What factors resist the contraction of a cloud of interstellar matter?
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: 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: 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: A molecular cloud is 22 pc in diameter and is located 303 pc from Earth. What is its angular size on…
A:
Q: You observe a spectral line from an emission nebula at a wavelength of 723 x 10-9 m. If you are…
A:
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 protostellar disk is 210 AU in radius and the disk plus the forming star together contain 4…
A: the orbital speed is, v=GMr one solar mass is 1.989×1030 kg and 1 AU is 1.496×1011 m. thus,…
Q: Now, rank the same objects by increasing temperature. For spherical objects, use the surface…
A: Intercloud gas: The gases other than intersteller gases present in space are known as intercloud…
Q: If the RR Lyrae stars in a globular cluster have average apparent magnitudes of +19, how far away…
A: From the figure, absolute magnitude of RR Lyrae star is 0.75. Using the Magnitude-Distance formula,…
Q: Let’s say you’re looking for extrasolar planets. You observe a star that has a spectral shift in the…
A: Write down the values using suitable variables. Here, c signifies the speed of light in a vacuum.
Q: The very first "image" of a black hole, at the centre of galaxy M87, was recently taken by the Event…
A: Given: The wavelength of the hydrogen line is λ = 21 cm The diameter of the earth is D = 12742 km…
Q: Why massive stars are short lived?
A: A massive star has a shorter life spanthan an average star because of fasterhydrogen fuel…
Q: Globular clusters contain no stars more massive than the Sun. Which of the following seems like the…
A: First, we are aware that no stars more massive than the Sun can be found in globular clusters. Any…
Q: A giant molecular cloud is 30 pc in diameter and has a density of 330 hydrogen molecules/cm^3. What…
A:
Q: 8. If a galaxy has an apparent radial velocity of 2000 km/s and the Hubble constant is 72 km/s/Mpc,…
A: Using Hubble's law we can solve this
Q: A) A typical dust grain has a radius of about 0.1 micrometers and a mass of 10-14 grams. Roughly…
A:
Q: Soft iron is a material, in which the process of O a. magnetization and demagnetization is difficult…
A: Here, we have to discuss the property of Soft iron.
Q: you assume that a globular cluster 4 arc minutes in diameter is actually 27 pc in diameter, how far…
A:
Q: planetary nebula expands at 38 km/s. How far will it expand (in km) in 3 million years?
A: Here given nebula is expanding with given speed. As in 1 sec nebula expands 38 Km, In 3 million…
Q: Hotter, more massive stars are virtually absent from globular clusters. What does this tell us?…
A: Globular clusters are clusters of stars, that are nearly symmetrical and round shaped clusters.…
Q: QUESTION 16 Use the figure shown below to complete the following statement: A low-mass protostar…
A: During the formation of a low-mass protostar, a protostar accumulates mass by accreting material…
Q: Why are interstellar lines so narrow?
A: Spectral lines are formed due to electrons making transitions between the energy levels inside the…
Q: Why does a solar nebula flatten into a disk instead of a sphere, even though the gravity of a nebula…
A:
Q: Given a low density cloud of Hydrogen atoms, what happens when the temperature of the cloud is…
A:
Q: Why do old stars have less metal compared to new ones?
A: As per the Big Bang theory, the universe expanded from an initial high-density state. In the…
Q: Arrange these statements in order according to the Nebular theory 1. X Heating interstellar cloud…
A: Answer is 1.Nearby cataclysmic explosion of supernova occurred 2. Interstellar cloud…
Q: What temperature would interstellar dust have to have to radiate most strongly at 100 micro meter?
A: When stars die they will slowly send out their outer layers. This forms large clouds of dust and is…
Q: Which of the following statements is/are true regarding a nebula? Which of the following statements…
A: According to the latest research, The solar system came into existence from a single nebula (known…
Q: ction of the available gas? How is the rate at which stars form determined by the properties of the…
A: As per rule, allowed to answer one question at a time and post the remaining in the next submission.
Q: Astronomers are studying the supermassive black hole (SMBH) of an AGN with a mass of 108 Mo. The…
A: Given : Red shift of SMBH = 0.05 Velocity of dispersion = 300 km/s…
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) Rank the following components of the interstellar medium in order of the wavelengths at which…
A: (a). Components of the interstellar medium are detected due to the interaction between photons of…
Q: How do the spectra of H II regions differ from the spectra of reflection nebulae? Why?
A:
Q: An interstellar cloud is observed at a wavelength of 2.898 µm. Estimate the temperature of the…
A: The energy released by the core of a star is absorbed by its outer layers which then remits them.…
Q: How is the blue color of a reflection nebula related to the blue color of the daytime sky?
A: Nebula is a giant cloud of dust and gas. Some are formed after the explosion of a star when it's…
Step by step
Solved in 2 steps
