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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 ...
Lunar space elevator – or lunar spacelift, is a proposed transportation system for moving a mechanical climbing vehicle up and down a ribbon-shaped tethered cable that is set between the surface of the Moon "at the bottom" and a docking port suspended tens of thousands of kilometers above in space at the top.
Publication – magazines, scientific journals, and similar astronomy-related publications; Software – software excluding catalogued data (which is categorized as "catalog") and scientific images; Spacecraft – any spacecraft except space telescopes
The branch of astronomy that deals with the physics of the Universe, especially with the compositional nature of celestial bodies rather than their positions or motions in space. attenuation coefficient The measure of how much the incident energy beam (e.g. ultrasound or x-rays) is weakened by the material it is passing through. [19] atom
List of topics in space; topics as related to outer space. Accidents in space; Animals in space; Architecture in space; Batteries in space; Christmas in space;
Space-based economy – Economic activity in space; Commercial use of space – Economic activities related to space Space manufacturing – Production of manufactured goods in an environment outside a planetary atmosphere; Space tourism – Human space travel for recreation; Space warfare – Combat that takes place in outer space
Taylor Swift and Joe Alwyn arrive at Zuma on October 6, 2019 in New York City. Jackson Lee/GC Images
Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...