improve your scores, read and study the lecture, the links contained within, listed under See also, External links, and in the {{principles of radiation astronomy}} templates. This should give you adequate background to get 100 %.

As a "learning by doing" resource, this quiz helps you to assess your knowledge and understanding of the information, and it is a quiz you may take over and over as a learning resource to improve your knowledge, understanding, test-taking skills, and your score.

Suggestion: Have the lecture available in a separate window.

To master the information and use only your memory while taking the quiz, try rewriting the information from more familiar points of view, or be creative with association.

Enjoy learning by doing!

Quiz

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

1 Yes or No, The temperature distribution of the intergalactic medium (IGM) depends on whether or not there exist strong galactic winds.

	Yes
	No

2 Which of the following are theoretical radiation astronomy phenomena associated with a satellite in orbit around the Earth?

	background radiation
	a charged particle wind which emanates out of a beam line
	gravity
	near the barycenter for the Earth-Moon system
	swirls of tan, green, blue, and white in the water
	electric arcs
	chlorophyll-containing phytoplankton aloft in the upper atmosphere

3 Yes or No, Outflow from the galaxy M82 of PAHs is embedded in a gaseous wind.

	Yes
	No

4 A cosmic ray may originate from what astronomical source?

	Jupiter
	the solar wind
	the diffuse X-ray background
	Mount Redoubt in Alaska
	the asteroid belt
	an active galactic nucleus

5 Yes or No, High energy neutrinos may interact to produce a large cascade of particles.

	Yes
	No

6 Complete the text:

Cosmic rays with energies over the energy of 5 x 1019 interact with photons to produce via the $\Delta$ resonance.

7 Yes or No, The main components of background noise in neutron detection are high-energy photons, which aren't easily eliminated by physical barriers.

	Yes
	No

8 Which of the following are astrophysical components contributing to the sky background?

	sets of point sources like faint asteroids
	a charged particle wind
	Galactic stars
	far away galaxies
	swirls of tan, green, blue, and white in the water
	dust in the Solar System
	dust in the Milky Way
	dust in intergalactic space

9 Complete the text:

A proof-of-concept structure, including a control group, consists of , procedures, findings, and .

10 Which of the following are cold dark matter gamma rays?

	expected signal comparable to background
	annihilation radiation
	a pronounced cosmic-ray halo
	difficult to separate from a dark halo
	dwarf spheroidals
	weakly interacting massless particles

11 Complete the text:

The (CIB) causes a significant attenuation for very high energy through Compton , and electron-positron pair production.

12 Which of the following are likely associated with a green emission line control group?

	rocky objects
	high peak to background
	plasma objects
	a G2V photosphere
	rotation
	watery surface
	spots

13 With respect to electromagnetic radiation, which of the following are types of backgrounds?

	cosmic optical background (COB)
	cosmic dust
	cosmic ultraviolet background (CUVB)
	cosmic X-ray background (CXB)
	cosmic cyanogen background (CCB)
	cosmic infrared background (CIB)
	rocky objects
	diffuse extragalactic background radiation
	extragalactic background light (EBL)
	CMB
	meson background
	cosmic gamma-ray background (CGB)
	cosmic radio background

Hypotheses

Main resource: Hypotheses

1. Sometimes the apparent background is actually the signal.

See also

• Blue astronomy/Quiz
• Cyan astronomy/Quiz
• Gamma-ray astronomy/Quiz
• Green astronomy/Quiz
• Infrared astronomy/Quiz
• Microwave astronomy/Quiz
• Orange astronomy/Quiz
• Radio astronomy/Quiz
• Submillimeter astronomy/Quiz
• Ultraviolet astronomy/Quiz
• Violet astronomy/Quiz
• Visual astronomy/Quiz
• X-ray astronomy/Quiz
• Yellow astronomy/Quiz

External links

{{Radiation astronomy resources}}