Can a satellite change its orbit after being launched?

In one line

The rule

Satellites can change their orbits by firing onboard thrusters (small engines) or by using gravity from other bodies.

There is no single formula, but the basic idea is: Change in orbit = Force from thrusters or gravity assist

Let's understand it simply

Imagine you are riding a cycle on a round path. If you want to go faster or take a wider circle, you pedal harder or steer differently. In space, a satellite moves in a fixed path (orbit) around the Earth. If it wants to shift to a higher or lower path, it needs a push. This push comes from small engines called thrusters. By firing these thrusters in the right direction, the satellite can move to a new orbit, just like you can change your path on a cycle by pedaling or steering.

How it works

1. The satellite is launched into its first orbit by the rocket.
2. To change orbit, it fires its thrusters (small engines) at the right time.
3. The thrusters push the satellite, changing its speed and direction.
4. This new speed or direction puts the satellite into a new orbit (higher, lower, or even a different shape).
5. Sometimes, satellites use gravity from the Moon or other planets to help change their path (called gravity assist).

The story behind it

The idea of changing orbits came as scientists wanted satellites to do more than just circle the Earth. Early satellites stayed in one path, but soon, we needed them to move to different heights for jobs like weather watching, TV signals, or spying. Engineers added thrusters to satellites, allowing them to change orbits as needed. India's own satellites, like those in the INSAT series, use this technology.

Where you see it in real life

• TV satellites: Move to the right spot above India to give good signal.
• Weather satellites: Change height to get a wider or closer view of clouds and storms.
• Navigation satellites: Adjust their paths to cover the whole country for GPS.
• Space missions: India's Mangalyaan (Mars Orbiter) changed orbits several times to escape Earth's gravity and reach Mars.
• Repair missions: Some satellites move closer to others for repairs or to avoid space junk.

Why it matters

• Allows satellites to do many jobs with one launch.
• Helps avoid collisions with space debris.
• Saves money by making satellites last longer.
• Needed for deep space missions (like going from Earth to Mars).

Common mistakes

• Thinking satellites are stuck in one orbit forever — they can move if they have thrusters and fuel.
• Believing all satellites can change orbits — some small or old ones cannot.
• Forgetting that changing orbit uses up fuel, so it cannot be done unlimited times.

Remember it

A satellite can change its path in space if it has engines (thrusters) and enough fuel.