Glossary of Astronomy Terms The universe is a large place full of wondrous and unimaginable things. Astronomy vocabulary, Astronomy word list - a free resource used in over 40,000 schools to enhance vocabulary mastery & written/verbal skills with Latin & Greek roots. Below is a list of definitions and explanations to … Your index finger held at arm’s length spans about 1°, your fist about 10°. The amateur astronomy hobby contains words, labels, and technical terms that may seem be a little confusing for both beginners and the more experienced hobbyists. Astronomy is the science that looks up: at stars, at other planets, at solar systems, at galaxies, and at everything else in the universe. The Lexicon and Glossary of Terms in LEVEL 5 is a compilation and modern updating of astronomical terms culled from the published literature. 21-cm Radiation. Astronomical Glossary - Terms & Definitions. It is designed to cover all of astronomy, including particle physics and some statistics; in this sense the Glossary is a slight departure from the extragalactic focus of the rest of the knowledge base. Thinking Ahead; 21.1 Star Formation; 21.2 The H–R Diagram and the Study of Stellar Evolution; 21.3 Evidence That Planets Form around Other Stars; 21.4 Planets beyond the Solar System: Search and Discovery; 21.5 Exoplanets Everywhere: What We Are Learning; 21.6 New Perspectives on Planet Formation; Key Terms; Summary; For Further Exploration; Collaborative Group Activities Black holes are so dense and have such intense gravity, that nothing—not even light—can escape them. Advanced Dictionary of Astronomical Terms .

Angular Size and Distance The apparent size of an object in the sky, or the distance between two objects, measured as an angle. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z. Astronomical terms can be a little technical and difficult to understand.