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According to LA Times, Jupiter's moon Ganymede has a salty, underground ocean.
Here is some parts of the article:
What you think guys? This moon is too far away from our world. And also, Ganymede's average orbital speed is very slow than our world;
World's average orbital speed 29.78 km/s (107200 km/h)
Genymede's average orbital speed 10.880 km/s
Is Ganymede our second direction for settle?
Here is some parts of the article:
Using the Hubble Telescope, a team of researchers has detected slight fluctuations in two bands of glowing aurorae in Ganymede's atmosphere that they say could occur only if the moon contained a salty body of water.
"The solar system is now looking like a pretty soggy place," said Jim Green, director of planetary science at NASA. "The more we look at individual moons, the more we see that water is really in enormous abundance."
Ganymede is the only moon in the solar system that has its own magnetic field. However, it is also affected by the magnetic field of Jupiter - the giant planet next door.
"It's like a lighthouse," said Joachim Saur of the University of Cologne in Germany, who led the research.
The reason for the difference is that a saltwater ocean is electrically conductive and creates a secondary magnetic field that would suppress the effects of Jupiter's magnetic field.
The new technique of looking to aurorae for signs of a liquid ocean could lead to discoveries of water on bodies far beyond our solar system, researchers say.
"Imagine a magnetically active star with a planet close by," said Heidi Hammel, executive vice president of Assn. of Universities for Research in Astronomy. "By monitoring the auroral activity on that exoplanet we can infer the presence of water."
A telescope larger than Hubble may be required to observe distant aurorae, but "now we have a tool that we didn't have before," she said.
"The solar system is now looking like a pretty soggy place," said Jim Green, director of planetary science at NASA. "The more we look at individual moons, the more we see that water is really in enormous abundance."
Ganymede is the only moon in the solar system that has its own magnetic field. However, it is also affected by the magnetic field of Jupiter - the giant planet next door.
"It's like a lighthouse," said Joachim Saur of the University of Cologne in Germany, who led the research.
The reason for the difference is that a saltwater ocean is electrically conductive and creates a secondary magnetic field that would suppress the effects of Jupiter's magnetic field.
The new technique of looking to aurorae for signs of a liquid ocean could lead to discoveries of water on bodies far beyond our solar system, researchers say.
"Imagine a magnetically active star with a planet close by," said Heidi Hammel, executive vice president of Assn. of Universities for Research in Astronomy. "By monitoring the auroral activity on that exoplanet we can infer the presence of water."
A telescope larger than Hubble may be required to observe distant aurorae, but "now we have a tool that we didn't have before," she said.
What you think guys? This moon is too far away from our world. And also, Ganymede's average orbital speed is very slow than our world;
World's average orbital speed 29.78 km/s (107200 km/h)
Genymede's average orbital speed 10.880 km/s
Is Ganymede our second direction for settle?
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