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Solar System (Astronomy & Space Science, Kindle eBooks): Amazon KDP category data
Amazon Kindle eBooks Best Sellers data for Solar System (Astronomy & Space Science, Kindle eBooks), updated Nov 3, 2026: median price $5, median 2 reviews, average rating 4.4 and a KDPTop opportunity score of 22/100 (highly competitive).
| Price range (middle 50%) | $2.99 – $8.91 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 23% |
| Books on the list | 100 |
| Store | Kindle eBooks |
What stands out
- Its median reviews are 0% of the parent category Astronomy & Space Science (610), one of the easier corners under it.
- Its review barrier is lower than in 95% of Kindle eBooks categories: the median best seller has only 2 reviews, so new books can chart with few.
- 23% of its best sellers came out in the last 90 days, more than in 90% of Kindle eBooks categories: readers here keep buying new titles.
Top 10 Solar System best sellers
-
Earthbound: The Obstacles to Human Space Exploration and the Promise of Artificial Intelligence
by Dennis Meredith
- List rank#1
- Price$0.99
- Rating5.0
- Reviews2
-
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#2
- Price$4.99
- Rating4.6
- Reviews187
-
50 Things to See on the Moon: A Stargazer's Guide
by John Read
- List rank#3
- Price$9.99
- Rating4.7
- Reviews413
-
How To Develop The Moon
by Ian Long
- List rank#4
- Price$0.99
- Rating4.4
- Reviews33
-
Birth of Earth: A Deep History of How Our Planet Formed (The History of Earth Book 1)
- List rank#5
- Price$6.99
- Reviews-
-
Fascinating Facts Book of Moon's Mysteries: Mind-Blowing 500+ Moon Mysteries & Discoveries: A Family-Friendly Lunar Guide with Research References (FUN & INTRIGUING FACTS BOOKS SERIES)
- List rank#6
- Price$2.99
- Rating4.0
- Reviews37
-
VENUS: Earth’s Lost Twin: Inside the Hottest Planet, Its Mysterious Past, the Search for Life, and Humanity’s Future Above the Clouds
by Ruth Sinaid
- List rank#7
- Price$4.35
- Reviews-
-
The Formation of the Solar System: From Kant and Laplace to Nice and Grand Tack (A Short Guide to the Planets)
by Christopher Seddon
- List rank#8
- Price$0.99
- Rating4.0
- Reviews1
-
-
The New Space Age: Coming Decades of Deep Space Exploration and the Most Audacious Missions (Wonders of Deep Space)
- List rank#10
- Price$3.49
- Reviews-
Same niche in Books: Solar System
FAQ
Is Solar System a good niche for Amazon KDP?
Its KDPTop opportunity score is 22/100, which makes it highly competitive. The median best seller has 2 reviews and sells for $5.
How many reviews do you need to rank in Solar System?
The median best seller has 2 reviews, and 87% of them have fewer than 100.
What do Solar System best sellers cost?
The median price is $5; half of the best sellers are priced between $2.99 and $8.91.
Can new books break into Solar System?
23% 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.