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Facts about Stars

About Facts about Stars

What is a star?

Stars are giant spheres of superhot gas made up mostly of hydrogen and helium. Stars get so hot by burning hydrogen into helium in a process called nuclear fusion. This is what makes them so hot and bright. Our Sun is a star.

Teacher Review

Lifecycle of a star

  • Birth - Stars start out in giant clouds of dust called nebulae. Gravity forces the dust to bunch together. As more and more dust bunches up, gravity gets stronger and it starts to get hot and becomes a protostar. Once the center gets hot enough, nuclear fusion will begin and a young star is born.
  • Main Sequence Star - Once a star, it will continue to burn energy and glow for billions of years. This is the state of the star for the majority of its life and is called the "main sequence". During this time a balance is met between gravity wanting to shrink the star and heat wanting to make it grow bigger. The star will remain this way until it runs out of hydrogen.
  • Red Giant - When the hydrogen runs out, the outside of the star expands and it becomes a red giant.
  • Collapse - Eventually the core of the star will start to make iron. This will cause the star to collapse. What happens to the star next depends on how much mass it had (how big it was). The average star will become a white dwarf star. Larger stars will create a huge nuclear explosion called a supernova. After the supernova it may become a black hole or a neutron star.

Types of Stars

There are many different types of stars. Stars that are in their main sequence (normal stars) are categorized by their color. The smallest stars are red and don't give off much of a glow. Medium size stars are yellow, like the Sun. The largest stars are blue and are hugely bright. The larger the main sequence star, the hotter and brighter they are.

Dwarfs - Smaller stars are called dwarf stars. Red and yellow stars are generally called dwarfs. A brown dwarf is one that never quite got large enough for nuclear fusion to occur. A white dwarf is the remnants of the collapse of a red giant star.

Giants - Giant stars may be main sequence stars like a blue giant, or stars that are expanding like red giants. Some supergiant stars are as big as the entire Solar System!

Neutrons - A neutron star is created from the collapse of a giant star. It's very tiny, but very dense.

Fun facts about Stars

  • Most of the stars in the universe are red dwarfs.
  • They twinkle because of movement in the Earth's atmosphere.
  • Many stars come in pairs called binary stars. There are some groupings with up to 4 stars.
  • The smaller they are the longer they live. Giant stars are bright, but tend to burn out fast.
  • The nearest star to Earth is Proxima Centauri. It is 4.2 light-years away, meaning you would have to travel at the speed of light for 4.2 years to get there.
  • The Sun is around 4.5 billion years old.
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This is a little app I developed for my daughters and they love it!

Kids Stars is a mobile behaviour/reward chart for children.

With Kids Stars reward your children when you are out and about, rather than waiting until the child gets home. Studies show that better progress is made when children are rewarded immediately after their actions.

Reward your children for good behavior with "Stars". Each kid gets to press a big chunky star each time they behave well; pressing the star produces a round of applause.

For each star won, the child then chooses one present on a grid of nine, the selected present is removed, revealing part of a picture hidden behind.

A statistics menu enables the parents to view their child’s statistics over time, this can be shown as a list or as a graph as well as a Calendar.
For each day of the calendar, you can also specify your kids mood and leave a comment. Handy to keep a trace of your children behavior over the last days and months.

It is also perfect for nursery and creches as it can support as many kids as you like and all stars can be published on your Facebook page for the parents to follow!

Keywords: behavior chart, positive reinforcement, chart preschooler, toddler, rewards, calendar.

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