With the information brought back by the Observer, the Academy postulated the time remaining for humanity to stay at the new planet: a year and a half.
Even though it would take a year and a half for the neutron star fragment to make contact with the sun, one year from now, the fragment will enter the solar system. Its gravitational pull by then will be strong enough to disturb the celestial activities. To prevent accidents, mankind will only remain for another year at the new planet, just to be safe.
In other words, the next warp would happen in the middle of Human Calendar Year 10. This last year was absolutely precious to humanity.
The Hope’s new three extra levels, construction of Defense-Grade Spaceships One and Two, mining and smelting of mineral ores, all these took time.