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Many people are unaware that, like humans, stars are born, live their lives and then die. Watch this video to find out and explain to your learners:ĭo you think it is important to teach astronomy to learners at school? Read this interesting and informative article detailing the benefits and applications of astronomy: Īctivity: Observing Orion in the spring skyĪctivity: Flow diagram poster showing the lifecycle of a Sun-like starĪ good way to introduce the topic of stellar evolution is to start by asking learners how long they think stars last. Some learners may ask why stars look 'spiky' in the photographs from telescopes, but in the diagrams shown here, they are presented as spheres.

stars like the Sun end their lives as planetary nebulae and white dwarfs.

stars eventually swell up to form a red giant star.

Stars spend most of their lives on the main sequence fusing hydrogen gas to helium gas

stars are born in vast clouds of gas and dust.

The main aims of this chapter are to ensure that learners understand the following: The Sun's evolution is presented as an example. The exact evolution that a star follows depends on the initial mass of the star. In this chapter the focus is on the life cycle of stars, including how they are born and die. Learners should be familiar with the fact that the Sun is a star and produces heat and light (energy) via nuclear reactions. In Grade 7, they focused on the system which includes the Sun, Earth and Moon.

In Grades 6 and 8 learners covered material regarding the solar system including the Sun.