• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

What Is The Life Cycle of a Star?

Extracts from this document...


TRIPLE SCIENCE                                                     Biology                                                                 Ms. Xuereb

Paulos Zerezghi 9AM

What Is The Life Cycle of a Star?        

Stars are an astounding factor of our universe. To many, they are known to be ‘the lights of the universe’. They are much bigger than that. They even are born, they live and then they die. Stars are hot bodies of glowing gas that start their life in a big cloud of gas and dust known as aNebula. This is the birthplace of stars as the gas and dust is what makes up a star. Our sun, in fact was born in a nebula 5 billion years ago.Stars differ in mass, size and temperature, widths ranging from 450x smaller to over 1000x larger than that of the Sun.

Space (where stars are) may seem empty, but actually it is filled with clouds of gas and dust. This gas and dust is known to be called interstellar medium. The gas atoms are mostly hydrogen (H2) and are not very spaced apart. The dust is mostly carbon and silicon. The stars that are blue have more heat are normally more scorching than the red stars which are less cool. The life span of a typical star covers millions of years that can even reach tens of billions of years.

...read more.



This is a large bright star with a cool surface. It is formed during the later stages of the evolution of a star, as it runs out of hydrogen fuel at its centre. Red giants have diameters between 10 and 100 times that of the Sun. They are very bright because they are so large, although their surface temperature is lower than that of the Sun, about 2000-3000
Very large stars (red giants) are often called Super Giants. These stars have diameters up to 1000 times that of the Sun.


These are very cool, dim and small stars, roughly one tenth the mass and diameter of the Sun. They burn very slowly and have estimated lifetimes of 100 billion years. Barnard's Star is a red dwarf.


This is very small, hot star, the last stage in the life cycle of a star like the Sun. White dwarfs have a mass alike to the Sun’s, but only 1% of the Sun's diameter; totalling to a white dwarf roughly the diameter of the Earth’s. The surface temperature of a white dwarf is 8000
oC or more.

White dwarfs are the shrunken leftovers of normal stars, whose nuclear energy have been used up.

...read more.


mall Star: After a small e.g. our Sun has become a red giant its outer layer drifts away into space. The hot dense core that remains is called a white dwarf. The white dwarf cools and eventually stops shining.

Massive Star: After a massive star has become a red giant, nuclear reactions in the helium core continue and form other elements around an iron core. The collapse of this core causes an explosion called a supernova. The remains of the core form a tiny, very dense neutron star.

Really Massive Star: These stars are similar to massive stars. From the red giant stage nuclear reactions create an iron core which explodes as a supernova and forms a neutron star. The difference for really massive stars is that the core of the neutron star collapses further and this results in a black hole.



...read more.

This student written piece of work is one of many that can be found in our GCSE The Earth and Beyond section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE The Earth and Beyond essays

  1. Peer reviewed

    The Life Cycle of the Stars

    4 star(s)

    Einstein's theory of relativity, E-mc squared, has proven this. The makeup and chemical composition is very closely the same from star to star. There are differences in a star's mass, and through what phase of their life they are passing.

  2. Mars - The red planet

    message would take 35 - 40 minutes to reach Earth, even while traveling at the speed of light. There would be two Viking spacecraft, so that if one failed, the other one could complete the job. The two Viking spacecraft comprised to parts - an orbiter and a lander.

  1. Should We Persue Manned Space Flights?

    joint, P is the pressure in the suit, and W is the resultant work. Because pressure is dictated by life support requirements, the only means of reducing work is to minimize the change in volume.All space suit designs try to minimize or eliminate this problem.

  2. When one begins to study satellites he or she is bound to find out ...

    The rockets help keep the satellite on its course without the possibility of it losing altitude or falling right out of the orbit in which it was in. A satellite's position has much to do with the time. For example, a satellite located 22,300 miles above the Earth's surface which

  1. Sustaining life on Mars - the survival of the human race.

    This method can be as good, if not better than the mirror melting method because the heating stations could be powered by energy created by nuclear fusion. The amount of energy given off by fusion is massive and is extremely hot.

  2. The life cycle of a star.

    They can become close enough together for the strong nuclear force to take effect, so that they merge. Fusion takes place, with hydrogen as the principal key material. This begins the process of conversion of mass to energy, and much of the released energy takes the form of photons which begins to stream from the new star.

  1. In the beginning God created the Heavens and the Earth.

    He did not just say that on the first day light and darkness was created, on the second something else. He very specifically mentions that the day was opened in the morning, and closed in the evening, and he mentions it for every day of creation.

  2. GCSE Astronomy Revision Notes

    There are more craters because the far side of the Moon is not shielded from debris. 1. What is the Latin name for seas on the Moon? * Maria 1. What is Latin name for the highlands of the Moon?

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work