diff --git a/doc/research.md b/doc/research.md
index ae59e5c..edc2abd 100644
--- a/doc/research.md
+++ b/doc/research.md
@@ -4,7 +4,12 @@
 | ---- | ----------- | ---------------------- |
 | [Jupiter](https://en.wikipedia.org/wiki/Jupiter) | 69,911 | / |
 | [Metis](https://en.wikipedia.org/wiki/Metis_(moon)) | 21.5 | 128,000 |
+| [Adrastea](https://en.wikipedia.org/wiki/Adrastea_(moon)) | 8.2 | 129,000 |
+| [Amalthea](https://en.wikipedia.org/wiki/Amalthea_(moon)) | 83.5 | 181,365 |
 | [Thebe](https://en.wikipedia.org/wiki/Thebe_(moon)) | 49.3 | 221,889 |
+| [Io](https://en.wikipedia.org/wiki/Io_(moon)) | 1822 | 421,700 |
+| [Europa](https://en.wikipedia.org/wiki/Europa_(moon)) | 1561 | 670,900 |
+| [Ganymede](https://en.wikipedia.org/wiki/Ganymede_(moon)) | 2634 | 1,070,400 |
 | [Callisto](https://en.wikipedia.org/wiki/Callisto_(moon)) | 2410 | 1,883,000 |
 | [Himalia](https://en.wikipedia.org/wiki/Himalia_(moon)) (largest irregular) | 85 | 11,460,000 |