Learn Everything About Astronomy & Astronauts Check out our free astronomy glossaries or check out our blog on astronauts and space. Check Our Free Glossaries! Astronomy & Space Science Glossaries Astrobiology Glossary Astrochemistry Glossary Astronomical History & Mythology Glossary Astronomical Objects Glossary Astronomical Phenomena Glossary Astronomical Units & Measurements Glossary Astrophysics Glossary Cosmology Glossary Planetary Science Glossary Rocketry & Propulsion Glossary Space Exploration Glossary Space Weather Glossary Telescopes & Observatories Glossary Recent Blog Posts Can Astronauts Play Table Tennis Astronaut Plays Liquid Ping Pong in Space 5 Critical Skills Relevant to Astronaut The Most Famous Astronauts of All Time What Does Fire Look Like in Space? What Happens if an Astronaut Dies in Space? What Is the Most Dangerous Thing in Space? What Gases Are in Space? What Would Happen if a Nuke Went off in Space? Why Can't Sound Travel in Space? What Is Below Earth in Space? If the Sun Is in Space Why Is Space Cold? What Is a Probe in Space? What Is a Void in Space? How Do Astronauts Get Oxygen in Space? 123…5 Next