Mind the Gap
SKU: 35452806673

Mind the Gap

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Description

Mind the GapThis book is concerned with two tightly knit topics those of mathematics and astronomy. Its focus is primarily concerned with planetary astronomy, and specifically the history of accounting for the spacing of planetary orbits. The story begins with the ancient Greek philosophers and continues to the modern era and the new data being gleaned from the study of exoplanetary systems. Throughout the text, the manner in which mathematical theory has been

This book is concerned with two tightly knit topics - those of mathematics and astronomy. Its focus is primarily concerned with planetary astronomy, and specifically the history of accounting for the spacing of planetary orbits. The story begins with the ancient Greek philosophers and continues to the modern era and the new data being gleaned from the study of exoplanetary systems. Throughout the text, the manner in which mathematical theory has been used to decipher, and impose order upon the solar system, will be examined. Attention and discussion will be directed towards the so-called Titius-Bode rule, a long-standing ordering principle, that in fact it has no physical underpinning or explanation.

 

The story presented will look at how humanity has learned about the workings of the solar system, and it will look at the philosophical problems that arise when mathematical exposition leads observation. Furthermore, the fundamental role of mathematics in the development of physical theory is examined, and it is argued that there are some gaps in our knowledge of the solar system (and the universe) that mathematics and physical theory will never successfully bridge. The text will present material at the informed-amateur scientist, university undergraduate student level.

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SKU: 35452806673

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LYDIA KASS
Waukegan, US
★★★★★ 5
Squishy and comfy
Very well made bed. Had I known about Amazon Basics brand sooner, I would have gotten two of these earlier. The other bed I purchased was a Snoozer XL and it arrived in a super compact state; the filler was even compressed and is therefore not as squishy and comfy as this Amazon Basics bed. The dog pictured is about 41 lbs, so it's perfect for her size (my other dog is a 70 lb pittie and he also fits on the bed).The 'hood' does detach, whereas the Snoozer one is permanently attached. Having the hood detach for washing the cover was another plus for this bed. The zippers are heavy duty and the 'sheepskin' is soft (I haven't washed the cover yet, so I don't know if it will pill). This bed arrived ready to use out of the box (very basic packaging); the filler was not compressed, so the bed is definitely more fluffy. This is the XL size and it is smaller than the Snoozer XL size but fits the corner of my room better. This is definitely worth the money.
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Reviewed in the United States on September 23, 2020
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R. Gableman
Belleville, US
★★★★★ 2
I regret my purchase
Color: Blue, Size: Medium (Pack of 1)
A few things: 1) this bed is much smaller than you think. Even if you measure it the way it’s constructed makes the area under the flap super small. 2) my dogs, burrow under blankets, covers, everything. But they don’t burrow under this. It’s designed to be appealing to humans, but dogs don’t care for it. 3) you probably already read this another reviews, but the flap doesn’t really stay up at all. That wouldn’t be a problem for my dogs, but it may be for yours. My recommendation – don’t buy this. It’s a gimmick. They make others with larger areas under the flap that are more expensive, but it’s worth the money instead of wasting it on this.
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Reviewed in the United States on February 21, 2026
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ColleenRN
Carnegie, US
★★★★★ 5
Great price! Great Paper towel!
Package Size Name: XXL, Size: 150 sheet (Pack of 2)
These Amazon brand paper towels are great! They are the multi tear size, which is perfect for different uses. The price is good and they clean windows and glass wonderfully. Softness is so so, but if you don’t have an issue with that, then these are a great buy! I definitely recommend!
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Reviewed in the United States on May 23, 2026
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HD813
Lowell, US
★★★★★ 5
Strong, absorbent and a good price!
Package Size Name: XXL, Size: 150 sheet (Pack of 12)
These are good paper towels. Not thin at all. Strong, absorbent and capable of cleaning as well as the 'name' brand paper towels but at a much better price. I'm happy with them.
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Reviewed in the United States on May 5, 2026
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Kat B
Fort Morgan, US
★★★★★ 5
Works well
Package Size Name: XXL, Size: 150 sheet (Pack of 12)
There is nothing special about this product but it works fine. The only thing is that the paper towels are rough and thin, rather than a thick and soft. They fit perfectly on our paper towel rack so that’s nice. I recommend this product if you don’t care how your paper towels feel.
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Reviewed in the United States on April 28, 2026

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