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Compact star: Quiz


Question 1: Compressing the mass forces this band to widen, creating the ________ force of electron degeneracy pressure which now holds the center of the planet apart.
Introduction to quantum mechanicsQuantum mechanicsSchrödinger equationWave–particle duality

Question 2: A somewhat wider class of compact objects is sometimes defined to contain, as well as compact stars, smaller solid objects such as planets, ________, and comets.
AsteroidKuiper beltCeres (dwarf planet)Asteroid belt

Question 3: A planet such as ________ has about the largest volume possible for a cold mass.
Callisto (moon)Io (moon)Ganymede (moon)Jupiter

Question 4: When a star has exhausted all its energy and undergoes stellar death, the gas pressure of the hot interior can no longer support the weight of the ________ and the star collapses to a denser state: a compact star.
Stellar classificationBinary starStarSupernova

Question 5: These include strange stars (composed of strange matter) and the more speculative preon stars (composed of ________).
NeutrinoPreonStandard ModelElectron

Question 6: All light will be trapped within an event horizon, and so a black hole appears truly black, except for the possibility of ________.
GravitationPhotonHawking radiationBlack hole thermodynamics

Question 7: The loss from the radiating surface is compensated by the production of energy from ________ in the interior of the star.
Fusion powerNuclear fissionAneutronic fusionNuclear fusion

Question 8: The star's radius has now shrunk to only a few thousand kilometers[2], and the mass is approaching the theoretical upper limit of the mass of a white dwarf, the ________, about 1.4 times the mass of the Sun.
Chandrasekhar limitWhite dwarfNeutron starType II supernova

Question 9: They therefore provide ________ to support a neutron star against collapse.
Fermionic condensateMatterDegenerate matterStrange matter

Question 10: In ________, the term compact star (sometimes compact object) is used to refer collectively to white dwarfs, neutron stars, other exotic dense stars, and black holes.
AstronomySunAstrophysicsTheoretical astronomy


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