Saturday, October 31, 2015

Enceladus Flyby -- Follow Up

NASA’s Cassini spacecraft has begun transmitting its latest images of Saturn’s icy, geologically active moon Enceladus, acquired during the dramatic October 28 flyby in which the probe passed about 30 miles (49 kilometers) above the moon’s south polar region. The spacecraft will continue transmitting its data from the encounter for the next several days.

“Cassini’s stunning images are providing us a quick look at Enceladus from this ultra-close flyby, but some of the most exciting science is yet to come,” said Linda Spilker from NASA’s Jet Propulsion Laboratory in Pasadena, California.

Researchers will soon begin studying data from Cassini’s gas analyzer and dust detector instruments, which directly sampled the moon’s plume of gas and dust-sized icy particles during the flyby. Those analyses are likely to take several weeks, but they should provide important insights about the composition of the global ocean beneath Enceladus’ surface and any hydrothermal activity occurring on the ocean floor. The potential for such activity in this small ocean world has made Enceladus a prime target for future exploration in search of habitable environments in the solar system beyond Earth.

Cassini’s next and final close Enceladus flyby will take place on December 19 when the spacecraft will measure the amount of heat coming from the moon’s interior. The flyby will be at an altitude of 3,106 miles (5,000km).

--Astronomy Magazine--

Tuesday, October 27, 2015

Enceladus Flyby

FYI: Tomorrow, October 28, 2015, the Cassini spacecraft will do a close flyby of Saturn's moon Enceladus. At closest approach Cassini will be just 30 miles above the surface and fly through the icy plume spraying from the region of the south pole which is thought to come from a vast global ocean underneath the surface ice.

The spray is speculated to be the result of hydrothermal activity and Cassini will sample the chemistry measuring for molecular hydrogen among other things.

After this, there will be one final Enceladus flyby in December.

Here's a NASA animation of tomorrow's flyby: