history
When was the declaration of independence signed
1776
how many dwarf planets are in our solar system
5
in what year was the battle of Gettysburg
1863
how cold is Neptune (in Celsius)
-200*C
who was our 35th president
John F. Kennedy
When will the Halleys comet orbit past earth again
2061
how many major wars has the US fought in
5
how much does a full NASA space suit cost
$12,000,000
when did the meteor that killed the dinosaurs hit earth
66 million years ago
how old is space
13.8 billion years