For my first puzzle here, something short and simple. Well, short.

My first is a space.

My second leads to a space.

My whole is in space.

What am I?

Hint 1:

The answer is a single word.

Hint 2:

Hint 3:

The first is something you can(not) see, the second is something you can(not) hold, and the whole is somewhere you can(not) go.

• Is it a single word or multiple words? Commented Jun 3, 2016 at 2:15
• I have added two hints. Commented Jun 6, 2016 at 1:53

Is it:

a pace?

Reasoning:

The first thing in a pace is a single step, which is a 'space'. The second step leads to yet another space. The whole of 'pace' is located in the word 'space'.

• Not bad, but not right. I do like the wordplay in your explanation for the third line. Commented Jun 6, 2016 at 1:53

Is it...

a black hole?

My first is a space.

My second leads to a space.

When things fall out of a hole, the container becomes empty.

My whole is in space.

Black holes are certainly in space!

• Yeah, if that was my intended answer I would have worded the first line differently. But thanks for the attempt! Commented Jun 6, 2016 at 1:54

I am

a Klein bottle. My outsides are in. My hole is in space. My insides are out.

I'm not sure if I'm coming or going... but I'm a real physical object in 3D space.

• nice piccy - where did you get it?
– JMP
Commented Jun 3, 2016 at 5:34
• Not the right answer, but I am a fan of Klein bottles. This particular riddle is more about wordplay than mathplay. Commented Jun 6, 2016 at 1:55

Is it:

A Stargate? It is a space, and leads to another space, and generally speaking, anything that exists, exists in space. It is one word, and fictional.

Also consider:

Elysium? Fictional, one word, is a space, leading to spaces(places) within it, and is in space.

Or even better:

Bifröst. A bridge, too is a space, right?

• Your first guess is closer than any other guess so far. Commented Jun 9, 2016 at 5:41