Skip to comments.Probe spies moon's volcanic plume (Jupiter's moon, Io).
Posted on 03/01/2007 1:49:02 AM PST by Jedi Master Pikachu
The plume is seen as an umbrella-shaped feature in the long exposure image to the right
Nasa's New Horizons spacecraft has sent back images of a huge volcanic eruption on Jupiter's moon Io.
A massive dust plume, estimated to be 150m (490ft) high, can be seen erupting from the Tvashtar volcano on Io.
On Wednesday, the US probe flew by Jupiter, using the planet's gravity to boost its speed, reducing the travel time to its ultimate target of Pluto.
New Horizons also took photos of the icy moons Europa and Ganymede in the run-up to its encounter with Jupiter.
Turning its cameras to the giant planet itself, the spacecraft captured an image of Jupiter's little red spot, a nascent storm south of the famous great red spot.
New Horizons made its closest approach to Jupiter at 0543 GMT (1243 EST) on Wednesday, passing within 2.3 million km (1.4 million miles) of the planet.
The gravity "kick" will accelerate the probe's speed by 14,000kmph (9,000mph).
The probe will carry out more than 700 observations of the Jupiter system by June, in a dry run for its planned rendezvous with Pluto and its moons in 2015.
The pictures of Io provide the best glimpse yet of Tvashtar, one of the most active volcanoes on Io. The volcano can be seen in the "11 o'clock" position in the images. It is surrounded by a dark patch the size of Texas consisting of the fallout from the eruption.
The probe's observations of icy moons like Europa and Ganymede will allow scientists to map their surface features and composition.
Europa is an attractive target; planetary scientists consider it one of the best places in the Solar System to find extraterrestrial life forms.
Beneath its outer shell of ice, the moon is thought to host an ocean of water warmed by heat from the interior.
The little red spot, or Red Jr, is a swirling storm that formed from three smaller features between 1998 and 2000.
Its larger counterpart, the great red spot, is Jupiter's most famous feature. It has been in existence for at least 130 years.
After an eight year cruise across, New Horizons will conduct a five-month study of Pluto and its three moons in 2015, characterising their geology, structure and composition.
Aren't we supposed to leave Io alone???
New Horizons is at Jupiter already!!!! Man, that craft is booking!
Amazing stuff out there....
Jupiter's Little Red Spot Growing Stronger
ScienceDaily | Saturday, October 14, 2006 | NASA/Goddard Space Flight Center
Posted on 10/14/2006 8:05:01 PM EDT by SunkenCiv
"ALL THESE WORLDS ARE YOURS EXCEPT EUROPA. ATTEMPT NO LANDINGS THERE."
All these worlds are yours except Europa. Attempt no landings there.
I think they meant km. 150 meters is no big deal.
A massive dust plume, estimated to be 150 miles (240km) high, can be seen erupting from Io's Tvashtar volcano.
Io,Io, so off to work I go....
Europa, of course, I'd forgotten.
Ouch. You're right, of course. It's been several years since I've read them, or any Arthur C. Clarke for that matter.
It's supposed to be the fastest human creature made spacecraft ever.
Appreciated. (For the links in this and the preceding post).
Is that from the 2001 Rubrick(?) guy in one of the sequel stories?
Yep. The article has been changed to 150 miles, or 240 kilometers (kilometres since they're British).
RA, thanks for the ping! I'm a bit busy right now (on our next projects, not New Horizons), so I'm still catching up on threads.
As for the speed, yes, the launch speed of New Horizons was faster than any other spacecraft. The wet mass (including fuel) was under 500 kg. However, the Voyager spacecraft have a faster final velocity due to multiple gravity assists. New Horizons is now going faster than it ever will, and is gradually slowing over time.
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