Imagine we find a star that has the same radius as the Sun, but its temperature is 9.6 times greater. That star should be _____ times as luminous as the Sun.
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?
We use the equation below to solve for the star’s luminosity, relative to the sun’s, where L = luminosity and T = surface temperature, when the radius is the same. Here, surface temperature equals 9.6 solar
Ans.
So, Luminocity is 8493.46 times!
From Doppler's Mathematical Insight the semi-major axis (a) is equal to
Here, P is time period. 200/365 = 0.5479 times the P of earth. Putting this in above equation we get,
Semi-major axis of this planet is 0.6696 times the earth.
Imagine we find a star that has the same radius as the Sun, but its temperature...
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.97 Earth years in its circular orbit around its sun, which is a star with a measured mass of 3.41 times 10^30 kg. Find the radius of the exoplanet's orbit. _____ m
Problem 1: Imagine a planet whose distance to the sun varies, in the course of its orbital motion, between 1.38 AU and 1.67 AU. What is the semimajor axis of this planet’s orbit? Select One of the Following: (a) 3.05 AU (b) 1.53 AU (c) 1.38 AU (d) 1.67 AU Problem 2: What is the eccentricity of this planet’s orbit? Select One of the Following: (a) 0.065 (b) 0.075 (c) 0.085 (d) 0.095 Problem 3: How long does it take...
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.77 Earth years in its circular orbit around its sun, which is a star with a measured mass of 3.79 x 1030 kg. Find the radius of the exoplanet's orbit. radius:
In Lecture 4, we discussed Kepler’s third law relatingthe orbital period of a planet (p) to the semi-major axis (orbital distance, a) of its orbit(p2= a3). We can apply this law as long the object orbits the Sun or another object of the same mass, and the units of orbital period are in (Earth) years and the orbital distance is in Astronomical Units(AU). [1AU is equal to the distance between the Earth and the Sun]. [Note: Newton extended this law...
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.07 Earth years in its circular orbit around its sun, which is a star with a measured mass of 3.17 X 1030 kg. Find the radius of the exoplanets orbit.
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.17 Earth years in its circular orbit around its sun, which is a star with a measured mass of 3.99 × 1030 kg. Find the radius of the exoplanet\'s orbit.
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.01 Earth years in its circular orbit around its sun, which is a star with a measured mass of 3.11 × 1030 kg. Find the radius of the exoplanet\'s orbit.
Astronomers discover an exoplanet, a planet orbiting a star other than the Sun, that has an orbital period of 4.01 Earth years in a circular orbit around its star, which has a measured mass of 3.97X10^30. Find the radius of the exoplanet's orbit.
Astronomers discover an exoplanet, a planet obriting a star other than the Sun, that has an orbital period of 3.69 Earth years in a circular orbit around its star, which has a measured mass of 3.63 x 1030 kg. Find the radius of the exoplanet's orbit. radius: 2.74 x1011
Astronomers discover an exoplanet, a planet obriting a star other than the Sun, that has an orbital period of 3.31 Earth years in a circular orbit around its star, which has a measured mass of 3.33×1030 kg . Find the radius of the exoplanet's orbit.