The following outline is provided as an overview of and topical guide to outer space:

Outer space –

What type of thing is outer space?

Outer space can be described as all of the following:

Types of space out there

Fields that study outer space

History of outer space

• Horror vacui (physics)
• Aether (classical element)
• Luminiferous aether
• Big Bang

General outer space concepts

Outer space organizations

Outer space publications

Persons involved with outer space