Aradia’s Sacrificial Slab was at the center of Derse because she’s a Derse dreamer and her body was there because she was dead before the game started. Her Quest Bed is on her planet.

Eridan destroyed it here. 

John created a new timeline and the pre-retcon characters were not affected.

Confirmed pre-retcon and post-retcon.

It’s how he emphasizes words. Since all his text is in caps it’s hard to know what he’s actually emphasizing. 

A Void session is when the players don’t prototype their kernel sprites pre-entry regardless of the players’ aspects. Even if you do have Time and Space players your session won’t succeed if it’s Void because the Battlefield won’t be able to grow and change without those prototypings. 

Yes, it’s canon. It was used by Hussie multiple times in his third recap.

What caused the Tumor to grow in their Battlefield is unknown but it was always meant to be used to create the Green Sun.

I thought it was closer to 400 years.

From the wiki page. 

Dirk’s bro had been dead for 200 years when Dirk’s meteor landed.