Think of the oldest things on Earth: the Pyramids, dinosaur bones, the Grand Canyon. Pretty old, right? Well, maybe compared to our own lives, but compared to the oldest things we've seen through a space telescope, they're basically brand-new.
Space exploration is a broad topic covering many facets of deep-space and planetary science. Learn about space probes, Mars Rovers, SETI and other out-of-this-world subjects.