BBC3 年
The life cycle of stars - Higher
The life cycle for a particular star depends on its size ... larger nuclei begin to form and the star may expand to become a red giant. When all the nuclear reactions are over, a small star ...
BBC4 年
The life cycle of stars - Higher
The life cycle for a particular star depends on its size ... larger nuclei begin to form and the star may expand to become a red giant. When all the nuclear reactions are over, a small star ...
来自MSN1 个月
This red giant star has starspots larger than the entire sun
Thankfully, our sun's sunspot activity occurs along an approximate 11-year cycle, giving us some indication ... track of starspot activity on a red giant star called XX Trianguli, and the ...