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# Interplanetary Internet
Interplanetary Internet is at this time still hypothetical extension of the [Internet](internet.md) to multiple planets. As mankind is getting closer to start living on other planets and bodies such as [Mars](mars.md) and [Moon](moon.md), we have to start thinking about the challenges of creating a communication network between all of them. The greatest challenge is posed by the vast distances that increase the communication delay (which arises due to the limited [speed of light](speed_of_light.md)) and make errors such as [packet loss](packet_loss.md) much more painful. Two-way communication (i.e. request-response) to Moon and Mars can take even 2 seconds and 40 minutes respectively. Also things like planet motions, eclipses etc. pose problems to solve.
Interplanetary Internet is at this time still hypothetical extension of the [Internet](internet.md) to multiple planets. As mankind is getting closer to starting living on other planets and bodies such as [Mars](mars.md) and [Moon](moon.md), we have to start thinking about the challenges of creating a communication network between all of them. The greatest challenge is posed by the vast distances that increase the communication delay (which arises due to the limited [speed of light](speed_of_light.md)) and make errors such as [packet loss](packet_loss.md) much more painful. Two-way communication (i.e. request-response) to Moon and Mars can take even 2 seconds and 40 minutes respectively. Also things like planet motions, eclipses etc. pose problems to solve.
We can see that e.g. [real time](real_time.md) [Earth](earth.md)-Mars communication (e.g. [chat](chat.md) or videocalls) are physically impossible, so not only do we have to create new [network](network.md) [protocols](protocol.md) that minimize the there-and-back communication (things such as [handshakes](handshakes.md) are out of question) and implement great [redundancy](redundancy.md) for reliable recovery from loss of data traveling through space, we also need to design **new [user interfaces](ui.md)** and communication paradigms, i.e. we probably need to create a new messaging software for "interplanetary chat" that will for example show the earliest time at which the sender can expect an answer etc. [Interesting](interesting.md) shit to think about.