Scientists say the data download has started from the international Cassini spacecraft as it moves through geyser plumes from one of Saturn’s moons.

Todd Barber, NASA’s lead propulsion engineer on the project, says the transmission signal from the unmanned probe was received at 10:01 p.m. EDT Wednesday and “everything looks great.”

The probe was expected to be at a height of nearly 120 miles above the surface of the moon Enceladus (en-SELL’-uh-duhs) as it sweeps through the edge of the geysers and measures their chemical makeup.

In 2005, Cassini surprised scientists when it snapped images of geyser-like eruptions of ice particles and water vapor spewing from that moon’s south pole. That put Enceladus on the short list of places within the solar system is most likely to have conditions suitable for extraterrestrial life.