Which of the following can explain how we can calculate distances to stars despite being able to travel to them? a. Examining stellar spectra b. Period-Luminosity Relations c. Interstellar probes d. Radar e. Triangulation (aka parallax)

Q: Q15. The space observatory Gaia was launched in 2013 as the successor to Hipparcos and is returning…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: Why don’t all supernova remnants contain pulsars?   a. All supernova remnants do contain pulsars.…

A: As we know that pulsar are fast spinning neutron stars. When there is a explosion in a star at the…

Q: How many times brighter or fainter would a star appear if it were moved to: a. twice its present…

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Q: Absolute visual magnitude is   a. the apparent magnitude of a star observed from Earth.   b. the…

A:

Q: 1.)How long do you have to wait for a star to undergo its maximum parallactic displacement? 2.) How…

A: 1. A star to undergo its maximum parallactic displacement is about 326 light years that is equal to…

Q: 1. The stellar parameter that best determines a star's location on the main sequence is: Select one:…

A: 1. The stellar parameter that best determines a star's location on the main sequence is: c. mass…

Q: Which of the following is FALSE (NOT TRUE)? A) The Doppler effect can be used to measure the radial…

A: False statement  (B) we can measure the distance to galaxies using parallax.

Q: 1. Using the observed (apparent magnitude) light curve for a Cepheid variable shown below, estimate…

A: Given is a plot between the apparent magnitude mV and the period in days plot  So first from the…

Q: Two stars are in a closely orbiting binary system. The smaller star (a K-type main sequence star)…

A: The correct option. Following the mass transfer, which of the following is now true of the main…

Q: What is the distance in light years from Earth to a star that makes a parallax angle of 2.0 arc…

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Q: require(s) that a young hot star (T ≥ 25,000 K) be relatively nearby.

A: Correct answer is Emission nebula

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 star is observed to have a parallax of 0.05". If we were to send a radio signal towards this star…

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Q: Q8. Measured the parallax angle of the Sirius Yanmaniya star, see Figure, and found 0.377 arcsec.…

A: Given :  Parallax angle of Sirius Yamaniya star, p* =0.377 arcsec

Q: What is the distance in light years from Earth to a star that makes a parallax angle of 2.0 arc…

A: Given  parallex(p)=2 arc second

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: If you place your index just in front of you and try to look at it with you right eye open and your…

A: Cosmic distance ladder-Used for measuring distances to celestial objects.  Luminosity-Intensity…

Q: In the parallax method of determining stellar distances, the angle to a star is measured while che…

A: Let's assume b=1AU And distance between sun and alpha centaurie is d. θ=2.1x10-4…

Q: The Messier Catalog is a. a listing of all the stars within the Local Bubble b. a list of all the…

A: The Messier catalog is a list of 110 commonly found objects in the night sky that can be easily…

Q: What is the next stag cycle? - Supernova - Neutron Star

A: The sun is the source of heat and light and the midpoint and for the solar system. It is made up of…

Q: Which of the following is least reasonable regarding a star's position on the HR diagram? Group of…

A: "White dwarfs are small and cool and are located in the lower left part of the HR diagram."This…

Q: Which star in the table below has the greatest diameter?     Star Name d (parsecs) Parallax…

A: d. 58 Ori

Q: s rotational period?

A:

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 of the following nuclear fuels does a one-solar-mass star use over the course of its entire…

A: Required : Elements formed in 1 solar mass star.

Q: ow is Doppler shift used in detecting extra solar planets? * A. Scientists observe those stars…

A: In our solar system, all bodies orbit a common center of mass, including the Sun, but the Sun is so…

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: Sirius, the brightest star in the sky has a parallax of 0.379 arcsec What is its distance in…

A:

Q: A helium flash occurs a. because helium is very explosive and cannot be controlled when the…

A: Required : Why does the helium flash occur.

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: a) (Palen, et. al., 2nd, Problem 45) Rigel has a Hipparcos parallax of 0.00412 arcsec. Given Rigel…

A: Rigel and Betelgeuse are located in the constellation of Orion, which are about 864.3 and 642.5…

Q: 3. The spacetime diagram shows four supernovae events at A, B, C, and D. These supernovae arc…

A: (a) Introduction: A light cone is a path that a flash of light, emanating from a single event…

Q: The hook shown in the figure is only capable of resisting 500N vertical net force. Determine the…

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Q: Suppose a spectral line from an object in space was shifted from 5007.0 to 5100.0 Angstroms. What…

A: Given that: A spectral line from an object in space was shifted from 5007.0 to 5100.0 Angstroms.…

Q: The peculiar system SS 433   I. is emitting beams of energy and matter.   II. is producing a…

A: We know that, The peculiar system SS 433 is emitting beams of energy and matter & producing a…

Q: 4. What is the upper limit of a brown dwarf’s size? a. no upper limit b. 0.50 solar masses c. 0.10…

A: What is the upper limit of a brown dwarf’s size.

Q: Black holes are formed by A. collapsed dark nebulae. B. supernovae from binary stars. C. a lack of…

A: ASTRO PHYSICS

Q: Stars A and B both have the same spectral class. Star A is 7 times farther away than star B. The…

A:

Q: The figure below represents the black body curves for two different stars, C and E. Which one would…

A: Answer is as follows

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: 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…