Scientifically, that's great, because there's been lots of discussion of whether comets contain minerals or glass.

We'll be able to say some things almost instantly. One of the big questions is do comets contain minerals that contain water, called hydrated silicates and under an electron microscope you can identify those practically instantly.

Comets do blow up unexpectedly,

This is what we looked like 4.5 billion years ago. Comets haven't changed since then.

We believe materials coming out of comets now is the same material that went into comets 4.5 billion years ago.

What we want to know is how organic molecules actually form in comets and whether they helped deliver organic material to the Earth before life began.