ar formation, themselves f
Q: Life on Earth wouldn't be possible without supernovae. Why?
A:
Q: Suppose a planetary nebula is 4.6 pc in diameter, and Doppler shifts in its spectrum show that the…
A: The diameter of planetary nebula is given as, D=4.6 pc. Then, the radius of planetary nebula is…
Q: What would most bright nebulae look like if there were no interstellar dust?
A: A nebula is defined as a large region of interstellar clouds made of dust, hydrogen, helium, and…
Q: In the direction of a particular star cluster, interstellar extinction allows only 12% of a stars…
A: Given In the direction of a particular star cluster, interstellar extinction allows only 12% of a…
Q: If a contracting protostar is seven times the radius of the Sun and has a temperature of only 2030…
A: The luminosity (L) of the contracting protostar relative to the sun be defined as, LL⊙=RR⊙2TT⊙4…
Q: If you assume that a globular cluster 2 arc minutes in diameter is actually 27 pc in diameter, how…
A: The expression for the distance from small angle formula, Angular diameter206265=linear…
Q: All of the single red-dwarf stars that ever formed are still on the main sequence today. (T/F)
A: Main sequence stars are those which are fusing hydrogen to helium in their cores. Almost 90% of the…
Q: How does a contracting protostar convert gravitational energy into thermal energy?
A: Stars are formed from clouds of gas present in the interstellar medium. Since the temperature is low…
Q: If a giant molecular cloud is 73 pc in diameter and a shock wave can sweep through it at 9 million…
A: Given: The diameter of the giant cloud is d = 73 Pc. The time taken by the shock wave to pass…
Q: A giant molecular cloud is 30 pc in diameter and has a density of 339 hydrogen molecules/cm^3. What…
A: Concept used: Mass is found by multiplying by density and volume of sphere.
Q: If a giant molecular floyd is 73 pc in diameter and a shock wave can sweep through it in 9 million…
A:
Q: A red giant loses a solar mass in 150,000 years via a superwind. After 0.9 million years, it has a…
A: Dear student, as per the Qn-+A guidelines I will answer the first question only. Please, ask the…
Q: A typical dense core of an interstellar gas cloud has a diameter of 0.2 pc and a mass of 2 solar…
A: The diameter of the gas cloud is defined as 0.2 pc. Therefore, the radius of the gas cloud will be…
Q: If a giant molecular cloud is 60 pc in diameter and a shock wave can sweep through it in 3 million…
A: Given the diameter of a giant molecular cloud is d = 60 pc (Parsec) time taken to sweep the cloud is…
Q: How does the presence of degenerate matter in a star trigger the helium flash?
A: As per the Pauli Exclusion Principle not more than two electrons inside an atom can have the same…
Q: What critical event must occur in order for a protostar to become a star?
A: A very young star that is yet gathering mass from the parent molecular cloud is called a protostar.…
Q: If you assume that a globular cluster 6 arc minutes in diameter is actually 18 pc In diameter, how…
A:
Q: If a contracting protostar is three times the radius of the Sun and has a temperature of only 3000 K…
A:
Q: At the average density of a star-forming molecular cloud, about 900 atoms per cm3, determine how…
A: Given:- M=2 times 1030 kg density=900 atoms/cm3= 1.51 times 10-18 kg/m3 Find radius of the sphere…
Q: If interstellar dust makes an RR Lyrae variable star look 5 magnitude fainter than the star should,…
A: Given the magnitude get fainter by 5. Therefore,
Q: How is the turnoff point on the H-R diagram of a cluster related to the cluster’s age?
A: Given:- The turnoff point on the H-R diagram of a cluster related to the cluster’s age Explain:- How…
Q: Why massive stars are short lived?
A: A massive star has a shorter life spanthan an average star because of fasterhydrogen fuel…
Q: High-mass stars start off with much more fuel than low-mass stars. Why don't high-mass stars live…
A: Required : Why don't high mass stars live longer.
Q: If a globular cluster contains 2 million stars and is 28 pc in diameter, what is the average…
A: This problem can be solved by first calculating the average volume reserved for one star and then…
Q: Consider two different clusters with approximately the same turnoff luminosity. Cluster A has a main…
A: Given two clusters A and B on the H-R diagram (which is a plot between the luminosity and…
Q: If you assume that a globular cluster 2 arc minutes in diameter is actually 19 pc in diameter, how…
A: Given, a globular disc cluster is 2 arc minutes in diameter. The actual diameter is d = 19 pc let D…
Q: When two stars are in the same star system, they can affect each other’s evolution. Two stars in the…
A: Two stars in the same system might evolve at a different pace, depending on their distances in the…
Q: If a contracting protostar is eight times the radius of the Sun and has a temperature of only 2190…
A: The relation between the radius and luminosity of two stars is as follows: LLSun=RRSun2TTSun4…
Q: If the hottest star in the Carina Nebula has a surface temperature of 51,000 K, at what wavelength…
A: Concept: "The Wien's displacement law states that the wavelength carrying maximum energy is…
Q: Observations show that the gas ejected from SN 1987A is moving at about 10,000 km/s. How long will…
A:
Q: Gas clouds that form stars are pulled together by which of the following?
A: The correct option is A : Gravitational Fields
Q: If an open cluster contains 450 stars and is 21 pc in diameter, what is the average distance between…
A: Given Number of stars in an open cluster (n) = 450 Diameter of the cluster Dclu = 21 pc…
Q: If a contracting protostar is 0.5 times as luminous as the Sun and has a temperature of only 1,500…
A:
Q: At the average density of of a star-forming molecular cloud, about 1180 atoms per cm3, determine how…
A:
Q: If a giant molecular cloud has a mass of 6.7 ✕ 1035 kg, and it converts 9 percent of its mass into…
A: Given data- Mass of giant molecular cloud m=6.7×1035 kg It converts 9% of its mass into stars…
Q: A giant molecular cloud is 27 pc in diameter and has a density of 380 hydrogen molecules/cm3. What…
A: Given the diameter of the giant molecular cloud is d = 27 pc (parsec) Density of the cloud is 380…
Q: you assume that a globular cluster 4 arc minutes in diameter is actually 27 pc in diameter, how far…
A:
Q: What critical event must occur in order for a protostar to be- come a star?
A: Stars are formed from interstellar clouds. When the mass becomes high enough the molecular cloud…
Q: a)What type of supernova is most luminous in light? (b) What kind of star results in such an…
A: a) Supernova is an astronomical event take place when a white dwarf star exploded. When the white…
Q: Based on what you know about the interactions between stars and other interstellar media, select all…
A: Interstellar space and formation of stars Interstellar space is the space between stars. This space…
Q: The initial stage of star formation is a free-fall collapse. This switches over to a more gradual…
A: Stars get their energy by fusing hydrogen in their core. This process is called fusion. The energy…
Q: The RR Lyrae stars in a globular cluster have apparent magnitudes of 14. Assuming an absolute visual…
A: Given that the apparent magnitude mv=14 and the absolute visual magnitude Mv=0.5, substituting…
Q: 1) a) Calculate the Jeans length for the dense core of a giant molecular cloud with T=10 K, n =…
A: To answer: a) Calculate the Jeans length for the dense core of a giant molecular cloud with T=10 K,…
Q: A main sequence star of mass 25 M⊙has a luminosity of approximately 80,000 L⊙. a. At what rate DOES…
A: Given information: The mass of the star (m) = 25M⊙ The luminosity of the star (L) = 80000L⊙ part a):…
How are giant molecular clouds (GMCs), the loci of most star formation, themselves formed out of diffuse interstellar gas?
Step by step
Solved in 2 steps
- If you assume that a globular cluster 6 arc minutes in diameter is actually 27 pc in diameter, how far away is it? (Hint: Use the small-angle formula.)If an open cluster contains 650 stars and is 27 pc in diameter, what is the average distance between the stars? (Hint: On average, what share of the volume of the cluster surrounds each star?)If an open cluster contains 350 stars and is 48 pc in diameter, what is the average distance between the stars? On average what, share of the volume of the cluster surrounds each star?
- If a giant molecular cloud is 38 pc in diameter and a shock wave can sweep through it in 6 million years, how fast is the shock wave going in kilometers per second? (Notes: 1 pc = 3.1 1013 km; 1 yr = 3.2 107 s.) answer in km/sA supernova’s energy is often compared to the total energy output of the Sun over its lifetime. Using the Sun’s current luminosity, calculate the total solar energy output, assuming a 1010 year main-sequence lifetime. Using Einstein’s formula E=mc2 calculate the equivalent amount of mass, expressed in Earth masses. [Hint: The total energy output of the Sun over its lifetime is given by its current luminosity times the number of seconds in a year times its ten billion-year lifetime; ; mass of earth = 6×1024kg; c = 3×108m/s. Your answer should be 200-300 Earth masses.]If interstellar dust makes an RR Lyrae variable star look 7 magnitudes fainter than the star should, by how much will you over- or underestimate its distance? (Hint: Use the magnitude-distance formula d = 10 mv - Mv + 5)/5.) destimate dactual = Is your calculated value an over- or underestimate? O overestimate O underestimate
- Match each statement with the appropriate item (if the first corresponds to B and the next 4 to C, enter BCCCC) 1) group of stars that was formed all at the same time, with the same composition 2) the top of the main sequence of a cluster; more massive stars in the cluster have already evolved 3) globular clusters stars that are burning helium in their core 4) young, spread out star cluster 5) old, dense star cluster A. main sequence turnoff B. open cluster C. star cluster D. horizontal branch stars E. globular clusterHow many years? Thank you!What are the main products of the fusion reactions that take place in low mass main sequence stars?
- What causes an aging giant star to produce a planetary nebula?If a giant molecular cloud has a diameter of 56 pc and drifts relative to nearby objects at 19 km/s, how long (in yr) does it take to travel a distance equal to its own diameter?If a contracting protostar is five times the radius of the sun and has a temperature of only 2000 K, how luminous will it be?