Le Trifid Nebula.
Q: Why are metals less abundant in older stars than in younger stars?
A: Answer: The metals which basically are non hydrogen and helium material are produced or created in…
Q: If a prostellar disk is 260 au in radius and the disk plus the forming star together contain 7 solar…
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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: What is the orbital speed at the disk's outer edge in kilometers per second if a protostellar disk…
A:
Q: The dust in a molecular cloud has a temperature of about 34 K. At what wavelength (in nm) does it…
A: temperature = T = 34 K wavelength = λmax=?
Q: The Hydra super cluster is at a distance of about 800 MParsec. What is the recessional velocity?
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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: A molecular cloud is 22 pc in diameter and is located 303 pc from Earth. What is its angular size on…
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Q: What factors resist the contraction of a cloud of interstellar matter?
A: Interstellar matter is defined as the space between the stars' systems in the galaxy. It is made…
Q: Why does the solar nebula theory predict that planetary systems are common?
A: The nebular hypothesis explains the planet's formation and evolution in our Solar System. It was…
Q: How does the extreme temperature sensitivity of the CNO cycle affect the structure of stars?
A: As a result of the extreme temperature dependence of CNO burning, those stars that are dominated by…
Q: Explain what makes the planetary nebula glow and what makes the supernova remnant glow. Which of…
A: Planetary nebulae and supernova remnants are both glowing celestial objects in space, but they are…
Q: . How does the H-R digram of a given star cluster change as the cluster ages?
A: HR Diagram : Note : Blue color indicates the hottest stars and red color represent the…
Q: what is the smallest planet that could be detected around a 0.4 Rsun M dwarf star?
A: transit depth is the ratio of surface area of planet and the star transit depth = πRp2πRs2 where Rp…
Q: Use the illustration to answer the question. Which stages involve the collision and clumping of…
A: The above problem can be solved by using the concept of nebular hypothesis or by understanding solar…
Q: Which of the following spectral classes has stars with the hottest temperature? a. F0 b.…
A: Here given the stars with spectral classes.We have to find the stars which is hottest.
Q: Consider the diagram. What conclusion concerning the amount of diffraction compared to the wavlength…
A: The conclusion concerning the amount of diffraction compared to the wavelength and size of opening…
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: accoeding to the solar nebula thoery, why is earths orbir nearly in the plane of the suns equator.
A: According to solar nebula theory, the Sun and all planets in our solar system had formed from a…
Q: What is hydrostatic equilibrium in stars.
A: The interstellar medium is mostly made of hydrogen. When the mass of the interstellar medium becomes…
Q: 2. The Crab pulsar radiates at a luminosity of $1 \times 10^{31} \mathrm{~W}$ and has a period of…
A: (a) To determine the rate at which the period is increasing and how long it will take to double:Step…
Q: What percentage of the mass of the solar nebula consisted of elements other than hydrogen and…
A:
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- The Solar nebula was "mostly" b. hydrogen compounds: ammonia, methane and water c. heavier elements d. rocks and minerals e. hydrogen and helium elementsWhat is a standard candle in the astronomical sense? How do Cepheid variables fit into this and what are some other examples here?The first stars to form in our galaxy a. had circular orbits. b. had highly elliptical orbits. c. were population I stars. d. all had orbits in the same plane. e. formed the galactic clusters we see today.
- Using a 8-m reflector telescope on Mars, what is the maximum distance we could measure using stellar parallax?G5If a protostellar disk is 240 AU in radius and the disk plus the forming star together contain 9 solar masses, what is the orbital speed at the outer edge of the disk in kilometers per second?
- What does a quarter wavelength look like , like theta/4The Orion Nebula is about 20 light-years (20 × 1018 cm) across, enclosing a roughly spherical area with a volume of 4.19 × 1057 cm3. Calculate the number of 0.1 solar mass stars that might be formed in such a nebula. Assume that the nebula has a density of 1000 atoms/cm3.List the following 5 terms in order through a stars life cycle (starting with the sun), through the remainder of its lifetime: a. Black dwarf b. Planetary nebula c. Red giant d. Star (Sun) e. White dwarf