Question

An astronomer says she has detected a planet with an orbital period of 3 years in...

An astronomer says she has detected a planet with an orbital period of 3 years in orbit around a star that is 3 times the mass of the Sun. What is the orbital radius for this planet (in AU)? (1 mark)

b) Soon after this announcement, another astronomer says he has found a planet in the same system that has a period of 2 years and an orbital radius of 2 AU. Do you believe his figures? (1 mark)

c) Suppose we observe a binary star with components of 2MSun and 3MSun. If the stars are separated by 100 AU what is their orbital period (in years)? (1 mark)

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The planet Mercury has an orbital period of 87.97 days, and its greatest distance (aphelion distance)...
The planet Mercury has an orbital period of 87.97 days, and its greatest distance (aphelion distance) from the Sun is 0.4667 AU {where 1 AU " 1 Astronomical Unit = 1.496x1011 m}. The mass of the planet Mercury is 3.302x1023 kg and the mass of the Sun is 1.988x1030 kg. (a) Calculate the eccentricity of planet Mercury’s orbit around the Sun. ! (b) Calculate the highest speed of planet Mercury as it orbits around the Sun?
Astronomers discover an exoplanet, a planet obriting a star other than the Sun, that has an...
Astronomers discover an exoplanet, a planet obriting a star other than the Sun, that has an orbital period of 3.75 Earth years in a circular orbit around its star, which has a measured mass of 3.21×1030 kg . Find the radius ? of the exoplanet's orbit.
You are embedded in the Kepler program in which planetary systems are being detected around other...
You are embedded in the Kepler program in which planetary systems are being detected around other stars. You detect a possible planet in orbit around a star whose peak wavelength of radiation is 0.38 microns, which is considerably shorter than that of our Sun. Calculate the “goldilocks distance” for this system, the orbital distance from this star at which you would expect a planet to have a surface temperature of 0°C. (Assume the planet has an albedo of 0.3, and...
The planet gamma Cephei Ab has orbital period of 2.38 years and luminosity of gamma Cephei...
The planet gamma Cephei Ab has orbital period of 2.38 years and luminosity of gamma Cephei A is 3.25 luminosity of the sun and gamma Cephei B is 0.04 the luminosity of sun. Do you think the planet gamma Cephei Ab (or a large moon around it, if it has one) could support life? Why or why not? Take into account the characteristics of the orbits and the luminosities of the stars.
Planet Yoyo is discovered to orbit around a star with 5 times the mass of our...
Planet Yoyo is discovered to orbit around a star with 5 times the mass of our Sun. It orbits at a distance of 7 AU in a circular orbit. The orbital period is measured to be 8 years. Find: 1) The mass of the planet. Give the answer in both solar masses and kilograms 2) The mass of the star in kilograms 3) The distance of the planets orbit in meters. 4) The force due to gravity between the planet...
Chiron is a comet in orbit around the Sun. Chiron's orbital period is about 50.4 years...
Chiron is a comet in orbit around the Sun. Chiron's orbital period is about 50.4 years and the orbit has an eccentricity of about 0.38.   1) average distance from the Sun, a = ___________ AU (round to the first decimal place, 3 significant figures) Set the semimajor axis equal to the a you found using Kepler's 3rd Law. 2) P squared = _____________ (round to the nearest hundred) 3) a cubed =________________ (round to the nearest hundred) Click on show...
Suppose we find a planet with an orbital period of 200 days around a star with...
Suppose we find a planet with an orbital period of 200 days around a star with the same mass as the Sun, but only 75 percent as luminous. What is the planet’s semi-major axis, in AU? For the planet in the problem above, how many times more flux does it receive, relative to Earth? (If you find that the flux is less than that of Earth, express your answer as a decimal. For example, if the planet receives half as...
A double-star system with each star having the mass of the Sun has an orbital period...
A double-star system with each star having the mass of the Sun has an orbital period of 1 year. A second double star system, also with each star having the mass of the Sun, has an orbital period of 8 years. If the separation of the stars in the first system is d and the orbits in both cases are circular, what is the separation of the stars in the second system? 8d 0.5d 4d 2d
Two identical stars with mass M orbit around their center of mass. Each orbit is circular...
Two identical stars with mass M orbit around their center of mass. Each orbit is circular and has radius R, so that the two stars are always on opposite sides of the circle. A) Find the orbital speed of each star and the period of the orbit. B) Suppose each identical mass for the binary stars is halved, then the orbital period would change by: a. Remain the same b. Change by a factor of 1/?2 c. Change by a...
Satellite X, a small moon of Planet X, has an orbital period of 1.77 days and...
Satellite X, a small moon of Planet X, has an orbital period of 1.77 days and an orbital radius of 4.22 x 10^5 km. a) What is the mass of Planet X? b) Assume that Satellite X moves in a circular orbit. What is its orbital speed? c) A small mass of m = 2.5 kg is dropped from rest from the moon. What is its speed when it reaches the surface of Planet X, whose radius is 71,492 km?...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT