The Voyager 1 spacecraft, launched on the 5th of September in 1977, is the farthest-traveling Earth-made object. On the 25th of August in 2012, it crossed the heliopause, which can be considered the boundary of the solar system. According to the JPL Voyager website, Voyager 1 is currently (6th of August 2021) approximately 22,982,855,000 kilometers from the Sun, traveling away from the Sun at approximately 16.9995 km/second. JPL lists the current round-trip time for radio communication as 40 hours and 27 minutes (145620 seconds). Radio waves travel at the speed of light, which is approximately 299,792,458 meters/second.

Write a function that calculates the round-trip communication time at a future date. Your function should take one argument, which is a number of days after today, and return the round-trip time in seconds. (You don't need to adjust for the additional distance traveled during the time that the radio transmission is in flight.)

For reference, the equations are:
\[ \text{distance} = \text{distance at start} + \text{velocity} \times \text{time since start} \]
\[ \text{round-trip communication time} = 2 \times \frac{\text{distance}}{\text{speed of light}} \]

Use your function to estimate the round-trip communication time 1, 3, 10, 100, or 300 years from now. Your calculated time will probably differ from that given by JPL because they are calculating the round-trip communication time between Voyager 1 and the Earth. The Earth's average distance from the Sun is 149.598 million km (which is also known as one Astronomical Unit, or AU), so the distance between Voyager 1 and the Earth may differ from that between Voyager 1 and the Sun by plus or minus 1 AU.

To check that your answers are reasonable, work out how big a difference this can make to the round-trip radio communication time, and check if the difference you get is less.

(Note: There is a similar exercise in Punch & Enbody's book, programming problem 1 on page 79; however, the values they give for Voyager 1's distance and speed do not agree with JPL's.)

The required output is:
True
True
True

Start with:
```python
def communication_time(days):
```

And to get the True, True, True, the following print statements need to be included:
```python
print(abs(communication_time(0) - 153325.1) < 10)
print(abs(communication_time(55) - 153864.1) < 10)
print(abs(communication_time(365.25*6) - 174798.5) < 10)
```