Do. 1  Do spend some time understanding the point of what you are about to write. 2  Do make lists. 3  Do use an appropriate tone. 4  Do write several drafts of each paragraph. 5  Do compare your first draft copy with other material from previous issues of the journal or website.
Mars is so far away in fact that it takes radio signals quite a long time to get from the spacecraft back to Earth. During Curiosity EDL, this delay will be 13 minutes, 48 seconds, about mid-way between the minimum delay of around 4 minutes and the maximum of around 24 minutes.
All light (or electromagnetic radiation, which includes radio signals) travels up to this speed, and radio waves from Earth to Mars Express and back are no exception.. The time from Earth to Mars varies between 4 and 24 minutes because earth (and mars) are both orbiting the sun, not each other.