BBC4 年
The life cycle of stars - Higher
The life cycle ... star forms from massive clouds of dust and gas in space, also known as a nebula. Nebulae are mostly composed of hydrogen. Gravity begins to pull the dust and gas together. As ...
BBC3 年
The life cycle of stars - Higher
The life cycle ... star forms from massive clouds of dust and gas in space, also known as a nebula. Nebulae are mostly composed of hydrogen. Gravity begins to pull the dust and gas together. As ...