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Description
Ultraviolet Astronomy and the Quest for the Origin of LifeUltraviolet Astronomy and the Quest for the Origin of Life addresses the use of astronomical observations in the ultraviolet range to better understand the generation of complex, life precursor molecules. The origin of RNA is still under debate but seems to be related to the generation of pools of complex organic molecules submitted to heavy cycles of solution in water and drying. This book investigates whether these cycles require a planetary surface
Ultraviolet Astronomy and the Quest for the Origin of Life addresses the use of astronomical observations in the ultraviolet range to better understand the generation of complex, life-precursor molecules. The origin of RNA is still under debate but seems to be related to the generation of pools of complex organic molecules submitted to heavy cycles of solution in water and drying. This book investigates whether these cycles require a planetary surface or may occur in space by examining both the theoretical and observational aspects of the role of UV radiation in the origin of life. This book offers the latest advances in these studies for astronomers, astrobiologists and planetary scientists.
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4.2 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
Great, Affordable, Pump Sprayer
Size: 1-Gallon
This is an affordable pump pressure sprayer. It works the same as, if not better than, other higher priced sprayers I have used. Itnis easy to clean and has an adjustment tip to change the amount of spray and width of spray. With it only being 1 gallon it is easy to carry while walking the perimeter of my home to spray for pests.
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Reviewed in the United States on May 29, 2026
★★★★★ 4
Good
Size: 1-Gallon
I’ve used this sprayer for applying fertilizer, insect control, and watering plants, and overall it works really well for basic lawn and garden jobs. The pump builds pressure quickly, and the adjustable nozzle gives a nice range from mist to stream. I also like the translucent tank because it makes it easy to see fluid levels while mixing.
The anti-clog filter is a nice feature and helped keep the spray consistent during use. It’s lightweight and comfortable to carry around the yard.
The only reason I’m giving 4 stars instead of 5 is that some of the plastic parts feel a little lightweight, and I noticed a slight drip from the nozzle after extended use. Still, for the price and performance, it’s a solid sprayer and gets the job done well.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Impressed so far
Style: Standard Grip, Size: 25ft, Color: Chartreuse
I have a large back yard, a pool and a stationary hose reel bolted to the house that holds around 250 feet of hose (depending on the hose). During the summer especially, we use this hose a lot. The reel had 200 feet of pretty good quality, heavy duty residential hose on it. That hose lasted over 20 years but was starting to show it's age and had been repaired several times. What's more, my wife hated the stuff. Her primary complaint was how heavy it was. She really struggled to drag it around the yard or wind it back on the reel. So it was time to replace it. My criteria: brass fittings, reasonably heavy duty and durable, decent price. Her criteria, lighter! So I searched the reviews and looked at damn near everything amazon sells and picked this stuff. I ended up buying two 50 foot hoses and one 100 foot hose.
So, here's what I think. The hose ends are heavy duty brass and well crimped. The little bits of plastic sleeve on each end are just branding and don't provide any other useful purpose. This isn't a criticism, just an observation. I cut them off. As others have mentioned, the female fittings are crimped a little tight. This makes it somewhat difficult to tighten them without twisting the hose. I put a little white lithium grease on mine and held the things in my hand - twisting back and forth until they lubed up and loosened up. No harm, no foul, I'd rather a little tight than loose. Once that was done, I connected all the sections and stretched the whole thing out in the yard. I connected one end to the faucet (hose reel), slapped a nozzle on the other end and turned on the water. It was a warm summer day, I let the hose fill with water and then went down the entire 200 foot length untwisting and straightening it all out. Then I left it bake in the sun for a couple hours under pressure. After that I turned off the water, and started inspecting the hose. I have about 80lbs of water pressure, left under pressure and cooking in the sun, the hose definitely swelled a little diameter wise, but no bulges or anything untoward. Connections all looked good, no leaks or malfunctions. So, I turned off the water and took off the nozzle and started winding it up on the reel. Now right away I could tell that this stuff was more pliable and significantly lighter then the hose it replaced. I carefully spooled it up on the reel and threaded a brass shutoff and brass quick connector on the end. That was the middle of June, 2023. It's now December 2023.
The verdict. I like the stuff, and more importantly, so does my wife. From my perspective, I like the color, it's easy to see and find in the grass, I don't trip over it or worry about not seeing it before I run over it while cutting the grass (you can laugh, but that accounted for one of the previous "repairs" I mentioned earlier). Now, when you pull hose off a reel, it tends to come off pretty straight, which automatically alleviates a bunch of twisting and kinking issues. Still, as you drag this stuff around the yard it keeps its shape pretty well and doesn't twist up or kink. It's flexible and yet "stiff" enough to drag around corners without issue. The hose itself has definitely faded a little colorwise, the end that gets the most use is less orange then the hose that spends most of its time wrapped on the reel, but not unduly so. After a summer of use, I'd have to say it's held up well, without any signs of terminal wear and tear. What does my wife think? She loves the stuff. It's much easier for her to use and wind back up. She really is the primary user, she does 90% of the pool "stuff", plant tending, gardening and watering. If she likes it, I'm good. So, we'll see, in a couple more years, if this hose doesn't hold up, I'll come back and let you know. For now I'd have to say, if you need a new hose, try this stuff.
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Reviewed in the United States on October 12, 2024
★★★★★ 5
Great hose!
Style: Standard Grip, Size: 100ft, Color: Chartreuse
5 stars without hesitation. This Flexzilla Garden Hose 5/8 in. x 100 ft. is legitimately one of the best hoses I’ve used. It’s actually flexible like advertised, doesn’t fight you every time you move it around, and it feels way more durable than the cheap stiff hoses from big box stores. I honestly don’t understand a lot of the complaints, mine has held up great, doesn’t kink nearly as bad as others I’ve owned, and is super easy to coil up. Solid hose.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
If you want to buy your last hose then flexzilla is your hose.
Style: Standard Grip, Size: 50ft, Color: Chartreuse
O.K. if you are reading my review I can honestly say that I don't think anyone knows what they are buying with this hose like I do as Amazon has the record of when I bought 100 feet of this hose. Long Long Long term user=purchased in 2017. I used this hose today and it looks-feels-works like it did the day I hooked it up on my reel. So flexible you can use it for a tourniquet if required. Hot-cold it don't matter this hose is the best. I am 70 yrs. old and it is the best hose I ever used in my life. Buy this hose once and then be done. Never kinks and not to heavy when moving around. Buy some and get on with whatever work you need to wash and then roll it up and forget about it.
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Reviewed in the United States on May 22, 2026
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