It probably spent nearly all of the past 4.5 billion years in a deep freeze beyond Neptune, inside the comet Wild 2 (pronounced VILT-two). Decades ago Wild 2 somehow got nudged into an orbit that ...

NASA has found something on Uranus and Neptune. The ice giants of the solar system have long been enigmas for science.

We'll see six planets – Mars, Jupiter, Uranus, Neptune, Venus and Saturn – but not all of them will be visible to the naked eye. You'll need high-powered binoculars or a telescope to see ...

Neptune, for example ... of CO ice will react with the hydrogen to form additional water, the carbon inside refractory ...