# Jupiter's Gravity: How Many Ships in the Queue?

• proteo
In summary: Overall, it can be concluded that there would be numerous ships using Jupiter's gravity at the same time in this scenario.
proteo
Imagine you are in the universe of the Expanse book. First of all, you want to speed up your spaceship to reach the alien gate. And you will use Jupiter's gravity. But there is a queue of spaceship wanting to go to the gate, and they all use Jupiter's gravity to accelerate. Suddenly Jupiter comes out of orbit and travels alone in space. How many ships are there using Jupiter's gravity at the same time?

Jupiter's orbital velocity is ~13 km/s. For it to "leave orbit", it would need to gain an additional 5.4 km/sec.
But in an gravity assist maneuver where you are trying to boost the speed of your ship, you are borrowing orbital energy from Jupiter and lowering its orbital speed, not adding to it.
As a rough estimate, a 1 ton spaceship would cause Jupiter to lose 5e-25 km/sec for every km/sec gained by the craft.

Putting that aside, if we use a velocity boost of 4 km/sec (The amount gained by the Horizons probe) as a baseline, then is would take a spacecraft roughly 10 times the mass of the Earth to change Jupiter's orbital velocity by 1 km/sec

It is impossible to determine the exact number of ships using Jupiter's gravity at the same time without more information. However, it is likely that there would be a significant number of ships, as the alien gate is a highly sought-after destination and Jupiter's gravity is a valuable tool for accelerating towards it. The exact number would depend on factors such as the size and capabilities of the ships, the level of competition for the gate, and the current state of the gate's usage.

## 1. How does Jupiter's gravity affect the number of ships in the queue?

Jupiter's massive size and strong gravitational pull can affect the trajectory and speed of ships passing by, potentially causing delays and increasing the number of ships in the queue.

## 2. Is the number of ships in the queue consistent or does it vary?

The number of ships in the queue can vary depending on various factors such as the position of Jupiter in its orbit, the number of ships passing by, and the strength of Jupiter's gravity at that particular time.

## 3. Can Jupiter's gravity cause collisions between ships in the queue?

While Jupiter's gravity can affect the trajectory of ships, it is unlikely to cause collisions between ships in the queue. The ships are usually spaced out and have advanced navigation systems to avoid collisions.

## 4. How does the number of ships in the queue impact space travel to and from Jupiter?

The number of ships in the queue can impact space travel to and from Jupiter by potentially causing delays and increasing travel time. This is why it is important for ships to carefully plan their routes and consider the effects of Jupiter's gravity.

## 5. Are there any safety measures in place to prevent ships from getting stuck in the queue due to Jupiter's gravity?

Yes, ships are equipped with advanced navigation systems and communication devices to ensure their safe passage through the queue. Additionally, space agencies and organizations closely monitor the queue and provide guidance to ships to prevent any potential issues.

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