Saturn is the jewel of the solar system with its magnificent rings and strange satellite retinue. It is the darkest planet visible to the naked eye and is technically Uranus. sometimes It’s bright enough that you need good eyesight and a very dark spot, but it’s still fairly easy to spot among the stars.
If you are an early riser (or late sleeper), now is a good time to look for Saturn. Not because Saturn is brighter than usual, or because it’s closer to Earth, but because it’s been in the news lately. The new study shows that the rings are relatively young cosmologically, and astronomers also found that Saturn holds the current record for the largest number of moons across one pass of small Saturnian moons. He also announced the discovery of
Saturn now rises above the horizon early in the morning local time, rising high enough to be visible low in the southeastern sky about an hour later. If you wake up just before dawn, you’ll be about 25 degrees above the horizon, or about 2.5 times the width of an outstretched fist. This is a common unit of measurement among astronomers. Not to be confused with the nearby star Fomalhaut, which is closer to the horizon than Saturn and has about the same brightness. Jupiter is closer to the eastern horizon (bottom left of Saturn for Northern Hemisphere observers), but 15 times brighter and much easier to spot.
If you want to avoid predawn observation, in this case waiting is fine. Saturn’s rings and moons will not disappear (on human timescales anyway). And as summer progresses, the planet rises faster and higher in the sky at a more opportune time. For example, it rises around midnight in many places by late June and reaches its sky-observing sweet spot by late August. That is, it rises at sunset and stays awake all night.
When viewed through binoculars, Saturn may appear elongated or oval because of its rings. A clear observation from a small telescope makes the rings appear more vivid. With this you may also be able to find some of the planet’s moons. Its largest Titan is larger than Mercury and is usually visible as a faint “star” adjacent to Saturn.
If you dare to observe a gas giant early in the day, take some time to think about what you’re actually seeing. This pale, glowing sphere is small enough to be found in our skies, but it is a gigantic entity nine times wider than her on Earth and 95 times more massive than her. And despite centuries of observation, we are still researching this circular wonder.
Saturn is iconic among its sibling planets, of course, thanks to its rings. Jupiter, Uranus, and Neptune all have rings, but they are thin and faint and difficult to see without spacecraft or powerful telescopes. Saturn’s rings are 175,000 miles (282,000 kilometers) in diameter, three-quarters of her distance between Earth and the Moon.
Although Saturn’s rings appear solid, they are actually composed of countless clumps of nearly pure water ice, likely the remnants of a shattered moon. The largest chunks are probably less than 10 meters in diameter, and most are about the size of ice cubes in drinks. Although the rings appear to have changed very little since humans began observing them with telescopes in the 1600s, their age and lifespan have been the subject of controversy among experts for most of that period. rice field.
Recently, there is growing evidence that these rings are much younger than the Earth itself, which is about 4.5 billion years old. The Cassini mission provided much of the data for this. The spacecraft orbited the Earth during her 13 years, transmitting a wealth of information to Earth.
A new study has just been published in the journal Planetary Science Icarus, This reinforces the idea that rings aren’t just young, they’re lasting forever.
Micrometeoroids (tiny rocks in space that fly around our solar system) were key to this new chronology. When they collide with particles in Saturn’s rings, there are two overall effects. One is that micrometeorite dust is polluting and darkening the ring’s pristine water ice. Second, these small collisions steal orbital energy from the ring particles, causing them to react and move inward toward Saturn. These effects should foul the particles of the ring over time and eventually rain down on Saturn itself.
Armed with Cassini data, scientists quantified these effects and found that the rings were probably not older than about 120 million years, rather young for a planetary system. To put this into perspective, if early Cretaceous dinosaurs had invented telescopes, they would have seen Saturn without its rings.
The researchers also found that the ring is eroding at a rate that means it will disappear within 15 to 400 million years from now. That’s a long time by human standards, but it’s still only a fraction of the age of the solar system.
Ironically, while Saturn’s rings are disappearing, the number of moons appears to be increasing. It’s neither literal nor physical. We’re just getting better at finding them.
Scientists have announced the addition of 62 new moons around Saturn. This brings the total number of Saturns to over 140, well above the previous record-holding record of about 90 for Jupiter.
In fact, researchers spotted many of these moons in observations made in 2019 using clever techniques to increase their visibility, but these smaller moons are so dim that they don’t appear very often between observations. didn’t move. To confirm them, astronomers needed more data. Over the past two years, they’ve done just that, pinpointing the reality of satellites, most of which are only a few kilometers in diameter.
How many moons does Saturn actually have? Well, it depends on what you mean by “moon.” There are certainly hundreds, perhaps thousands larger than a kilometer. But if we count each particle in the ring as a month, the answer is: Trillion. The problem here is that we don’t have a good definition of what constitutes a moon, especially what the lower size bounds are. In that sense, trying to decide which planet has the most stuff is a bit silly.
Still, if you’re out early and gazing at Saturn in the predawn spring skies, remember that you are now armed with knowledge that would make astronomers envy of only a few decades ago. . Hundreds of mountain-sized moons orbit Saturn. Its annual rings are young and fleeting. We are lucky to see them, in the truest sense of the word.
