Eta Carinae

This supergiant star is a highly unpredictable variable. Today, it shines at 5th magnitude, on the limit of naked-eye visibility, but in 1843, it reached magnitude -1, becoming the second brightest star in the sky.

expand or contract. Frequently, a cycle of instability arises, with the star swelling and shrinking periodically. The change in size is accompanied by variations in brightness and in color.

hottest star expands and contracts (exaggerated here)

hottest star expands and contracts (exaggerated here)

LiGHT CURVE Of CEPHEiD VARiABLE

Time

LiGHT CURVE Of CEPHEiD VARiABLE

0 0

Post a comment