Our solar system is located in the milky way galaxy, which is about 100,000 light years across. and apart of the Local group of galaxies.
We are in a smaller group of galaxies called the Local Group.
Which is located in the Virgo supercluster of galaxies.
Our solar system is on the outer edge of the milky way. We are located in the Orion arm of the milky way.
The Virgo supercluster is around 110 million light years across.
Really? That's pretty big! Let's head to the space station before we look at stars!
Hey Alex this is our last stop of the tour!
It sure is! Now, let's go look at the stars, my favourite part of space!
The lifecycle of a star varies on its size, so lets look at how stars form first. Stars form from clouds of gasses and dust, called nebulas. The gas within a nebula is most commonly hydrogen which is the lightest element and will eventually form a photostar.
Stars need hydrogen, gravity and time to form.
wow, that's facinating
Eventually, the protostars heat up and nuclear fusion occurs. The nuclear fusion causes the existing hydrogen to turn into helium and light and heat are released.
The larger a star is, the shorter its lifespan will be.
Small stars can have up to eight times the mass of the sun and big stars will have more than eight times the mass of the sun.
When helium fuses in a star, more energy is is released and the outer layers expand.