Study Reconsiders Possibility of Life on Uranus Moons
According to a new study, NASA's 1986 Voyager 2 flyby provided only a temporary understanding of Uranus’s magnetosphere. Back then, it revealed an unusually tilted and off-centered magnetic field, which has since been considered one of the most extreme in the solar system....
Facts
- According to a new study, NASA's 1986 Voyager 2 flyby provided only a temporary understanding of Uranus’s magnetosphere. Back then, it revealed an unusually tilted and off-centered magnetic field, which has since been considered one of the most extreme in the solar system.[1][2]
- However, a recent re-examination of the Voyager images suggests that Uranus’ magnetosphere was in a rare, compressed state due to unusually high solar wind pressure — a condition that occurs less than 5% of the time.[1][2]
- The researchers believe there are 'two magnetospheric cycles during solar minimum,' one due to the planet's 'extreme dipole tilt and obliquity,' and the other from 'quasiperiodically varying solar wind conditions.' They suggest Uranus' two outermost major moons, Titania and Oberon, 'orbit outside the magnetopause.'[1]
- This follows a related study on another one of Uranus’ moons, called Miranda, which suggested the presence of an unusually thin ice crust and a possible subsurface ocean, highlighting tectonic and possibly recent geological activity.[3]
- They surmise that Miranda is home to a no more than 30 km (19-mile) thick ice crust that has been thinned out by the moon's tidal forces, resulting in a potential 100 km (62-mile) or more deep subsurface ocean.[3]
- NASA is scheduled to launch a new mission to Uranus in about 10 years, which should arrive around 2045. The space agency's goal is to see whether Uranus' moons are capable of supporting life.[4]
Sources: [1]Nature, [2]USA Today, [3]Iopscience and [4]The Economic Times.
Narratives
- Narrative A, as provided by Youtube. This is tremendous news for those who wish to find life-sustaining environments on other planets. After 40 years of questions, we may finally learn that Uranus is not a barren ball of ice but rather the source of massive amounts of water.
- Narrative B, as provided by Space.com and NASA Science. While these discoveries are remarkable, let's not forget that discovering life on Uranus’ moons is unlikely due to the extreme cold climate, limited tidal heating, and the potential saltiness of subsurface oceans. This makes chemical energy for life hard to access without solar warmth.
