We know that intergalactic travel is possible in the Animorphs universe. As Ax says:

> A massive force of human-Controllers will enable [the Yeerks] to
> effectively **push out into other galaxies.**

><sup>#52 The Sacrifice, page 4. Emphasis mine.</sup>

Regardless of this, though, I had always assumed that most species from Animorphs were from the Milky Way. Until I read of the Ellimist's first visit to the Andalite homeworld:

> I flew for a long time, longer than I had ever stayed in Zero-space
> before. I emerged finally at a far edge of the galaxy, **billions of
> light-years from the populated core** of old systems and old planets.
>
><sup>The Ellimist Chronicles, p. 84. Emphasis mine.</sup>

So the Galaxy the Andalites are from is *billions* of light-years wide.

If this is correct, the Andalites cannot be from the Milky Way. The Milky Way is (at the highest current estimates) [160.000 light-years][1] in diameter. Thus, the Andalites' galaxy is hundreds of times larger than the Milky Way. It is also larger than any galaxy presently known to humans (out of universe.)

But I always thought The Andalites were from the Milky Way. Here are some possibilities:

 1. The Andalites are from another galaxy.
 2. Applegate didn't know about the size of the Milky Way, and made a mistake.
 3. The Milky Way is larger in the Animorphs universe than what (real-world) scientists believe it is.
 <hr>

<sup>Regarding #2, Applegate has stated:</sup>

> <sup>Hah! This is one of my favorite things when someone asks about the
> science. Because here's what you need to bear in mind: between us we
> have one BA in English and one GED. When it comes to science we are
> dumb and dumber.</sup>
<hr>

Are the Andalites from the Milky Way?

  [1]: http://www.space.com/29270-milky-way-size-larger-than-thought.html