Get the facts: answers to the basic questions about astronomy and Hubble, figures and charts, and dictionary definitions for astronomical terms.
FREQUENTLY ASKED QUESTIONS Frequently Asked Questions You asked; we answered. Check our FAQs for quick, concise explanations concerning astronomy, the Hubble Space Telescope, or HubbleSite.
CALCULATORS AND CHARTS Calculators and Charts Convert Fahrenheit to Celsius, or parsecs to light years. Our conversion calculators translate figures for temperature, speed, distance, weight and redshift. Charts provide at-a-glance reference information for Hubble discoveries.
GLOSSARY Frequently Asked Questions What is dark matter? How long is a light-year? Have you ridden a galactic plane? Can you fill in a coronal hole? Look up these and other astronomical terms.
         
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