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Astronomy General Quiz (Pretty Hard)

Make sure to include units for correct answer. Good luck!
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M4tt23
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Last updated: May 23, 2022
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First submittedMay 23, 2022
Times taken104
Average score26.7%
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Hint
Answer
Betelgeuse and Rigel are both in this constellation?
Orion
Which star cluster "embodies" the seven daughters of Greek titan Atlas?
Pleiades/Seven Sisters
Variable hypergiant with a radius equal to 1,700 solar radii, the largest known star in the universe.
UY Scuti
The most massive star ever discovered, found in the Tarantula Nebula, part of the Large Magellanic Cloud, with a mass of approximately 300 solar masses.
RMC 136a1/R136a1
The first quasar ever discovered.
3C273
Wavelength of electromagnetic radiation emitted by hyperfine splitting of Hydrogen.
21cm
Mean absolute temperature of the Cosmic Microwave Background.
2.7K
Most common shape of astronomical orbits.
Elliptical
Natural spherical asteroid "cloud" within which our solar system is theorised to exist, left over after the collapse of our own stellar nebula.
Oort
Pluto was the first of this type of object found in 1930.
Trans-Neptunian
Fastest ever man-made object and the first to officially "touch" the sun.
Parker Solar Probe
Distance in light years between the sun and Proxima Centauri, the next nearest star.
4.2
The name of the radius inside which a specified mass would form a black hole.
Schwarzschild
The name for the time taken for our solar system (sun) to orbit the Milky Way galaxy.
Galactic Year/Cosmic Year
The name of the orbital limit within which the tidal effects of a large body on a smaller body will begin to tear apart the latter.
Roche
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1 Comments
eutaxy
+1
Level 57
Jan 6, 2025
I like this quiz. It is hard, and I learned a few things.

But I think some minor improvements are in order:

- "ellipse" should be correct as well as "Elliptical".

- *You* should specify the units you want, rather than expecting them in the answer. Note that neither "21 centimeters" nor "210 mm" nor "2700 millikelvin" are accepted. The question specifying light years shows the better way to do it.

- You should specify that you want *exactly* 2 significant digits. Note, for example, that "21.1 cm" is not accepted even though it is more accurate.

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