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| aureole |
an encircling region of light, esp. in artistic representations of a god or holy figure, or around an astronomical object such as the moon; halo; corona. |
| Boötes |
a spring constellation in the northern sky, located between Corona Borealis and Virgo and containing the bright, orange star Arcturus; Herdsman. |
| chromosphere |
a layer of gas, mostly hydrogen, that surrounds a star, esp. the sun, above the photosphere and below the corona. |
| coronagraph |
telescopic equipment that blocks light from a star so that the star's corona and objects close to the star can be resolved. |
| coronavirus |
a type of virus that causes a variety of diseases in humans and other animals ranging from the common cold to potentially fatal illnesses. A coronavirus is an RNA virus of the family Coronaviridae and is so-named because the outer perimeter of each round virus particle resemble a spiky crown similar in shape to the sun's corona. [1/2 definitions] |
| Covid-19 |
a serious, potentially fatal disease caused by a novel coronavirus that broke out initially in 2019 and caused a pandemic in 2020. "Co" in Covid stands for "corona," "vi" stands for "virus," and "d" stands for "disease." The number 19 refers to the year 2019. |
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