All About Space

Life cycle of a star

The mass of a stellar object will determine its evolution

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3 Massive Star

Stars that have accumulate­d mass of at least eight-times that of our Sun will live their lives as a massive star for roughly tens of millions of years.

5 Supernova

When the star becomes unstable it will inevitably explode in a spectacula­r fashion. This will cast its outer layers into the cosmos as a supernova.

6 Black hole

If the star was more than eight-times the mass of the Sun, a black hole is likely to reside after the supernova.

1 Nebula

The start of any star’s life begins as a cloud of gas and dust, before gravity gets hold of it.

4 Red supergiant star When its hydrogen begins to deplete the outer layers of the star will puff out due to an imbalance in the radiation and gravitatio­nal equilibriu­m.

7 Neutron star/pulsar

If the star was between four- and eight-times the mass of the Sun a neutron star will be left over from the supernova.

8 Small star

A relatively small star is around the same mass of the Sun and will have a life span of about 10 billion years.

9 Red giant star

A similar puffing effect will occur to a Sun-like star in which the outer layers will expand by millions of kilometres.

2 Protostar

Sections of the gas and dust begin to clump, and gravity and momentum of spin will begin star formation in the form of a protostar.

10 Planetary nebula

Once the fuel is finally depleted the outer layers will be expelled. Not as extravagan­tly as a supernova, but as a planetary nebula.

11 White dwarf

In the centre of the planetary nebula is a white dwarf, the remains of a star that has used all its hydrogen.

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