A star is observed to have a parallax of 0.05". If we were to send a radio signal towards this star how much time would it take for the signal to reach the star?

Q: Why would it be easier to take parallax measurements if we were on a planet farther from the sun…

A: Parallax is the apparent shift in the position of a star when viewed from two…

Q: We can use the parallax equation to determine the distances (in pc) to the stars. 1 dA da dB dB = =…

A: From the given related question,we have,mv = 14Parallax of star A = 0.060 arc secondsParallax of…

Q: Earth is about 150 million kilometers from the Sun, and the apparent brightness of the Sun in our…

A: Distance of earth from sun, dE = 150 x106 km Apparent brightness of sun at earth distance is BE =…

Q: If a star has a parallax angle of 0.768" and the width of your pinky is about 1 degree, what…

A: Parallax method is used to find the distances of distant objects. Parallax can be understood with…

Q: Determine the mean molecular mass of a star for both the scenario of being completely neutral and…

A:

Q: The H-alpha line from a star is observed to be 725 nm. Estimate its redshift.

A: As per De Broglie's hypothesis light can behave both as a wave and particle. Thus light waves can…

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

A: It is given that,

Q: A Spinning Star has a period of rotation of T. Over a period of a million years, its radius…

A: Write the expression for the initial period of the given star, and solve for its initial angular…

Q: A star is observed at a distance of 90 pc. What will be its parallax angle?

A: Parallax is defined as the change in the apparent position of an object due to a change in the…

Q: What is the maximum luminosity for star of 5.76×1010 Msun.

A: In hydrostatic equilibrium, the radiation pressure and gravitational force will balance each other.…

Q: Find the speed for a star in which this line appears at wavelength 122.5 nmnm.

A: Given wavelength = 122.5 nm Hydrogen transition wavelength = 121.6 nm Speed of light is c = 3×108…

Q: Two cars of masses mį and m2 collide at an intersection. Before the collision, car 1 was traveling…

A: Apply momentum conservation in x-direction. m1v1=m1+m2vcosθvcosθ=m1v1m1+m2      ...... (1)

Q: The star Spica is observed to have a parallax of 0.012000. How far away is it in parsecs answers to…

A: Parallax is the change in the apparent position of the object that results from a change in…

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: 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: According

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

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

A: The parallax angle of a star is observed to be θ=0.05''=0.05 arcseconds. Let the distance to the…

Q: If a star is 30 parsecs away what is it's observed parallax shift ?

A: Given thatThe distance to the star (d)=30 parsecsParallax Formulad=1pp=the parallax angle of the…

Q: What is the escape velocity (in km/s) from the surface of a 1.6 M, neutron star? From a 3.0 Mo…

A: The mass of the Sun, M⊙=1.99×1030 kg   The radius of the neutron star, r=11 km

Q: A star has a radius of 2.6 R⊙, and a temperature of 9,758 K. What is the luminosity of this star…

A: Given: The radius of the star is 2.6Ro. The temperature is 9758 K. The temperature of the Sun is…

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: 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…

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.