Sun is a lecture and an article about an entity, source, and/or object observed on or near the surface of the Sun with radiation astronomy.
You are free to take this quiz based on the Sun. Once you've read and studied it, the links contained within, and listed under See also, you should have adequate background to score 100 %.
Enjoy learning by doing!
1 Which of the following are radiation astronomy phenomena associated with the Sun?
2 True or False, The Norikura Solar Observatory uses its own designations for solar active regions rather than those of other observatories or NOAA.
3 Which of the following is not a characteristic of solar active regions?
4 During the late 1600s the sunspot cycle lost its usual intensity and became what?
5 True or False, Naked sunspots seen in Hα which are devoid of plage are never associated with coronal holes.
6 The Sun as a star has what geographical property?
7 Complete the text:
8 True or False, Any small luminous 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 a galaxy.
9 When faculae are present, what characteristics are readily observed?
10 In each latitudinal hemisphere for the greater part of the sunspot period there is practically but one what?
11 True or False, At least in emission sodium astronomy, Mercury is a dwarf gaseous object.
12 Which of the following is not a prominent feature associated with solar clouds?
13 In general there is no proper motion at all in the plage or the surrounding?
14 True or False, "Some prominences break apart and give rise to coronal mass ejections."
15 Which of the following is not a phenomenon usually associated with sunspots?
16 Complete the text:
17 True or False, In 1947, G. E. Kron proposed that starspots were the reason for periodic changes in brightness on blue dwarfs.
18 Which of the following is not a phenomenon associated with a flip-flop cycle?
19 A Mt. Wilson spot number usually corresponds with which other region number?
20 True or False, Hale region numbers are greater for the same regions than NOAA numbers.
21 Which of the following sunspot phenomena are associated with the Maunder minimum?
22 Solar observation is performed all around the surface of the Earth by?
23 True or False, The Kodaikanal Solar Observatory is a solar observatory owned and operated by the Indian Institute of Astrophysics.
24 Which of the following are phenomena usually associated with a heliostat?
25 Naked spots are long-lived and show rotation rates close to what?
26 True or False, Helicity (H) is a quantitative measure of the chiral properties of the structures observed in the solar atmosphere.
27 Which of the following are associated with the Sun control group?
28 The relative abundances of solar cosmic rays reflect those of the solar
29 True or False, The surface of the Sun is a known source of neutrons.
30 Which of the following are characteristic of solar proton astronomy?
31 Using a coordinate system, sunspot passage is generally noted by what meridian?
32 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."
33 Which geographical phenomena are associated with sunspots?
34 Neutrinos detected from the solar octant may be from nucleosynthesis within the coronal cloud in the near vicinity of the Sun or perhaps from nucleosynthesis occurring within what theoretical interior structure of the Sun?
35 True or False, X-ray photons can be effectively backscattered by photosphere atoms and electrons.
36 Phenomena associated with the color index?
37 The Na I green lines at 568.2 and 568.8 nm arise in the what?
38 True or False, Stars of spectral classes F and G, such as our sun, have color temperatures that make them look "greenish".
39 Which of the following are photospheric observatories on Earth?
40 Sayan Observatory is located in.
41 True or False, Some observed properties of the Sun still defy explanation, such as the degree of Li depletion: the solar Li abundance is roughly a factor of 200 below the meteoritic abundance.
42 Which of the following are associated with the McMath-Pierce Solar Telescope?
43 The metallicity is often expressed as "[Fe/H]", which represents the what of the ratio?
44 True or False, Heliognosy is the composition of the Sun.
45 Which of the following observatories are solar observatories?
46 About one third of ejecta observed by satellites at Earth is composed of what?
47 True or False, A spotless flare may occur in a plage region during its first rotation.
48 Which of the following are solar observatory satellites?
49 Suborbital solar probing may be accomplished from different geographical locations using?
50 True or False, The Mauna Kea Observatories are used for scientific research across the electromagnetic spectrum from visible light to radio, and comprise the largest such facility in the world.
51 Which series of emission lines from hydrogen occur in the visible spectrum of the Sun?
52 True or False, Helium does not occur in the photosphere because it was first detected during a solar eclipse.
53 Which of the following phenomena are associated with the core of the Sun?
54 True or False, Heliography is the geography of the Sun.
55 Which of the following are green radiation astronomy phenomena associated with the Sun?
56 True or False, The Sun has a net positive charge on its surface.
57 True or False, The Hβ emission line does not appear when the F492M filter is used on the Hubble Space Telescope because its wavelength is 486.1 nm.
{{Astronomy resources}} {{History of science resources}}