Neptune has an orbital speed around the Sun of about 5.43 km/s (19,548 km/h or 12,146 mph)
the god of the sea
The radius of an orbit is directly related to the average speed of the orbiting body. As the radius of the orbit increases, the average speed of the orbiting body decreases. This is because at a larger distance from the center of mass, the gravitational force decreases, requiring a lower speed to maintain the orbit.
Mercury
165 years (60,190 days)
29.58 km/s or 107,200 km/h
70 miles per hour
-- "Acceleraion" means a change in speed or direction of motion. -- The path of an orbiting body is curved at every point, so its direction is constantly changing. -- So an orbiting body is being constantly accelerated, even if its speed isn't changing.
An orbiting vehicle has sufficient speed to remain in orbit. If an apple is put outside the vehicle, it will continue in orbit with that vehicle. It will just float there. The apple and everything in the space vehicle will be moving at the same speed, and, because the vehicle is in orbit, everything will have sufficient speed to remain in orbit.
As an object gets closer to the object it's orbiting, the gravitational pull between the two objects increases. This causes the object in orbit to accelerate, increasing its speed to balance the gravitational force and maintain its orbit.
The speed of a satellite orbiting Earth primarily depends on its altitude and the gravitational pull of the Earth. According to Kepler's laws of planetary motion, a satellite in a lower orbit must travel faster to counteract the stronger gravitational force compared to one in a higher orbit. The relationship can be expressed using the formula for orbital speed, which shows that speed decreases as altitude increases. Additionally, the mass of the Earth affects this gravitational force, but it remains constant for all satellites orbiting the planet.
Electrons are negatively charged particles of atoms. They are found orbiting the nucleaus at a high speed.
Scientists must carefully set the right orbital speed for a satellite that will be orbiting Earth, so that it will orbit correctly. The wrong speed will have the satellite move too fast, or too slow, skewing information and possibly causing the satellite to fall out of orbit and back to the planet's surface.