Saturn’s majestic rings will vanish in just six months from now

www.earth.com

Note: The title is a bit clickbait (they'll merely become invisible from our line of sight), but I'm not going to editorialize the article title.

Come March 2025, Saturn's majestic rings will become virtually invisible to earth-based observers. This phenomenon occurs due to the unique tilt of Saturn's axis, which will position the rings edge-on to our line of sight. [...] Saturn's axial tilt, which is the angle its axis leans compared to its orbit around the Sun, is about 27 degrees. As Saturn moves during its 29.5 year orbit around the Sun, this tilt means different parts of its rings and moons get sunlight at different angles, changing how they look. So, the rings are not really disappearing but rather playing a celestial game of hide and seek. At their reappearance, we can also enjoy an accentuated view of Saturn's moons.

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- That's not a stupid question at all. Was curious myself, and found this: https://sciencing.com/close-rocks-saturns-rings-13152.html
  Compared with most other astronomical objects, the ice and rock particles in Saturn’s rings are extremely close together. On average, about 3 percent of the total volume of the disk is occupied by solid particles, while the rest is empty space. This may sound small, but it means the typical separation between particles is only a little over three times their average diameter. Assuming a value of 30 centimeters for the latter, the rocks would be as close as one meter away from each other. There is no hard and fast rule, however, due to density variations across the rings and the wide spectrum of particle sizes.
  It would seem that the particles in Saturn's rings are more like the movie portrayals of asteroid fields: dangerously close together, and you wouldn't want to try to fly through them.
  
  What if you had a giant vacuum nozzle at the front and shoot the ice particles out the back of your rocket? :D
  Hmm that might actually not be so stupid. First there must be some gas pressure since water ice would sublimate otherwise, so that actually should help gather and guide particles.
  Then if you would go slow enough the forces should be minimal and you could mine the water ice this way. Or extract solids and turn the water into big blocks of pykrete to reinforce the nozzle. Or use the blocks of ice to build a space habitat. Or accelerate waste out the back to accelerate again. You'd only need a reactor with enough power.
- Cassini got some great pics of Saturn's rings too
  https://photojournal.jpl.nasa.gov/mission/cassini?subselect=Target%3ASaturn%3ASpacecraft%3ACassini+Orbiter
- You can try that on Elite Dangerous.
Saturn's rings regularly "disappear". Even Galileo noticed, although he had no idea what was happening.
In 1612 the Earth passed through the plane of the rings and they became invisible. Mystified, Galileo remarked "I do not know what to say in a case so surprising, so unlooked for and so novel." He mused, "Has Saturn swallowed his children?" — referring to the myth of the Titan Saturn devouring his offspring to forestall the prophecy of them overthrowing him. He was further confused when the rings again became visible in 1613. (From Wikipedia).
Wikipedia has a great image of orientations on the dates of Saturn's opposition from 2001 thru 2029 (copied below). It really shows what's going on and the approximate timing of visibility of the rings as they change from a Northern to Southern view from Earth's perspective. Between March and November of 2025 the rings will be in the least visible orientations.

8 comments