Hermione would probably be worried at first but then start researching all she can about space magic. Ron would be a bit more skeptical but also excited for Harry. They might try to find a way to communicate with him while he's in space, using some sort of enchanted device.
Hermione would immediately start gathering all the books she could find on space and magic to see if there are any known cases or theories. She would be constantly worried about Harry and try to come up with ways to ensure his safety. Ron, on the other hand, would be in awe of Harry's courage. He would tell everyone at Hogwarts about Harry's space adventure. And together, they would try to find a way to use the magic of the wizarding world to keep in touch with Harry. They might even attempt to build a magical telescope that can not only see Harry in space but also send messages to him through some sort of spell - powered communication system.
His friends would have a mix of reactions. Hermione would likely start making a list of all the things Harry should be careful about in space, like different magical and non - magical threats. Ron would be joking about Harry meeting space trolls or something like that. But deep down, they would both be proud of Harry for taking on such an out - of - this - world adventure and would support him as much as they could from Earth, maybe sending him care packages filled with wizarding treats and useful spells.
His other friends from Hogwarts might not even believe it at first. They might think it's some kind of elaborate prank. But once they realized it was real, they might try to find a magical way to communicate with him in Skyrim, or even try to open a portal to bring him back.
Hermione would probably be a bit worried at first. She might think it's a waste of time compared to studying magic. But then she'd see the benefits of physical fitness and start to support him. Ron, on the other hand, would probably make fun of him a little but also be secretly impressed.
He might be very sad at first. Harry has always valued his friends, so being forgotten by them would be a huge blow.
Well, he might use his magic to adapt to the zero - gravity environment. Maybe he could create some sort of magical shield around himself to protect from radiation. And he could encounter strange alien creatures that he tries to understand using his knowledge of magic and the wizarding world.
His friends would be extremely worried. Hermione would immediately start researching every possible spell or charm that could be used to find him. She might also look into any historical records of similar disappearances during Auror missions.
Their friends from the Order of the Phoenix would be overjoyed and offer protection. Neville might give them some special plants that are good for a magical household with a baby. Luna would share her unique and sometimes strange but helpful insights about the baby's future.
The kids in Konoha like Naruto would probably be very excited. They love new and different things, and Harry with his magic would be really cool to them.
Ginny would be protective. If there were any fanfictions that she thought were disrespectful to Harry or painted him in a bad light, she'd be angry. But she'd also enjoy the ones that showed the depth of his character and his relationships with others, especially the ones that highlighted his relationship with her.
Perhaps he would befriend the outcasts at Nevermore. The ones who are different from the rest and understand what it's like to be in a new and strange place.
Hermione would probably be very interested in learning about the religious aspects of the church. She'd start reading any religious texts available and try to understand how it all fits in with the Muggle world. Ron, on the other hand, might be a bit more uncomfortable. He's used to the wizarding world and all this Muggle religious stuff would seem a bit strange to him.