Must... pick... fiiivvveee!!!
But I got 10 
What a selection of top notch images. Hafta agree that some didn't really fit the bill but it was still difficult to chose 5.
Glad we had just done a study on 'space' in my design class (even if I didn't have time to enter a shot). Congrats to every one on their entries. You've done a magnificant job!