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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LoLo
San Leandro, US
★★★★★ 3
Color is off
Color: Bronze
I love the purse. The material is soft and the purse holds a lot. However the color wasn't close to what I ordered. Luckily I had a dress to match.
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Reviewed in the United States on April 16, 2026
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mo
Belleville, US
★★★★★ 5
Beautiful and sleek black hobo bag!
Color: Black, Size: One Size, Color: Black, Size: One Size
This purse is absolutely lovely for the price! Such a cute hobo bag, yet is modern and sleek to make any outfit look polished. It is super soft and has a faux leather texture with a beautiful sheen to it. It seems like great quality and if it ever gets saggy or old, it's cheap enough to replace easily. I love the gold hardware and it also has a lovely gold metal label of the brand on the outside making it look expensive. Also the strap is thick enough that it is quite comfortable on the shoulder. The only gripe I have is that it looked a bit bigger online, it fits about as much as a tote bag would; also the pockets inside are a bit small, but overall, I LOVE it!
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Reviewed in the United States on March 22, 2026
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Ava Zola
Dallas, US
★★★★★ 5
So spacious, great school bag
Color: Black, Size: One Size
I love this bag! I was looking for a bag that would hold my laptop without looking like a school bag, and this is perfect for the job. It fits my MacBook, granted it’s a tight fit with the case on, and it’s like a bottomless pit. I lose things in there so often, it’s so big. I’ve been using it for months now and it’s showing pretty much no signs of wear, and it’s pretty lightweight until I put my school things in it. It has two pockets on the interior, one open one on the side and one that zips up on the other side. The one that zips holds a decent bit. I held a ton of makeup in it before I decided I needed something better and that I was making it poke out too much. I don’t use the other side as much. I hold a couple of things in it, but nothing that can easily slip out. Ultimately, this bag is sleek and easy to carry around, it’s also not uncomfortable to wear when holding heavy things. I feel like skinny straps always dig into my arm, but this one is comfy. I liked it so much that I got another one in red as well. Overall, it’s a great bag and I recommend it to anyone who needs a Mary Poppins bag to hold a lot of things.
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Reviewed in the United States on March 14, 2026
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Paige McKenzie Herndon
Birmingham, US
★★★★★ 5
spacious, pretty and super sturdy!!
Color: Burgundy, Size: Large
soooo nice I’m obsessed! I treat my purses like black holes but I wanted something I could customize to my liking and it’s big enough I added a bunch of small bags inside to separate things and it’s still so spacious, and the wine color is my fave this season
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Reviewed in the United States on March 21, 2026
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Camy
Waukegan, US
★★★★★ 5
Love it
Color: Cream, Size: Large
I love this purse, not too big and not too small. I love the soft leather and also because I can use it when I dress up and or dress down, looks good either way. And the makeup purse is a great addition to help keep all my things together. Love it
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Reviewed in the United States on February 24, 2026

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