The type of star that does not currently exist because our universe is not old enough is a a. red dwarf. b. white dwarf. c. brown dwarf. d. black dwarf.
Q: Of the following objects, the one that produces the least energy is a a. supernova. b. Type 1…
A: Answer:- Option (a) correct. Supernova.
Q: Absolute visual magnitude is a. the apparent magnitude of a star observed from Earth. b. the…
A:
Q: Which of the following is least reasonable regarding novae and supernovae? Group of answer choices…
A:
Q: As a white dwarf cools, its radius will not change because a. pressure resulting from nuclear…
A: White dwarf is one of forms of a star in its life span. Whenever a star exhaust of its fuel, it…
Q: require(s) that a young hot star (T ≥ 25,000 K) be relatively nearby.
A: Correct answer is Emission nebula
Q: If a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a a.…
A: If a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a white…
Q: A star is observed with a surface temperature of 3,000 K and a luminosity of 100,000 solar…
A: Given , Temperature = 3000 K Solar Luminosity = 100,000 Now , mass and luminosity are related by…
Q: A group of graduate students, bored during a cloudy night at a the observatory, begin to make bets…
A:
Q: 2. An unknown star is 2.40 parsec away from the sun, calculate the a) parallax b) distance in…
A: The distance between the unknown star and the sun is given as, d=2.40 parsec. TO DETERMINE: (a)…
Q: 1. A helium flash a. is sudden and powerful. b. destroys the star. c. is a slow expulsion of helium…
A: A very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the…
Q: The period–luminosity relation is useful in determining a. the mass of a star for which the…
A: Period-luminosity relation :- According to this…
Q: What is the lifetime on the main sequence of a 2-solar-mass star? a. 1.8 × 1011 years b.…
A:
Q: Star X has an apparent magnitude of 0.03 and an absolute magnitude of 0.6. If it were moved to be…
A:
Q: Which star in the table below has the greatest diameter? Star Name d (parsecs) Parallax…
A: d. 58 Ori
Q: Brown dwarfs are ____. a. stars with a very thick dust sphere around them, so they appear “brown”…
A: Required : Correct option.
Q: Which main-sequence star would be the least luminous? a. A b. B c. F d. G e. K
A: Answer:) option(a) A alpha century A is least luminous because its absolute magnitude (+4.4) which…
Q: Suppose you observe a tight eclipsing binary with orbital period of 3 days, and radial velocity…
A: 1. Suppose you observe a tight eclipsing binary with orbital period of 3 days, and radial velocity…
Q: Which star in the table below has the least surface temperature? Star Name d (parsecs) Parallax…
A: Since, distance of the star in terms of Parallax is, d=1parallax (in arc-sec)parsecs Now from…
Q: Stars that contract the quickest to land on the zero-age main sequence on the H–R diagram a. are…
A: Zero Age Main Sequence (ZAMS) is the time when a star first joins the main sequence on the…
Q: Of the following types of stars, the one that has never been and can never be a giant star is a a.…
A: a. Red dwarf stars
Q: Which of these is NOT used as a spiral tracer? a. O stars b. B stars c. young open clusters…
A: Spiral tracers are objects that are commonly found in spiral arms and soare used to trace spiral…
Q: Which main-sequence star would be the least luminous? a. G1 b. G5 c. G9 d. F0 e. F3
A: Given:Which main-sequence star would be the least luminous.Now, Main sequence stars (V) Spectral…
Q: . The spectrum of Star A peaks at 700 nm. The spectrum of Star B peaks at 470 nm. We know nothing…
A:
Q: A turnoff point corresponding to the oldest star cluster would occur at what spectral…
A: Turnoff point in HR diagram is the point where the star leaves the main sequence branch
Q: An explosive, although nondestructive, event on the surface of a white dwarf that is part of a…
A: d. nova
Q: What triggers the nucleus of a galaxy into activity? a. a nova explosion b. a type I supernova…
A: (e) none of above
Q: Objects in binary systems consist of a neutron star accumulating material from another star on its…
A: Answer:b) X-ray bursters. X-ray bursters are basically are one class of X-ray binary stars…
Q: If the Hubble constant equals 70 km/s/Mpc, the age of the universe roughly equals a. 6 billion…
A: Given:Hubble's constant H=70km/s/MpcTo find:Age of universe=??
Q: Which type of star would be the largest? a. M b. O c. B d. K e. A
A:
Q: Given that a pair of stars are found to be orbiting each other with a period of 11.86 [yrs] and a…
A:
Q: Polaris is an F7 star. Which of the following spectral types is slightly cooler than Polaris? A.…
A:
Q: Star clusters are important to our study of stars because a. all stars formed in star clusters.…
A: A star cluster is a group of stars that share a common origin and are gravitationally bound for some…
Q: The resolution of Olbers’s paradox suggests that it gets dark at night because a. the universe is…
A: The resolution of Olbers’s paradox suggests that it gets dark at night because the universe is not…
Q: The density of a ________________ is greater than the density of a _________________. a. white…
A: A white dwarf is a stellar remnant of a star, which is formed after the star depletes the hydrogen…
Q: The place on the H–R diagram where contracting protostars first become visible is a. the…
A: The place on the H–R diagram where contracting protostars first become visible is the birth line.
Q: The first stars to form in our galaxy a. had circular orbits. b. had highly elliptical…
A: Population 1 stars are the newer and younger stars.
Q: How does the age of the universe relate to the Hubble constant? a. The smaller the constant, the…
A: As we know that the inverse of the Hubble constant gives us the age of the universe and which is…
Q: The place on the H–R diagram where stars settle into the longest, most stable portion of their…
A: The place on the H–R diagram where stars settle into the longest, most stable portion of their…
Q: The theory that waves of compression move around the galaxy triggering star formation is called a.…
A: In general, flocculation theory is a process in which the smaller sizes particles gets collided with…
Q: A star’s classification is K5 III. What is the temperature of this star? a. 3000 K b. 8000 K…
A: According to the HR ( Hertzsprung - Russell ) diagram , The star classification according to their…
Q: Assume that when a certain main sequence star becomes a giant gas, its luminosity increases from L…
A:
Q: A group of 10 to 100 stars that formed at the same time but are so widely scattered in space their…
A: Before answering, We will discuss each of the given options. 1) Globular cluster - Globular…
Q: Which of the following statements is wrong? A. A main-sequence star is cooler and brighter than it…
A:
Q: Which stars have the longest period of variability? a. RR Lyrae b. Type I (classical) Cepheids…
A: Variable stars: Variable stars are the stars that change their apparent magnitude. There are two…
Q: The orbit of the binary pulsar PSR 1936+16, studied by Taylor and Hulse, a. is so small that the…
A: Pulsars are a kind of highly magnetized compact neutron rotating very dense stars having a short…
Q: Which of the following is the smallest? b. neutron star c. red giant d. main sequence star e.…
A: Neutron star is the smallest star and formed when a massive star runs out of fuel and collapse to…
Q: A cloud of dust and gas where a star begins to form: A. Stellar nebula B. Planetary nebula C.…
A: To determine a cloud of dust and gas where a star begins to form
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The type of star that does not currently exist because our universe is not old enough is a
a. red dwarf.b. white dwarf.c. brown dwarf.d. black dwarf.
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