Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Photosphere |
The visible part of the sun. |
|
|
Corona |
The outermost layer of the sun's atmosphere. |
|
|
solar flares |
Tremendous bursts of energy caused by magnetic stress within the sun. |
|
|
Granules |
"Bubbles" that cover the surface of the photosphere. |
|
|
a light-year |
The distance light travels in one year. |
|
|
stellar parallax |
the angle that astronomers use to determine the distance to a star. |
|
|
sunspots |
dark patches on the sun caused by the sun's magnetic field. |
|
|
apparent magnitude |
brightness of a star as it appears to an observer on the earth. |
|
|
supergranules |
larger-than-normal convection cells that cover the sun's surface and last from 12 to 24 hours. |
|
|
transition region |
thin layer of the sun's atmosphere that releases ultraviolet radiation. |
