1. THE LIFE-CYCLE OF A STAR
BY EMILY GOODE YEAR 6

2. The life-cycle of a star

3. What is a nebula ?
A nebula is a cloud of interstellar dust, hydrogen and helium gas, and plasma. I think it looks like a portal to another dimension What does it look like to you?

4. Red giant phase
This happens to a star when it starts to run out of hydrogen. It starts to cool and expands at the same time. The centre shrinks and the atmosphere swells. It looks a bit like a ball of fire.

5. Planetary Nebula
Planetary Nebula are the outer layers of a star that are lost when the star changes from a red giant to a white dwarf. It’s a bit like when a snake sheds it’s skin and reveals a new body.

6. White Dwarf
A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only the hot core of the star remains.  

7. White Dwarf
This hot core is the new white dwarf, which typically has a temperature exceeding 100,000 Kelvin.  The sun only has a temperature of 5,778 Kelvin.  Which makes a young white dwarf over 17 times hotter than the sun. The white dwarf cools down over the next billion years or so unless it is accreting matter from a nearby star.  When a white dwarf is finished cooling down it will still be 10,000 Kelvin, which is still 4,222 Kelvin more than the Sun's temperature. 

8. QIUIZ TIME

9. Put these stages of a star in their correct order
Red Giant
Stellar Nebula
Planetary Nebula
Average Star
White Dwarf

10. Crossword Which one of the stages is first?
Which stage has a temperature of 100,000 kelvin?
Which stage is like a snake shedding it’s skin?
Which stage looks like a song name?
What constellation has a belt?
What is our nearest star?

11. Answers
1. nebula
White dwarf
Planetary nebula
Red giant
Orion
Sun