## What does the line of apsides mean?

The line of apsides, connecting the two points, is the major axis of the orbit. The point nearest the focus is the pericentre, or periapsis, and that farthest from it is the apocentre, or apoapsis.

## What do you called the line joining the perihelion and aphelion?

*The line of apsides is the line connecting positions 1 and 2. The Earth’s two apsides are the farthest point, aphelion, and the nearest point, perihelion, of its orbit around the host Sun.

**What is apsides in astronomy?**

Apse, also spelled apsis, plural apsides, in astronomy, either of the two points on an elliptical orbit that are nearest to, and farthest from, the focus, or centre of attraction. The line of apsides, connecting the two points, is the major axis of the orbit.

**What is the name of the line which joins the Sun and the Earth while the Earth is revolving around the Sun?**

The equator is an imaginary line drawn right around Earth’s middle, like a belt. It divides Earth into the Northern Hemisphere and the Southern Hemisphere. Another imaginary line drawn straight through Earth connecting the North Pole to the South Pole is Earth’s axis of rotation.

### What is the perihelion position of the earth?

Perihelion is the point of the Earth’s orbit that is nearest to the Sun.

### What is the point called that is the closest to the Sun in an elliptical orbit?

Perihelion

The Earth comes closest to the Sun at a specific point due to an elliptical orbit. This moment in time is called the Perihelion.

**What is the farthest point in an orbit called?**

The closest point a satellite comes to Earth is called its perigee. The farthest point is the apogee. For planets, the point in their orbit closest to the sun is perihelion. The farthest point is called aphelion.

**What is the highest point in an orbit called?**

The mountain represents the highest point in the orbit. That’s called the apoapsis.

## What are the four important position of the Earth?

1 ans)A year is mainly divided into four seasons – winter, spring, summer and autumn. These seasons are experienced due to change in the position of Earth around the sun. Positions of the Earth change around sun because of its revolutions and tilts.

## What is the revolutionary period of the Earth?

365.26

Earth: Planet Profile

Mass (kg) | 5.98 x 1024 |
---|---|

Rotation period (length of day in Earth days) | 1 (23.93 hours) |

Revolution period (length of year in Earth days) | 365.26 |

Obliquity (tilt of axis degrees) | 23.4 |

Orbit inclination (degrees) | 0 |

**What does rotational inertia tell us about an object?**

Rotational inertia is a property of any object which can rotate along some axis. It is a scalar value and it tells us how difficult it is to change the rotational velocity of the object around some given rotational axis. Rotational inertia plays a similar role in rotational mechanics as the mass in linear mechanics.

**Can you find tables of equations for rotational inertia?**

For more complicated shapes, it is generally necessary to use calculus to find the rotational inertia. However, for many common geometric shapes it is possible to find tables of equations for the rotational inertia in textbooks or other sources.

### How to determine the moment of inertia of a circle?

Change the circle’s moment of inertia and then try rotating the circle by using different amounts of blue putty. Repeat this process several times. Examine the situation to determine that torque and mass are involved in the rotation. Draw a careful sketch of the situation. Determine the system of interest. Draw a free body diagram.

### Where is the line of apsides in an ellipse?

The line of apsides of an ellipse connects point 1 and 2 (major axis). An apse line, or line of apsides, is an imaginary line defined by an orbit ‘s eccentricity vector. It is strictly defined for elliptic, parabolic, and hyperbolic orbits. For such orbits the apse line is found: