## Do satellites slow down over time?

Artificial satellites slow down all the time, and uniformly, they are no longer able to resist the pull of gravity and fall back to Earth. Satellites carry fuel to help maintain their orbits, but when that fuel runs out… sooner or later they will fall back to the ground.

## What happens to a satellite that is Travelling too slowly?

If the satellite is moving too slowly then the gravitational attraction will be too strong, and the satellite will fall towards the Earth. This occurs at speeds around or below 7600 m/s.

## What affects the speed of a satellite?

As seen in the equation v = SQRT(G * Mcentral / R), the mass of the central body (earth) and the radius of the orbit affect orbital speed. The orbital radius is in turn dependent upon the height of the satellite above the earth.

## How do you increase orbital speed?

If the force that the Sun exerts on the planet increases (as the planet moves closer), then the acceleration of the planet must increase, resulting in a higher orbital speed, and vice versa.

Venus

Mercury

## What is the fastest thing we can build?

Top 10 fastest man made objects ever

• 7 Discovery Space Shuttle, 17400 miles per hour.
• 6 Apollo 10 Capsule, 24791 miles per hour.
• 5 Stardust, 28856 miles per hour.
• 4 New Horizons, 36373 miles per hour.
• 3 Voyager 1, 38610 miles per hour, 38610 miles per hour.
• 2 Helios 1, 142000 miles per hour.
• 1 Helios 2, 157078 miles per hour.

## What is the fastest object made by man?

NASA solar probe becomes fastest object ever built as it ‘touches the sun’

• Fastest human-made object: 244,255 mph (393,044 km/h).
• Closest spacecraft to the sun: 11.6 million miles (18.6 million kilometers).