As most users likely know, in Star Wars: A New Hope¹, Luke flees Obi Wan Kenobi's cave when he realizes his Uncle Owen and Aunt Beru might be in danger from the Imperial stormtroopers, who are searching for R2-D2 and C-3PO. Luke arrives back at the farm and finds Owen and Beru's skeletal remains; they have indeed been brutally murdered. The Wookieepedia page on Owen Lars says much the same:
During the early years of the Galactic Civil War, Owen and Skywalker purchased the droid R2-D2, who, unbeknownst to them, possessed the plans for the Death Star, an Imperial superweapon. Soon after, Imperial stormtroopers tracked the droid to the Lars homestead, where they interrogated and murdered Owen and Beru. When Luke found his family was killed, he left Tatooine with Kenobi to train as a Jedi, joining the Rebel Alliance and destroying the Death Star in the Battle of Yavin.
Why did Luke just abandon Owen and Beru's remains? Both the Wookieepedia and A New Hope (the movie) suggest that Luke discovered his dead aunt and uncle, but then immediately left with Obi Wan without taking care of his aunt and uncle's remains. We certainly see no grieving process on Luke's part, and while I understand the story isn't meant to focus on that, that scene in the movie did make me curious. Do any of the novels address this question, or perhaps the TV series (although I suppose the Clone Wars preceded Luke's era ...)? Does Luke's canon characterization lend itself to leaving loved ones' bodies exposed and abandoned after death?
The Wookieepedia also notes that Owen (presumably) helped to bury Shmi, and later his brother Cliegg, on the farm:
Once Owen introduced himself and Beru to Anakin, Cliegg told the Jedi about Shmi's kidnapping, telling him that she was dead. Anakin, refusing to believe this, borrowed Owen's swoop and tracked down the Tuskens; the next day, he returned with Shmi's corpse. The Lars family buried Shmi outside their home and held a quiet funeral.
Padmé received a very grand funeral, so we know end-of-life ceremonies and traditions aren't unheard of in Star Wars canon. So, yes, I'm curious if there's a canon explanation for Luke's behavior. If not, subjective answers in the spirit of Star Wars canon are welcome.
¹ My most favorite movie ever!