What are actually stars? People usually define stars as bright "star-shaped" objects which twinkle in the night sky due to the distortion of their light by Earth’s atmosphere. However, they are much more than that. They are fiery balls of gases which produce light through nuclear fusion (combining hydrogen with helium).
The bright blue-white main sequence star Vega (26 light-years away) in the constellation of Lyra and its spectrum as seen through a 8-inch Schmidtt Cassegrain with spectroscope
These are the topics that we will cover in this section:
Stages of the life-cycles of stars; we will look at the life processes and characteristics of stars' life cycles.
Here, we will look at how other aspects of stars, including how scientists measure stars' characteristics.