coronal hole


coronal hole
Astron.
a part of the solar corona that appears dark on optical and x-ray images and is characterized by low temperature and low density.
[1970-75]

Useful english dictionary. 2012.

Look at other dictionaries:

  • Coronal hole — Coronal holes are areas where the Sun s corona is darker, colder, and has lower density plasma than average. These were found when X ray telescopes in the Skylab mission were flown above the Earth s atmosphere to reveal the structure of the… …   Wikipedia

  • coronal hole — Astron. a part of the solar corona that appears dark on optical and x ray images and is characterized by low temperature and low density. [1970 75] * * * …   Universalium

  • Coronal loop — Typical coronal loops observed by TRACE Coronal loops form the basic structure of the lower corona and transition region of the Sun. These highly structured and elegant loops are a direct consequence of the twisted solar magnetic flux within the… …   Wikipedia

  • Coronal mass ejection — A coronal mass ejection in time lapse imagery obtained with the LASCO instrument. The Sun (center) is obscured by the coronagraph s mask. (September 30 – October 1, 2001) A coronal mass ejection (CME) is a massive burst of solar wind, other light …   Wikipedia

  • Coronal radiative losses — In astronomy and in astrophysics, for radiative losses of the solar corona, it is meant the energy flux irradiated from the external atmosphere of the Sun (traditionally divided into chromosphere, transition region and corona), and, in particular …   Wikipedia

  • Corona — This article is about the astronomical term. For other uses, see Corona (disambiguation). During a total solar eclipse, the solar corona can be seen with the naked eye. A corona is a type of plasma atmosphere of the Sun or other celestial body,… …   Wikipedia

  • sun — sunlike, adj. /sun/, n., v., sunned, sunning. n. 1. (often cap.) the star that is the central body of the solar system, around which the planets revolve and from which they receive light and heat: its mean distance from the earth is about 93… …   Universalium

  • Outline of astronomy — Mauna Kea in Hawaii is one of the world s premier observatory sites. Pictured is the W. M. Keck Observatory, an optical interferometer. The following outline is provided as an overview of and topical guide to astronomy: Astronomy – studies the… …   Wikipedia

  • Nanoflares — A nanoflare is a very small solar flare which happens in the corona, the external atmosphere of the Sun. The hypothesis of microflares as a possible explanation of the coronal heating was first suggested by Gold [1] and then later developed by… …   Wikipedia

  • Sunlight — This article is about light emitted by the Sun. For other uses, see Sunlight (disambiguation). Sunshine redirects here. For other uses, see Sunshine (disambiguation). For natural lighting of interior spaces by admitting sunlight, see Daylighting …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.