Not Really Science Per Se ...

[Kekerusey]

... but it's fun to play with

Gravity

... try larger particles and click and/or drag like crazy

Keke

[Swoka Ikran]

This brings back some memories from when I was like 10...

I used to have some software that this...no clue what happened to it though Good to see there's a web version of it now

[Eana Tanhì]

this is so fun, I could play with it whole day irayo 

[Human No More]

Irayo, ma tsmukan!
This is great

[Tswusayona Tsamsiyu]

irayo nìtxan ma tsmuk
this is awesome! I've never seen something like that before
I'm trying to create solar systems there but it's difficult
wish me luck

[Tswusayona Tsamsiyu]

the difficulty in creating solar systems in it is that if the object is big or smaller it has nearly no gravity. but when you create a massive object it swallows most of your objects. also the orbiting objects should not influence each other or the entire thing will break and everything will fly away.

also I made a few dual star systems in which two giant stars orbit each other (their gravitational center).

[Human No More]

I made a binary star but couldn't get any planets