Astronomers made a big discovery in determining Pluto's dwarf planet credentials.
You've heard about comets and asteroids in space. What is the different?
Water is pretty incredible. Oceans cover 70% of the planet and our bodies are something like 60% water. Where did all this water come from?
What is the difference between an asteroid and a comet?
Have astronomers discovered a new planet? Find out on this Moment of Science.