f a star’s lifespan is 1.1 × 10 7 years, what is its mass and spectral type?

Q: Two stars are in a binary system. One is known to have a mass of 0.700 solar masses. If the system…

A:

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: If a star is located at 62.5 pc and has an apparent magnitude of 6 what is it absolute magnitude?

A: The brightness of a star is determined by its composition and distance from the Earth. There are two…

Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…

A:

Q: A star has a parallax of 0.8 seconds of arc. What is the distance of the star?

A: Parallax can be defined as the change in the position of an object due to a change in the observer's…

Q: How far away would the Sun need to be to be just visible to the naked eye (apparent magnitude =…

A: Solution: Given that apparent magnitude, m = 5.90 the absolute magnitude of the Sun, M = 4.83

Q: What is the temperature of a star emitting light with a peak wavelength of  7,080 angstroms?  T=…

A: Given : λmax = 7080 angstroms = 7080*10-10 m. From Wien's law the temperature of star is  T =…

Q: Favorite Star Polaris is 132 pc from Earth and has an apparent magnitude of 2.5. What is its…

A: When the brightness of a star is measured there are two ways, Apparent and absolute magnitudes.…

Q: What star has the largest stellar parallax as measured from opposite ends of the Earth's orbit about…

A: Parallax is the apparent displacement of an object because of a change in the observer's opinion.…

Q: If a star has a parallax of 0.016 arc second how far is it?

A: Parallax is the shift in the apparent position of stars when observed from different positions. This…

Q: Why does the luminosity of a star depend on both its radius and its temperature?

A: Luminosity is the radiant power emitted by star. The luminosity is measured in Watt or Joules per…

Q: According

A: There is a simple relationship between a star's distance and its parallax angle: d = 1/p The…

Q: If a star's absolute magnitude value is significantly larger than its apparent magnitude value…

A: Absolute magnitude Mv: The magnitude that a star is expected to have if it were at a distance of 10…

Q: A star has an apparent magnitude of 10.0 and an absolute magnitude of 2.5. How far away is it?

A:

Q: is

A: The relationship between apparent visual magnitude(m), Absolute visual magnitude(Mv) and distance(d)…

Q: A certain star is 13.7 times dimmer than a star with apparent magnitude m = 3.9.  What is the…

A: We are given the ratio of brightness of stars. We are given the apparent magnitude of the brighter…

Q: What is the luminosity of a star having three times the radius of the Sun and a surface temperature…

A: The luminosity of a star is a measure of the total amount of energy that is radiated by a star per…

Q: Star A has an apparent magnitude of –1.5 and is 12.6 light-years from Earth. Star B has an apparent…

A: Given: dA=12.6ly=3.863parsec, dB=15.6ly=4.783parsec, mvA=-1.5, mvB=0.4 The apparent magnitude of a…

Q: What measurements would you make (assuming you have the money, time, & equipment) to determine a…

A: In this question we have to answer what measurements we will make to determine the surface…

Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…

A:

Q: .

A:

Q: You observe a star with an apparent magnitude mv=12 at a distance of 1 kiloparsec.  What is this…

A: The relation between apparent magnitude, absolute magnitude, and distance of star in parsec is given…

Q: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…

A:

Q: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…

A: Required : Approximate ratio of the flux.

Q: You measure a star to have a parallax angle of 0.04 arc-seconds. What fraction of a degree is this?

A: Given 0.04 arc second=....°

Q: Calculate the absolute magnitude of a star at a distance of 6 pc with an apparent magnitude of 3.

A: The apparent magnitude and absolute magnitude are two terms used to define the brightness of a star.…

Q: A star is observed to have a parallax of 0.0015".  What is the distance to the star in  units of AU?

A: The distance to the star can be calculated using the formula: distance (in parsecs) = 1 / parallax…

Q: How far away is the star Spica, whose parallax is 0.0130?

A: When an observer's point of view changes the displacement observed for an object is called as…

Q: What is the parallax of a star that is 150 pc from Earth?

A: The parallax is given by

Q: How do you calculate the mass of a star?

A: To calculate mass of a single star is a difficult process however to calculate the mass of binary…

Q: A star has an apparent magnitude of 6 and an absolute magnitude of 3. How far is the star from…

A: The distance of a star can be measured from its absolute and apparent magnitude.    The apparent…

Q: A star has a distance of 40 pc. What is the parallax of the star?

A: The distance of a star and its parallax are related as,   d=1/p, where, d= distance in parsecs, and…

Q: The main-sequence age of a star of 1M⊙ is about 1010 years. What is the main-sequence age of a star…

A: Answer the following question is

Q: Compute the distance to the following stars using the luminosity-distan relationship: m-M=5 log (d)…

A: Apparant Magnitude (m) = 9.95Absolute Magnitude (M) = 0.75

Q: A star has an apparent magnitude of 10 and an absolute magnitude of 2.5. How far is it?

A:

Q: Calculate the luminosity of the star with an apparent magnitude of 2. Given the Sun has an apparent…

A: The luminosity of a star is defined as the amount of energy that is radiated from the surface of a…