Without a doubt the Ultramarines. They get all the hype from Games Workshop, and feature the most in terms or codex updates etc, and as a result, they are the most popular.
Space Marines are the most popular faction, within the Space Marine faction the Ultramarine chapter are the most used as they are Games Workshops poster boys. After the Space Marines it would be Chaos Space Marines and Orcs then Imperial Guard especially after the release of their new codex. Tyranids will have a new codex in January so their popularity may rise and by far the least played faction would be the Dark Eldar, this is because they haven't had a new codex or and significant update since about 1998
Depending an how you arm it and what Space Marine Chapter you use, the points vary wildly. In which to get an accurate cost & the most effective armament you should refer to Codex: Space Marine or the codex of the army you are using.
Marneus Calgar belongs to the Ultramarines, which is one of the most well-known and prestigious Space Marine Chapters in the Warhammer 40,000 universe. He serves as the Chapter Master of the Ultramarines.
The most popular vitamin supplements sold by New Chapter are the popular brand known as One Daily Multis. You can see their ads constantly running on tv.
space mountain
Space Mountain
Space mountain
Space Mountain
space hoppers
Space Jam
Dogs are most popular, but in Japan since there is such little space in houses and apartments they would most likely use that space for themselves. So out of the tiny population who has pets it's dogs.
i think it is laika which is sent to space.