The probe was due early on Wednesday to make the first of 22 dives in between Saturn's cloudtops and the inner edge of its spectacular rings.
The daredevil flights are designed to gather pictures and other science data of unprecedented resolution.
But Cassini was out of radio contact for the duration of the plunge and is not scheduled to re-establish communications for another day.
Because the probe was moving so fast - at over 110,000km/h (70,000mph) - there was some risk attached to flying through the ring plane.
An impact with even a tiny ice or rock particle at that velocity could do a lot of damage, and so the decision was made to point Cassini's big antenna in the direction of travel, to act as a shield.
But, of course, that meant it could not also then talk to Earth at the same time.
Assuming all goes well, 21 similar dives will be made over the course of the next five months before the probe dumps itself in the atmosphere of Saturn. With so little fuel left in its tanks, Cassini cannot continue its mission for much longer.
Source: BBC
So NSG, what's your opinion on this daredevil Jovian Planet Diver? I personally think that this is a huge achievement. Think of all the amazing pictures of Saturn we could get from this! Another achievement of Cassini is that it's provided more evidence to the possibility of life on one of Saturn's moons. Said moon being Enceladus.
