corona virus
- Corona Australis, (Latin: Southern Crown)also called Corona Austrina, constellation in the southern sky, at about 19 hours right ascension and 40 south in declination. The ...
- CigarModern cigars are described by their size and shape as follows: corona is a straight-shaped cigar with rounded top (the end placed in the mouth), ...
- Eclipse research activities from the article EclipseBecause the corona is a million times fainter than the disk of the Sun, it cannot be seen unaided in broad daylight. In 1930 the ...
- Transition Region And Coronal Explorer (United States satellite)TRACE revealed a much more dynamic solar corona than had previously been known. Structures in the corona were seen to change over a period of ...
- Since the discovery of the nature of the corona, such low-density superhot plasmas have been identified throughout the universe: in the atmospheres of other stars, ...
- Coronal Mass Ejection (astronomy)Before the invention of the coronagraph (an instrument that places an occulting disk in front of the Sun to block out its bright light), the ...
- Solar Prominence (astronomy)Solar prominence, dense cloud of incandescent ionized gas projecting from the Suns chromosphere into the corona. Prominences sometimes extend hundreds of thousands of kilometres above ...
- Coronagraph (telescope)Coronagraph, telescope that blocks the light of a star inside the instrument so that objects close to the star can be observed. It was invented ...
- Bernard Ferdinand Lyot (French astronomer)Before Lyots coronagraph, observing the corona had been possible only during a solar eclipse, but this was unsatisfactory because total eclipses occur only rarely and ...
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