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 ].
An unmanned NASA-contracted rocket exploded in midair early Tuesday evening, producing huge flames and loud booms along the eastern Virginia coast but no injuries or deaths.Orbital Sciences Corp.'s Antares rocket and Cygnus cargo spacecraft had been set to launch at 6:22 p.m.n unmanned NASA-contracted rocket exploded in midair early Tuesday evening, producing huge flames and loud booms along the eastern Virginia coast but no injuries or deaths.