how to understand all multiverses in marvel universe?

Question

I am new to Marvel Comics.

I know there is a universe in which Yggdrasill connects 9 Realms. So is that it? Are there only 9 Realms in this universe? Or is Yggdrasill just a portion of this universe ?

Is there any link where I can see all the other multiverses if they exist?

Answer 1

A Realm isn't quite the same as a universe. One universe has 9 Realms and many more dimensions.

Realms

In Marvel terms, the 616 universe (which is where the main stories were set, before the current Secret Wars storyline) has 9 Realms:

• Alfheim - home of the light elves
• Nidavellir - home of the dwarves
• Jotunheim - home of the giants
• Svatalfheim - home of the dark elves
• Hel - the realm of the dead
• Muspelheim - home of the demons
• Vanaheim - home of the Vanir
• Midgard - where the humans live.
• Asgard - home of Thor etc..

Our realm is Midgard. This is pretty much the Norse mythology view of things. Illustrated here in an old Thor comic:

However, during Original Sin, a tenth was added:

• Heven - home of the Angels.

Here's a map from Thor v4 #7, with Ygdrassil in:

Other Dimensions

On top of that you have other dimensions such as Limbo (e.g. Magik of the X-Men) and other demon specific realms (from Doctor Strange stories). See wikipedia for a list. Highlights include:

• Limbo - Home of Belasco, featured in the X-Men books and linked to Magik
• The Mojoverse - home of the X-Men villain Mojo
• The Microverse - where Ant Man shrinks to
• The Negative Zone - featured prominently in Fantastic Four books

(The "realms" of the Thor books are basically interconnected dimensions)

As to how many universes in the multiverse - see How many Marvel Earths (Universes) are there?.