KDP categories · Top KDP authors
Stars & Planets: Amazon KDP category data
Amazon Books Best Sellers data for Stars & Planets, updated Nov 3, 2026: median price $9.99, median 3 reviews, average rating 4.7 and a KDPTop opportunity score of 19/100 (highly competitive).
| Price range (middle 50%) | $6.99 – $11.99 |
|---|---|
| Average rating | 4.7 |
| New releases (90 days) | 2% |
| Books on the list | 53 |
| Store | Books |
What stands out
- Its median reviews are 0% of the parent category Field Guides (748), one of the easier corners under it.
- Its review barrier is lower than in 94% of Books categories: the median best seller has only 3 reviews, so new books can chart with few.
- Only 2% of its best sellers are under 90 days old, fewer than in 94% of Books categories: established titles hold the list.
Top 10 Stars & Planets best sellers
-
Knowledge Encyclopedia - Our Planet Earth (Knowledge Encyclopedia For Children)
- List rank#1
- Price$16.91
- Rating4.8
- Reviews536
-
Guide to the Stars
by Ken Graun
- List rank#2
- Price$24.95
- Rating4.7
- Reviews2,031
-
Solar System Coloring Book For Kids, Planets Coloring Book
by Robert Adventure
- List rank#3
- Price$9.99
- Rating4.7
- Reviews193
-
Celestron Sky Maps – Seasonal Star Charts for Stargazing | Learn Constellations & Deep-Sky Objects, Learn the Night Sky, Constellation Guide, Beginner Friendly, Planisphere
- List rank#4
- Price$30.95
- Rating4.5
- Reviews475
-
Space Coloring Book For Toddlers Age 2-5: 30 Fun and Simple Galactic Designs for Toddlers and Kids
by Cheeky Reads
- List rank#5
- Price$5.99
- Rating4.8
- Reviews8
-
Celestial Journal | Sun and Moon journal diary notebook |: 150 Pages (6 x 9 inches ) lined notebook
by Celestial Notebooks
- List rank#6
- Price$5.95
- Rating4.6
- Reviews41
-
The Star Guide: A Unique System for Identifying the Brightest Stars in the Night Sky, Revised, Celestial Sport Edition, Vol. 1: Introduction, Rising Stars of Winter
by Steven Larsen Beyer
- List rank#7
- Price$13.99
- Rating3.9
- Reviews12
-
Our Solar system - Workbook For Kids: Children's Interactive Learning Worksheets About Space, the Planets, Stars, Moon, Sun, Milky Way, And More!
by Kay Fleming
- List rank#8
- Price$15.99
- Rating4.8
- Reviews14
-
Space Technology and Our Solar System! – Fun & Facts Coloring Book: 30 original illustrations and over 125 cool facts! (We Can Color! – Fun & Facts Educational Coloring Books)
by Daniel Gershkovitz
- List rank#9
- Price$9.99
- Rating4.8
- Reviews83
-
Composition Notebook College Ruled: Vintage Astronomy Planet Saturn & Its Moons Illustration | Science Aesthetic Journal for School, College & Work
by Charlotte Liberty
- List rank#10
- Price$7.99
- Reviews-
FAQ
Is Stars & Planets a good niche for Amazon KDP?
Its KDPTop opportunity score is 19/100, which makes it highly competitive. The median best seller has 3 reviews and sells for $9.99.
How many reviews do you need to rank in Stars & Planets?
The median best seller has 3 reviews, and 91% of them have fewer than 100.
What do Stars & Planets best sellers cost?
The median price is $9.99; half of the best sellers are priced between $6.99 and $11.99.
Can new books break into Stars & Planets?
2% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.