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foreign

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to scientific theory a star begins to

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form when a cloud or diffuse gases small

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rocky and organic particles and even ice

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begins to coalesce the gas and dust

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condense down into a tiny ball

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attracting more and more material

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becoming larger and larger and denser

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and denser

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[Music]

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awesome dust circles around the growing

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star much of the material will get

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pulled into the star making the ball

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even larger at a certain point the star

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ignites giving off light and heat

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oftentimes the material left in the disc

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around the star will coalesce into

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planets these planets such as our own

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Earth orbit their star just as Earth

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stars and star systems form all around

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us in our galaxy and in other galaxies

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throughout space

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the process of new star system formation

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has been observed in our own Cosmic

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backyard within the constellation Orion

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this image taken by the Hubble Space

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Telescope shows several newly forming

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star systems within the Orion Nebula an

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active star-forming region

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the material that goes into forming a

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planet around a star determines what

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kind of planet it will be Rocky like

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Earth or gaseous like Jupiter

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any life on a planet like we humans here

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on Earth is made up of this same

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material we are indeed made of Stardust

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throughout the Universe stars form

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mature and then die

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in so doing the star recycles the

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materials created within it back into

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space

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when very large stars come to the end of

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their life they do not go quietly such a

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dying star blasts off its outer layer in

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an energetic explosion casting material

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out into the surrounding space

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this event is called a supernova

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in 1999 a NASA telescope orbiting Earth

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was able to take a picture of a

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supernova located in the constellation

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Cassiopeia

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the Cass a supernova Remnant as it is

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called is one of the most intensely

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studied objects in observable space

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the elements that are cast out into

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space during a supernova event oxygen

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carbon and nitrogen to name a few are

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elements that are necessary for Life as

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We Know It

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the only place these elements are made

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is within the fiery core of a star

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if all living things return to the Earth