The following are terms from A-Z related to space & astronomy: -A-Absolute magnitude – also known as absolute visual magnitude, relates to measuring a heavenly object’s brightness when viewed from 10 parsec or 32+ light years. That's twilight.

planet definition: 1. an extremely large, round mass of rock and metal, such as Earth, or of gas, such as Jupiter…. Pin It.

This happens alongside radiometric correction and … Photo: W+G Creative . Habitable zone: The range of orbital distance from a star at which temperatures would allow liquid water to exist on the surface of a planet with sufficient atmosphere. Glossary Sometimes the terms used to describe the planets beyond our solar system need more explanation. All Planet scenes are flat-field corrected, which undoes the effects of vignetting, as well as normalized for sun angle and camera settings. This glossary of astronomy is a list of definitions of terms and concepts relevant to astronomy and cosmology, their sub-disciplines, and related fields.Astronomy is concerned with the study of celestial objects and phenomena that originate outside the atmosphere of Earth.The field of astronomy features an extensive vocabulary and a significant amount of jargon. The bending of light rays due to atmosphere, so called horizontal refraction (= 35' 8") is included. The exact definition of what constituted a planet varied among cultures. They occurred in a great variety of different compositions, masses, and surface conditions.

Dwarf planet: Objects that are round and orbit the sun, just like planets do. The planets’ energies are said to mingle, and some believe this affects our experience down here on earth. They occurred in a great variety of different compositions, masses, and surface conditions. Active Galactic Nuclei (AGN) A very bright, compact region found at the center of certain galaxies. A Planet is the common designation for a certain type of celestial body usually orbiting a star. Learn more. See a glossary of definitions for terms and abbreviations relating to the Hubble Space Telescope that can be found in content throughout HubbleSite.org. A Planet is the common designation for a certain type of celestial body usually orbiting a star. They can be caused by an explosion or the impact of a meteorite. (The real-life manifestation of “stars aligning,” basically.) They occurred in a great variety of different compositions, masses, and surface conditions. A planet orbiting a star other than our Sun; also called “extrasolar planet”. Space Terms. A full list of Planets can be found here. synchronous orbit radius The orbital radius at which the satellite's orbital period is equal to the rotational period of the planet. Asteroids can vary in size from a few feet across to hundreds of miles. Kids learn about the glossary and terms for the science of astronomy including words and definitions such as asteroid, comet, meteoroid, galaxy, eclipse, etc.

Take an interactive tour of the solar system, or browse the site to find fascinating information, facts, and data about our planets, the