One of the most important components of space travel is maintaining a stable connection between the Earth and the spacecraft, which flies almost at the speed of light. A recent study shows that this will actually be a big problem for astronauts traveling to other stars due to the vast distances in space.. The results of the study were published on the arXiv preprint server, writes IFLScience.

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In the study, physicists presented two scenarios with a spacecraft flying towards other stars at speeds close to the speed of light.. Although such a vehicle does not exist yet, nothing in physics denies that it can be built. This spaceship is moving with an acceleration of 1g.

In the first scenario, the spacecraft maintains this acceleration as it moves away from Earth. Communications will work fine at first, although there will be some delays, but after a while messages from Earth will no longer be able to reach the spacecraft. As the spacecraft gains more speed and approaches the speed of light, it will always be ahead of messages from Earth. Then the spacecraft will not be able to communicate with our planet at all.

Physicists have also identified another unusual effect, but it concerns astronauts on board the spacecraft. An object that moves close to the speed of light experiences time dilation. Thus, astronauts aboard a spacecraft accelerating at 1 g could reach the center of our Milky Way galaxy, which is 26,000 light years away, within 20 years..

In the second scenario, the spacecraft accelerates at 1g for a while and then decelerates at 1g as it approaches its destination.. Communication with the Earth will also be unstable, as in the first scenario, until, during the deceleration, all messages catch up with the spacecraft. Messages will accumulate as the spacecraft approaches its target.

Physicists have concluded that astronauts on a spacecraft traveling at almost the speed of light will have to give up communication with Earth for the entire mission, except for a short period after launch.

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