The red supergiant star in Orion is called Betelgeuse, and its distance is 130 pc. What is the parallax of this star?

Q: Suppose the Sun was part of a binary star system with a period of 15 years and an average separation…

A: Given data Time period ,T=15 years=15×3.154×107 sec Radius, r=10 AU=1.496×1012 m

Q: A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. What is the…

A: a. A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. What is the…

Q: Which star is the faintest: alpha gemini, beta perseus, gamma perseus, beta gemini

A: The star cluster, that is, a tiny glob of stars on the outskirts of the Milky Way that are…

Q: What would be the approximately luminosity of a main sequence star with a temperature of 9,000°C ?…

A: Temperature = 9000° C=9273.15 K Luminosity will be given by following formula:L=σT4 L is the…

Q: A star with a radius twice that of the Sun and a surface temperature twice that of the Sun, will…

A: Luminosity of a star of radius R and surface temperature T is given by L=4πσR2T4 where is the…

Q: How far away is the star Spica, whose parallax is 0.013"?

A: Given Data: The parallax of the star Spica is, p=0.013’’   The expression for the distance in terms…

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

A:

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

A:

Q: Find the distance in parsecs to Vega, which has an annual parallax of 0.129 arcsec. pc

A: It is given that,

Q: Find the distance in parsecs to van maanen's star, a nearby white dwarf, which has an annual…

A: given ,       parallax (p) = 0.232 arcsec

Q: A white dwarf star has a visual luminosity of 0.046LSun. If you were 1 AU from the white dwarf, what…

A: Ldwarf = 0.046Lsun Distance d = 1 AU = 1.496×1011 m Lsun = 3.827×1026 W

Q: If a star has an apparent magnitude of 3.5 and an absolute magnitude of 5, how far away is it?

A:

Q: sequence

A: Hertzsprung-Russell's diagram clearly shows that the star spends most of its life as a main-sequence…

Q: the parallax angle of a star to be 0.002 arc-seconds.  what would the  distance be to this star?

A: Given, Parallax angle, p=0.002 arc-seconds

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: Pls help ASAP. Pls show all work.

A: Your answer is option (b).

Q: Explain the characteristics of Luminosity and the wavelength spectrum of the stars in the following…

A: Stars still more luminous than giants are referred to as supergiant and hyper giants. A hot,…

Q: is

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

Q: Which of the following stars are bright and very cool

A: The Supergiants are cool stars, which are very large and really bright. they're located towards the…

Q: Polaris is an F7 star. Which of the following spectral types is slightly cooler than Polaris?   A.…

A:

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

A:

Q: The star Firefly is located 3.0 pc away. If it had an absolute magnitude of 13.0, which value below…

A: Write the given data. d=3AbsM=13

Q: The life-cycle path followed by a star is determined by the star’s initial  A. mass and size B.…

A: Star's mass is inversely proportional to its life cycle.

Q: The Sun is a G2 star. Which of the following spectral types is slightly hotter than the Sun? O A. 03…

A: Spectral types Temperature (K) O3 >55,000 K0 5240 A1 9330 F2 7050 M9 <2700

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: A newly discovered star, G78392B is 2.33x1015 km away from earth. How many light years away is star…

A:

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: If a star has a radial velocity of 25 km/sec and a transverse velocity of 60 km/sec what is the…

A:

Q: You measure a star to have a parallax angle of 0.12 arc-seconds What is the distance to this star in…

A: Write the given values of the problem- Parallax angle=0.12 arc-second

Q: Over the course of 6 months, a star's parallax angle is measured to be 0.083 arcseconds. What is the…

A: Given that, Parallax angle = 0.083 arcseconds

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: 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,

Q: The lowest mass for a true star is 1/12 the mass of the sun. What is the luminosity of this star (in…

A: Mass of the star, M star=1/12 times the mass of sun We are restricted to take the exponent of 4 for…

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: What is the parallax angle of a star that is 50 pc away? enter your answer in arc seconds

A: Given, distance, d = 50 pc We know that p = 1/d , where p is parralax angle in arc seconds and d is…

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 Balmer lines are strongest in which class of star?   a. O   b. B   c. A   d. K   e. M

A: Balmer lines- it is one of a set of six named series describing the spectral line emissions of…

Q: Consider two stars on the main sequence, A and B. Star A has a mass of 4 M⊙. Star B has a mass of…

A: mass of star A = 4 M⊙mass of star B = 0.8 M ⊙

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

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.