What is the radius of the solar system?
Looking at the aphelion(according to NASA figures) of the orbit of the farthest acknowledged planet, Neptune, the Solar System would have a radius of 4.545 billion km and a 9.09 billion km diameter.
How is a solar system determined?
By studying several things, mostly meteorites, and using radioactive dating techniques, specifically looking at daughter isotopes, scientists have determined that the Solar System is 4.6 billion years old. Some elements decay within nanoseconds while others have projected half-lives of over 100 billion years.
How is the radius of the sun measured?
The Mt Wilson (USA) system (by spectrography) measures the Sun’s apparent radius in the neutral iron spectral line at 525 nm (Ulrich & Bertello, 1995). The radius measured by the authors is derived from the drop-off of brightness of the solar disk at its edge and is a function of the temperature and density profile.
How do you find the radius of a planet?
To determine the planet radius, the brightness drop of the parent star that occurs during a planetary transit is measured. This brightness drop is directly related to the ratio of the planet radius to the radius of its parent star, as shown in the image below.
What is a solar diameter?
865,370 mi
Sun/Diameter
How many light years is the radius of the solar system?
Astronomers suggest that the solar system is about 0.5 light year long or possibly even a full light year.
How is Age of Sun determined?
The age of the Sun can be estimated from the ages obtained from radioactive dating of the oldest meteorites. Therefore the age of the Sun should be close to the age of the meteorites, which can be found using the method of radioactive dating.
What is the solar radius of the sun?
432,690 mi
Sun/Radius
How do you find the radius of a planet’s gravity?
Assume that that mass is at the centre of the earth. Then use the formula for the force (acceleration) on a mass at the radius which would be the surface of the Earth using F = M1 M2/r^2 and equate that to 9.8 Ms^(-2) and you will be able to solve for r^2, take the square root and you will have the radius.