How Rocket Engines Work - Believe it or not, the hardest part of space exploration is getting a spaceship off the ground. Explore the basics of propulsion and learn about both solid-fuel and liquid-fuel rocket engines.
How Black Holes Work - Astronomers announced this week that they have solid evidence of a black hole swallowing up a star. Yep -- swallowing a star. Learn all about these gravitational monsters.
How Comets Work - Comets are mysterious in many different ways. Learn where they come from, why they have tails and why they appear so infrequently!
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One of the most interesting things about space travel is the drama. Human beings place themselves into amazing vehicles and travel into a completely hostile environment that is almost beyond imagination, and then describe their experiences for us... more
