In Depth | Neptune – NASA Solar System Exploration
Neptune took shape when the rest of the solar system formed about 4.5 billion years ago when gravity pulled swirling gas and dust in to become this ice giant. Like its neighbor Uranus, Neptune likely formed closer to the Sun and moved to the outer solar system about 4 billion years ago.
In Depth | Our Solar System - NASA Solar System Exploration
Meanwhile, materials we are used to seeing as ice, liquid, or gas settled in the outer regions of the young solar system. Gravity pulled these materials together, and that is where we find gas giants Jupiter and Saturn, and the ice giants Uranus and Neptune.
The Atmospheres of the Ice Giants, Uranus and Neptune
We believe many important atmospheric science questions can only be addressed by studies of the ice giants Uranus and Neptune. These questions relate to fundamental atmospheric processes that help us understand the formation, evolution, and current structure of all planets.
Gravity Assist: Ice Giants (Uranus & Neptune) with Amy Simon
2018年1月17日 · Beyond Saturn are two of the most misunderstood and bizarre planets in our solar system—the “ice giants” Uranus and Neptune. Did you know that Uranus has rings and appears to spin on its side? And that windy and intensely blue Neptune once had an Earth-sized Great Dark Spot?
Recipe for Neptune Revealed by Scientists - NASA Solar System …
2000年10月26日 · Recent revision of the Jupiter and Saturn data has led scientists to reexamine the data from all the outer planets and has revealed that the gas giant planets' main compositions are almost identical to that of the Sun.
In Depth | Jupiter – NASA Solar System Exploration
As a gas giant, Jupiter doesn’t have a true surface. The planet is mostly swirling gases and liquids. While a spacecraft would have nowhere to land on Jupiter, it wouldn’t be able to fly through unscathed either.
Cassini Spies the Ice-Giant Planet Uranus - NASA Solar System …
2014年4月30日 · The planets Uranus and Neptune are sometimes referred to as "ice giants" to distinguish them from their larger siblings, Jupiter and Saturn, the classic "gas giants." The moniker derives from the fact that a comparatively large part of the planets' composition consists of water, ammonia and methane, which are typically frozen as ices in the ...
In Depth | Uranus – NASA Solar System Exploration
Uranus took shape when the rest of the solar system formed about 4.5 billion years ago – when gravity pulled swirling gas and dust in to become this ice giant. Like its neighbor Neptune, Uranus likely formed closer to the Sun and moved to the outer solar system about 4 billion years ago, where it is the seventh planet from the Sun.
What's Next | The Grand Finale - NASA Solar System Exploration
2025年1月9日 · Collectively, Uranus and Neptune are referred to as ice giant planets. In spite of that name, relatively little solid ice is thought to be in them today, but it is believed there is a massive liquid ocean beneath their clouds, which accounts for about two-thirds of their total mass.
Planetary Formation and Evolution Revealed with a Saturn Entry …
The determination of Saturn's atmospheric noble gas abundances are critical to understanding the formation and evolution of Saturn, and giant planets in general. These measurements can only be performed with an entry probe.