"This withdrawal is fuelled by an emotional public relations campaign designed by some of the same environmental groups whose long-time mission has been to kill mining and grazing jobs on the Arizona Strip, as well as tourism jobs at the Grand Canyon," McCain told a hearing in Congress last year.
That's a long time coming," Mission Control radioed.
These are mainly psychological effects of human factors which are very important in the case of a long time space mission.
While analytic methods generate data suitable for initial estimates and general assessments on delta-v and transfer time for rather fast trajectories, the selected approach also covers long transfer time missions and allows direct and easy access to other relevant mission parameters.
It will be a long time before the mission field office is run by a Cambodian.
To be clear, if you add up expenditures of any federal program for a long enough period of time, you will reach $1 trillion, but the total of NASA's budget since its founding in 1958 still doesn't add up to anywhere near this amount of money -- even with adjusted dollars -- so it will be a long time before Mars missions would reach $1 trillion.
"The Chinese have dealt with the British for a long time, since Macartney's mission to China in 1793.
And not much has changed since the early days of Mars's exploration: the search for life is still what it is all about.It will be a long time before a manned mission to Mars is possible (see article), but in the meantime NASA has plans to continue its search for Martian life.
The men were to be gone five days, the Sergeant revealed — a fairly long time for a reconnaissance mission — and on hearing this Eriksson experienced a sense of exhilaration, just as he had at the prospect of far shorter patrols in which he had taken part.
Exterior and interior transfers, based on the transit through the regions where the collinear libration points are located, have been studied for a long time and some space missions have already taken advantage of the results of these studies.
With regard to lunar missions, exterior and interior transfers, based on the transit through the regions where the collinear libration points L1 and L2 are located, have been studied for a long time and some space missions have already taken advantage of the results of these studies.
