These are the problems... 1. At 1G of acceleration, how long does it take to reach the speed of light (299 792 458 m / s) relative to the object accelerating? Obviously it never reaches the speed of light relative to the earth but I'm also curious what this speed is relative to us. 2. This is a little more difficult. How long does it take at this rate of acceleration does for the object to... Hmm, okay, let's say a star is 5 light years away, and at the rate of 1G of acceleration, it takes 5 years relative to the the object to get there relative to the object. I'm looking for this number. Does this make sense? I should be able to do this but, apparently I'm a little retarded. I'm done with school so this isn't homework or anything but I would appreciate it you can show your work. Very curious, thank you for your time. How this whole discussion started Basically, using 8 probes travelling 30K km/s, each with 8 sub probes, it would take 10Billion years to explore 4% of the milkyway. Basically, ET's haven't had enough time to find us according to the article. Article has many flaws but great for discussion about interstellar life. Anyway, can you shed some light?