## How do you calculate perihelion distance?

The perihelion distance P=a(1’e) and the aphelion distance A=a(1+e) where e=0.875 is the eccentricity. This gives a perihelion distance of 2.375AU and an aphelion distance of 35.625AU.

### Is Kepler’s third law correct?

Kepler’s third law provides an accurate description of the period and distance for a planet’s orbits about the sun.

**What do Kepler’s Law accurately describe?**

Kepler’s Laws of Planetary Motion They describe how (1) planets move in elliptical orbits with the Sun as a focus, (2) a planet covers the same area of space in the same amount of time no matter where it is in its orbit, and (3) a planet’s orbital period is proportional to the size of its orbit (its semi-major axis).

**What is L in Kepler’s second law?**

Kepler’s second law states that a planet sweeps out equal areas in equal times, that is, the area divided by time, called the areal velocity, is constant. Consider Figure 13.20.

## What is the geometric shape of a satellite or planetary orbit?

Johannes Kepler’s laws of planetary motion are: The major application of Kepler’s first law is to precisely describe the geometric shape of an orbit: an ellipse, unless perturbed by other objects.

### What does area swept out mean?

Equal areas in equal times

**What is a real velocity?**

In classical mechanics, areal velocity (also called sector velocity or sectorial velocity) is the rate at which area is swept out by a particle as it moves along a curve. The areal velocity equals this area divided by the time interval “t in the limit that “t becomes vanishingly small.

**Did Kepler understand gravity?**

Kepler claimed that gravity was caused by two bodies, rather than one, and as such, the moon was the cause of the motion of tides on the Earth. In recognition of his contribution to his our understanding of the motion of the planets, NASA named their planet-finding telescope after the German astronomer.

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