Why?
Actually, it’s a ring of debris that encircles the planet; Jupiter has one too, but it is less prominent.
Is there one on Uranus?
It’s a little hard to tell from this angle.
I won’t speak for anyone else, but my Saturn has a tendency to lift off the ground at speeds over 140 mph.
I think spoilers have been discussed around here before. IIRC the consensus was they were close to useless on almost any street car. They only become effective when at speed (highway speeds at least). For the most part spoilers are for looks and some block visibility out the rear window making them more a liability than a useful add-on.
My car has a spoiler but not because I especially wanted one. It was just that the car I wanted with all the options I wanted also had a spoiler. When reading up on my car the spoiler reduces the drag coefiicient a tiny amount (like from .28 to .27 or something like that). Given that the spoiler was built for that model of car (not an after market deal) I actually like the look of it and it does not impede my view out the rear window barely at all. If you took it off however I doubt I’d notice any difference in the driving characteristics of my car.
In other words, the coefficient of dorkiness (Cd) equals the dork (D) divided by one-half the product of how much attention (A) he can attract with a ridiculous ®, square vehicle (V[sup]2[/sup]).
I’m going to put a spoiler on a minivan someday. That’ll look fly.
A ring of debris around Uranus would be a cause for concern.
Appreciating the humor, I still am wondering: have they beefed up the engines on Saturns recently to justify this sort of add-on? What’s the max hp you can get in a Saturn engine?
It’s the max speed you need to be concerned about (which horsepower relates to but they aren’t the same thing). In my old Datsun 200SX I noticed the car would start to ‘float’ around 85 mph and I’m sure a Saturn could do that as well. Of course where the car starts to lift off the ground has a lot to do with the design of the car and a spoiler only helps somewhat in keeping you on the ground (don’t you need an air dam too?). The manufacturere claims my car has a zero lift body so supposedly it’ll never start to lift off the ground even without the spoiler.
Interestingly Indy class cars spoilers provide so much downforce that at something like 170 MPH and above the downforce exceeds the weight of the car. In other words above that speed you could drive one upside-down on a ceiling without falling off (just don’t slow down).
Depends on the spoiler. Many spoilers don’t do anything (I’ve seen a few with an AOA pointing up!).
Max speed on a street car is not an issue since most vehicles are limited to less than 140 mph. The lift in the car as more to do with ground clearance and front cross section, a rear spoiler would actually tend to help lift the front of the car up a little (well, not enough to make a difference but hey).
And you wouldn’t be the first with a spoiler on a mini-van Achernar. My matrix has an aftermarket spoiler available for it and I’ve seen a Grand Yoyager with one as well. Heck, I’ve seen an Echos with 'em as well.
Thanks for the informative answer, Whack-a-Mole.
So Tommy Lee Jones really could drive that car upside down in the Holland Tunnel in Men in Black.
When I bought my Saturn, that was an option.
I blurted out a laugh so loud the salesman got pissed off and said, “some people like the way it looks.”
It’s purely for looks. Saturn’s brochures used to say so and made no pretense that it was there for anything else.
We bought a used Saturn abt 6 months ago. The one we chose has a spoiler. It just looks so much cooler than the same model sans spoiler. We even joked with the salesman along the lines of, “Now, will you guarantee that we won’t lift off the ground below 175 MPH?”
hrh
My '95 Saturn SC2 had a spoiler. The 2-liter DOHC engine only made about 120 HP, but the car was so light (or flimsy, your call) that it was pretty fast. Not fast enough that the spoiler did much, I’m sure, but don’t scoff. 
My '85 Toyota MR2 only made 115 HP, but it was lighter than the Saturn and a little faster. MR2s from that era just don’t look right without a spoiler.
The only way a Saturn will go 140 MPH is if you push it out the back of an airplane.
If the gearing is right, just about any car will go 120-140.
Heck, stock my friend got his Civic up to 125+.
I’ve gotten my bone stock 93 Camry (automatic) up to around 110.
I think those are wings, not spoilers. Spoilers disrupt or “spoil” the clean airflow, reducing drag and lift. I don’t see how it can create a downforce.