What evidence is there that star formation has occurred recently?
Q: All stars start their lives with the same basic composition. What determines their differences? O…
A: Mass they formed with
Q: Which type of fusion reaction supports stars for the longest time? Group of answer choices hydrogen…
A: The hydrogen to helium fusion reaction supports stars for the longest time. Because, the force of…
Q: What is an emission nebula?
A: The space between stars and galaxies is filled with clouds of gas and dust. These clouds of gas and…
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: A star's Zero Age Main Sequence (ZAMS) radius R, luminosity L, and effective temperature Teff depend…
A: Given: Zero Age Main Sequence is beginning point of the main sequence of the star. The radius at…
Q: The water molecules now in your body were once part of a molecular cloud. Only about onemillionth of…
A:
Q: How do the temperature and size of a Sun-sized star fluctuate over the course of its life?…
A: Immediate Assistance : You cannot wait for help if you require quick aid. Because it also implies…
Q: What are the approximate spectral type, temperature, absolute magnitude number, and luminosity of…
A: Required : Spectral type, absolute magnitude, temperature and luminosity of star E.
Q: For each type of stellar explosion, identify its progenitor star
A:
Q: Calculate the mass of a star having a diameter of 6E5 km and an average density of 1.5 g/cm3.…
A: We have : Density = masscolumeVolume of star = 43x π x r3Diameter of star = 6 x 105kmRadius of star…
Q: We observe a star that is dstar away. How much extinction would there need to be (i.e., what must…
A:
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: Why are the classification systems changing every now and then?
A: In universe all creatures are found, identified. Again, till now many spices are discovering around…
Q: Why massive stars are short lived?
A: A massive star has a shorter life spanthan an average star because of fasterhydrogen fuel…
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: What causes a star to move off the main sequence?
A:
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: We observe a star that is dstar away. How much extinction would there need to be (i.e., what must 7…
A: A star is observed that is at a distance away.We need to find the value of the extinction required…
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: 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 our Sun were surrounded by a cloud of gas, would this cloud be an emission nebula? Why or why…
A: Emission nebulae are formed in regions surrounding young stars. When a star is formed in the…
Q: tain
A: Given:- (a) For given TLC: The solvent front is 5.5 cm.
Q: suppose a planetary nebula is 2.8 pc in diameter, and doppler shifts in its spectrum show that the…
A: Given information: The diameter of the nebula (D) = 2.8 pc = 2.8 (3.1×1013 km) = 8.68 ×1013 km The…
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: 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: A planetary nebula expands at 32 km/s. How far will it expand (in km) in 0.6 million years?
A: Expansion rate of the Nebula: It can be defined as the distance up to which the nebula expands in a…
Q: Based on what you know about main-sequence stars, select all of the correct statements from the…
A: Required : Correct statements .
Q: How massive have to be a main-sequence star in order to survive for at least 15 billion years?
A: The objective of this question is to determine the mass of a main-sequence star that would allow it…
Q: Why does a star's life expectancy depend on its mass?
A: Stars are formed due to the gravitational collapse of interstellar gas. This collapse is…
Q: In which component of the interstellar medium do new stars form? O molecular clouds O HII Intercloud…
A: Interstellar medium is the medium between matter and radiation. The matter are gases (gas cloud),…
Q: What is fusion? How does it happen inside a star?
A: Nuclear fusion is the process by which two light atomic nuclei combine to form a single heavier one…
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: What determines the mass distribution of forming stars, the initial mass function (IMF
A: Stars are formed when gas, giant clouds, dust etc. present abundantly in space come together due to…
Q: Calculate the mass of a star having a diameter of 6E5 km and an average density of 1.1 g/cm3
A: It is given that,
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- We observe a star that is dstar away. How much extinction would there need to be (i.e., what must tau(τ) be) if we had ignored intervening dust, and concluded that it was actually 2*dstar away? Value: dstar = 850 pcOrder the following statements so that they make sense according to star birth stages 1.At this stage, energy moves to the surface primarily through convection. At the end of this stage, the photosphere's temperature can reach 3,000K 2.In this stage, nuclear fusion starts and the energy transport mechanism switches from convection to radiative diffusion 3.In this stage, nuclear fusion rate is high enough to balance out the rate of radiative energy escape the surface 4.During this stage, gravitational contraction causes its luminosity to decrease because the protostar gets smaller while its surface temperature stays the sameThe initial stage of star formation is a free-fall collapse. This switches over to a more gradual collapse when: nuclear fusion begins in the core of the cloud. hydrogen in the cloud is completely ionized. convection sets in below the surface of the young star. the cloud becomes opaque to its own radiation.
- Consider three main sequence stars: Star A is 14,500 K, Star B is 2,900 K, and Star C is 5,500 K. What are the colors of each of these stars?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 dwarfThe microlensing technique for detecting extrasolar planets involves obtaining OBSERVING brightness measurements of a star and identifying brief, periodic dips in its brightness infrared images of a planet with the light from its host star blocked out a spectrum of a star and identifying periodic wavelength shifts in its features brightness measurements of a star and identifying a brief magnification in its brightness a spectrum of an extrasolar planet and identifying elements and compounds present in its atmosphere
- 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 causes an aging giant star to produce a planetary nebula?