Step 7. Eventually, the young star reaches hydrostatic equilibrium, in which its gravity … Nuclear reactions at the centre (or core) of stars provides enough energy to make them shine brightly for many years. 1 0 obj 1. Birth comes at the beginning, as with all things, and takes place in galactic "nurseries" called nebulae. %��������� 7 0 obj Very large, massive stars burn their fuel much faster than smaller stars and may only last a few hundred thousand years. stream

Science has told us that the universe is finite, with a beginning, middle, and a future. Life Cycle of a Star. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe.The table shows the lifetimes of stars as a function of their masses. Nuclear reactions at the centre (or core) of stars provides enough energy to make them shine brightly for many years. "����D��q�t�\7��eO�D� Over the course of millions of years, these protostarssettle down into … The core is hot enough for the helium to fuse to form carbon. Life Cycle of a Star. Life Cycle of a Star like our Sun… •Our sun is at the Main Sequence stage in its life. %PDF-1.3 3 0 obj The outer layers begin to expand, cool and shine less brightly. The life cycle of a star begins as a large gas cloud. Life Cycle of a Star – Step by Step Explained 1. endobj Towards the end of a star's life, the temperature near the core rises and this causes the size of the star to expand. <>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 6 0 obj . The life cycle of a star Gravity and nuclear fusion reactions drive the formation and development of stars. <> ",#(7),01444'9=82. <> endobj

Step Three (Planetary Nebula) Life Cycle of a High Mass Star Some are 50x that of the Sun. Life Cycle of a Massive Star: Step 1 - Green-A cloud of gas and dust collapses due to gravity, creating a protostar. The lifespan of a star is measured in billions of years. The expanding star is now called a Red Giant. <>>> Step Four (White Dwarf) All that would be left is the carbon core. 4 0 obj The table shows the lifetimes of stars as a function of their masses. The outer layers begin to expand, cool and shine less brightly. Stars, much like humans, grow and change through stages of life.In the following sections, let's examine the different stages in the life cycle of a star. Step 3 - Yellow - …nuclear fusion occurs. )圮狜#k.B%��R]D+���[lVx$�T*"�u�Gq�;Cz�rRղ�I�4�w�,t�%�]�3N�?�����O������d8&I�X����V£�mn����qVb�ܻ��6� �RmYf�hA�)j��.�o�&k�7�n5ͨ�Z�������D)$hv��w�r�j��Q��ĂN �{�O�R��,��B ��"���ۑ�q��rA�J�A�6GMe6M1��DVe��� OG2�X���\g��,)l >�{@�'d��[�Ϧ�s�T�n�xϱ�i�d/B����'%Ȍ���z�(���ۺjV�&i�B�sN���btی�B�l9ՙ�8M�����f�k�800���p�L� ��z�a�12�c6�e6ϼkY�̡A��Ú��{����,��jӴg��-��w렚��X�J��T܄@������#�BG�A p��}*_��݅j./"VH��I�:��F�3j�?�-�:i�V�PEy��me�B[������)�����*�Ռ��J��:��$L�D�!9���h�G>���yWF瓷I�:��]J� ��4֛\"٨��H����F�G� ��� %���� Life Cycle of a Star. Giant Gas Cloud. Step 4 - Red - The star expands into a red giant when the star's hydrogen level drops. The expanding star is now called a Red Giant. Supernovae are one way. Massive Stars - The Life of a Star of about 10 Solar Masses. The exact lifetime of a star depends very much on its size. stream Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe. $.' A star’s life begins… Life Cycle of a Star like our Sun… Nebula Protostar Main Sequence Star Red Giant Planetary Nebula White Dwarf.
<> Step 8 - Green - The material shed during the star's life joins new gas clouds, and new stars are formed.
A cloud of dust and gas, also known as a nebula , becomes a protostar, which goes on to become a main sequence star.