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View Full Version : Is Triton Hiding an Underground Ocean?



Fraser
2012-Sep-07, 05:00 AM
Voyager 2 mosaic of Neptune’s largest moon, Triton (NASA) At 1,680 miles (2,700 km) across, the frigid and wrinkled*Triton*is Neptune’s largest moon and the seventh largest in the Solar System. It orbits the planet backwards – that is, in the opposite direction that Neptune rotates – and is*the only large moon to do so, leading [...]

More... (http://www.universetoday.com/97239/is-triton-hiding-an-underground-ocean/)

publiusr
2012-Sep-07, 09:27 PM
Seventh largest? I thought only Titan and Ganymede were rivals in terms of size

Nereid
2012-Sep-07, 10:12 PM
Seventh largest? I thought only Titan and Ganymede were rivals in terms of size
At 2700 km in diameter (1350 km in radius), Triton isn't close to being #3.

For example, using Nine Planets (http://nineplanets.org/data1.html) as a source, here are the satellites larger than Triton (excluding Titan and Ganymede), radius in brackets (in km):

Callisto (2403)
Io (1821)
Moon (1738)
Europa (1565)

And, for completeness, Triton (1353).

Next? Pluto (1150), then Titania (789), ...

publiusr
2012-Sep-07, 10:14 PM
Wow--I don't know where I got that figure- Maybe initial guestimates were that Triton was larger than it turned out to be.