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Solar System (Astronomy & Space Science, Books): Amazon KDP category data
Amazon Books Best Sellers data for Solar System (Astronomy & Space Science, Books), updated Nov 2, 2026: median price $12.99, median 26 reviews, average rating 4.6 and a KDPTop opportunity score of 24/100 (highly competitive).
| Price range (middle 50%) | $10.77 – $18.95 |
|---|---|
| Average rating | 4.6 |
| New releases (90 days) | 12% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 1% of the parent category Astronomy & Space Science (1,911), one of the easier corners under it.
Top 10 Solar System best sellers
-
There's No Place Like Space! All About Our Solar System
by Tish Rabe
- List rank#1
- Price$5.98
- Rating4.8
- Reviews27,844
-
The Magic School Bus Lost in the Solar System
by Joanna Cole
- List rank#2
- Price$5.84
- Rating4.8
- Reviews1,486
-
50 Things To See With A Telescope - Kids: A Constellation Focused Approach
by John A Read
- List rank#3
- Price$12.44
- Rating4.7
- Reviews8,206
-
Cydonia: The Secret Chronicles of Mars
by David E. Flynn
- List rank#4
- Price$22.33
- Rating4.6
- Reviews112
-
Our Solar System! A Stellar Neighborhood (Our Universe, 8)
by Stacy McAnulty
- List rank#5
- Price$17.70
- Rating4.9
- Reviews50
-
Solar System for Kids: Explore Planets, Moons, Asteroids, and Comets—with Myth-Busting Facts, Space Missions, and Engaging Quizzes (STEM Books for Curious Kids)
by Max Finwise
- List rank#6
- Price$12.99
- Rating4.7
- Reviews66
-
Knowledge Encyclopedia - Space (Knowledge Encyclopedia For Children)
- List rank#7
- Price$18.63
- Rating4.8
- Reviews890
-
Solar System Stickers (Dover Little Activity Books: Nature)
by Bruce LaFontaine
- List rank#8
- Price$2.50
- Rating4.4
- Reviews473
-
SPACE FACTS FOR CURIOUS MINDS: 5,705 Astronomy facts about astronauts, planets, galaxies and everything in between with fun trivia
by PANTHEON SPACE ACADEMY
- List rank#9
- Price$10.99
- Rating4.6
- Reviews187
-
Project Mars. A Technical Tale: Including a Scientific Appendix, Calculations and Drawings by Von Braun
by Wernher von Braun
- List rank#10
- Price$32.90
- Rating4.5
- Reviews110
Same niche in Kindle eBooks: Solar System
FAQ
Is Solar System a good niche for Amazon KDP?
Its KDPTop opportunity score is 24/100, which makes it highly competitive. The median best seller has 26 reviews and sells for $12.99.
How many reviews do you need to rank in Solar System?
The median best seller has 26 reviews, and 73% of them have fewer than 100.
What do Solar System best sellers cost?
The median price is $12.99; half of the best sellers are priced between $10.77 and $18.95.
Can new books break into Solar System?
12% 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.