You measure a star to have a parallax angle of 0.12 arc-seconds What is the distance to this star in parsecs? 8.33 Hint: d = 1/p What is the parallax angle of a different star that is twice as far away as the star from th

Q: Hertzsprung-Russell Diagram Blue or blue white White Yellow Red orange Red Superglants beleignne…

A: In this problem, it is asking about the brightest star.

Q: On Earth, the parallax angle measured for the star Procyon is 0.29 arcseconds. If you were to…

A: Write the relation in distance and parallax angle. d=1p

Q: Hertzsprung-Russell Diagram Bhe or bhue white White Vellow Red orange Red ORigel Superglants…

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: If a star has a parallax of 0.025 arc second and an apparent magnitude of 5.0, how far away is it,…

A:

Q: 1141|1 Section Three - Understanding Main Ideas Low Mass Star Dust C. --0- 1. Red giant 2. Protostar…

A:

Q: The energy in Joules per second (J/sec) falling on one square meter is defined as   a. absolute…

A: The apparent brightness of an object that appears to the human eye is known as Luminance. What we…

Q: If the two stars orbit in a such a way that the big star is 4 AU from the center of the mass and the…

A: Given:distance of larger star from COM, ra = 4 AUdistance of smaller star from COM, rb = 12 AUtotal…

Q: Considering absolute magnitude M, apparent magnitude m, and distance d. Compute the unknown for each…

A: Given: Considering absolute magnitude M, apparent magnitude m, and distance d To determine: a.M if…

Q: The apparent visual magnitude of star (Rigel) is 0.12.  Use the method of spectroscopic parallax to…

A: The distance to the star is given by, d=10m-M+55 Here, d is the distance in parsecs, m is the…

Q: The apparent magnitude of a star is (4.3) and the parallax angle is (0.161) arcseconds. The absolute…

A: The absolute magnitude of a star is given by the formula, M=m-5 log10D10 where D is distance of the…

Q: Two stars have the exact same luminosity, but star Y is four times dimmer looking that star X. This…

A: Basic Details Two stars star X and star Y have same luminosity. The brightness of the star is…

Q: A Cepheid variable has a period of 17 days and an average apparent magnitude of 23. Find its…

A: Given, Period = 17 days Apparent magnitude = 23 Absolute magnitude = 4.83 By the distance modulus…

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

A:

Q: Two stars in a binary system orbit around their center of mass. The centers of the two stars are…

A: Given: The mass of the larger star is 3.56×1030 kg. The distance between center's of both the mass…

Q: A star spans a parallax angle θ = 2 arcsecond when seen on Earth (6 months spans 2θ).  Its distance…

A: The astronomers use the unit Parsec, for measuring the distance. 1 parsec is the distance to a star…

Q: What is the dependence of the intensities of stars on parallax? Hint: consider the inverse-square…

A:

Q: is

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

Q: In the Sub giant phase which of the following is true? O The star is burning He in the core O The…

A: Given : In the Sub giant phase  The star is burning He in the core The star is burning He in a shell…

Q: Which star is brighter as seen from the Earth? (you only have one try for this problem) A) A star…

A: Answer :- The dog star or sirius A  is the brightest star in Earth's night sky.  (A) The magnitude…

Q: Which type of star would be the largest? a. M b. O c. B d. K e. A

A:

Q: In a certain binary-star system, each star has the same mass which is 8.5 times of that of the Sun,…

A: GIVEN :                Mass of star = M = 8.5 x mass of sun                distance between stars =…

Q: The apparent magnitude of a star is (4.3) and the parallax angle is (0.161) arcseconds. The absolute…

A:

Q: From its spectral type, the surface temperature of a main sequence star is measured to be about…

A: Using the 1r2 rule method, we can find out the star's distance by measuring the intrinsic brightness…

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

A: Consider the brightness of the stars A and B be FA and FB, respectively, these luminosities be LA…

Q: A certain star has a parallax of 0.647 arcseconds.  How far away is it (in metres)?  [Type in the…

A: Given : Parallax = 0.647 arcseconds

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

A: The parallax is given by

Q: Plaskett's binary system consists of two stars that revolve In a circular orbit about a center of…

A: Given : |v| = 240 km/s = 240 × 103 m/s T = 12.5 days = 1.08 × 106 seconds Msun = 1.99 × 1030 kg

Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm. If the line…

A: Given data:  Rest Wavelength (λ0) = 486.1 nm In star's spectrum wavelength λ = 486.7 nm Required:…

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 less massive star will usually live longer than a more massive star O True O False

A: In star hydrogen is the fuel

Q: A star has a period of P = 37 days. It has a radius of 5.7 times the radius of the sun. Calculate…

A: The period of the star: P = 37 days (37 x 24 x 60 x 60 seconds = 3.2 x 106 seconds); The radius of…

Q: Give ALL correct answers referring to the properties of known stars, i.e., B, AC, BCD...…

A: Required : Correct answers:

Q: Suppose a star has a luminosity of 7.0x1026 watts and an apparent brightness of 4.0x10-12 watt/m?.…

A: Given: The luminosity is 7x1026 W. The apparent brightness is 4x10-12 W/m2.

Q: nitude m = 3.6.  What is the apparen

A: Given: To find the magnitude of the dimmer star is calculated shown as: m2 =3.6,b1b2  =12.4

Q: The star Sirius has an apparent magnitude of -1.46 and appears 95-times brighter compared to the…

A: The apparent magnitude is the magnitude of a star as observed on Earth and depends on the distance…

Q: Which of the following is the smallest? b. neutron star c. red giant d. main sequence star e.…

A: Neutron star is the smallest star and formed when a massive star runs out of fuel and collapse to…

Q: Size, surface temperature, and distance from the Earth are three things that determine the of the…

A:

Q: What is the distance to a star with a parallax angle of 0.5 arcseconds? A. 5 parsecs B. 15 parsecs O…

A: parallax method   It is one of the best method to find the distance of the nearby object by using a…

Q: The luminosity of a star is 6.6 x 1031 W and the peak wavelength in its spectrum is 4.6 x 10-7 m.…

A: Given  L = 6.6*10^(31) W  Wavelength = lambda = 4.6*10^(-7) m  Area = πR² = A  Temperature = T

Q: For stars C and D, what is the main difference between them? O Their brightness, C is brighter than…

A: Required : Difference between stars C and D.

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.