At a 3 percent growth rate, its doubling time â or the number of years to double in size â is 23 years. (The doubling time for a population can be roughly determined by dividing the current growth rate into the number 69.. Therefore, 69/3=23 years.
But the attempt was scrubbed about an hour before launch due to the helium leak. Todays launch has been scrubbed due to a helium leak on Falcon 9's first stage, SpaceX officials announced in an update today. A fix will be implemented by the next launch opportunity on Friday April 18, though weather on that date isn't ideal. [ See photos of SpaceX's 3rd Dragon mission to the space station ].
Sputnik satellites were a series of space vehicles sent up into space by the Soviets. Sputnik 1 was the first artificial satellite, sent up in October 1957, really just to test the feasibility of a man made satellite. Sputnik 1 stayed in low orbit around the earth for 3 months before re-entering and burning up through the earths atmosphere. Further Sputnik vehicles took animals and men into space, or took probes to Venus and Mars. .