<p><strong>Question</strong>: <em>Which is the average or maximum speed of a telematically sent message that a space probe can send</em>? Is as simple as radio waves travel at the speed of light in a vacuum?</p>

<p><strong>Context</strong>: I have been asked to make a first estimation about how much time is needed to send a space probe and then receive the signal. </p>

<p>I am supposing that the space probe is sent at $15 \ km/s$ but I have not idea of the telematic signal speed. </p>

<p>Thank you in advance! </p>

CC BY-SA 3.0
2014-03-15T18:49:59.393Z
This question appears to be better suited for [Space Exploration](http://space.stackexchange.com/).
e-sushi
CC BY-SA 3.0
2014-03-16T00:23:37.127Z
Taking the speed of light will be a good approximation, as long as the signal is sent directly.
Gerald
CC BY-SA 3.0
2014-03-17T15:08:00.603Z
Marc, do you want to know the average or the maximum, or both? This needs to be cleared up.
called2voyage
<exoplanet><space><extra-terrestrial>
Max. speed that a space probe can communite with the Earth?
mcejalvo
# Max. speed that a space probe can communite with the Earth?

(Asked by: username_0 on 2014-03-15)

**Question**: *Which is the average or maximum speed of a telematically sent message that a space probe can send*? Is as simple as radio waves travel at the speed of light in a vacuum?

**Context**: I have been asked to make a first estimation about how much time is needed to send a space probe and then receive the signal.

I am supposing that the space probe is sent at $15 \ km/s$ but I have not idea of the telematic signal speed.

Thank you in advance!

**Tags:** exoplanet, space, extra-terrestrial

> **Comments:**
> **username_1**: This question appears to be better suited for [Space Exploration](http://space.stackexchange.com/).  
> **username_2**: Taking the speed of light will be a good approximation, as long as the signal is sent directly.  
> **username_3**: Marc, do you want to know the average or the maximum, or both? This needs to be cleared up.  

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## 0 answers

