They can go in incubator now. They can be put in incubator 2 days after set or up to 8 days. The duck egg that was layed yesterday can be but wait a day or 2 for the newer ones. I would wait a while until you have a clutch of eggs that are needed, the eggs will be fine up to 8 days.
At last, on January 31, 1958, the United States succeeded in launching its first satellite, the Explorer. The Explorer was still slighter than Sputnik, but its launch sent it deeper into space. The Soviets responded with yet another launch, and the space race continued.
And you might be surprised to learn that while NASA helped build the first satellite telescope, it was the United Kingdom who sent the first telescope into space. In April 1962, the U.K. sent Ariel 1 into orbit. It has the distinction of not just being the first space telescope launched, but also the first international satellite, as it was a collaborative effort between the United States and Britain.