Page 40 - COSMOS & H -Health - Science

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WHAT MAKES UP THE UNIVERSE??
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The universe's atoms and light account for less than 5% of itss
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total contents. The rest is made up of dark matter and darkk
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energy, which are invisible but control the structure andd
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evolution of the universe. Dark matter accounts for the majorityy
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of the mass in galaxies and galaxy clusters, and it is responsiblee
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for how galaxies are organised on a large scale..
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WHY IS DARK MATTER CALLEDD
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INVISIBLE GLUE??
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Dark matter isn’t simply dark: it’s invisible. Light of all typess
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seems to pass through as though it’s completely transparent..
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Even though dark matter is invisible it has its mass. Dark matterr
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holds up galaxies and galaxy clusters through gravity. Darkk
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matter, unlike normal matter, does not emit, absorb, or reflectt
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light, rendering it completely opaque to telescopes.
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A N T I - M A T T E R
ANTI-MATTER
T h e r e i s a l s o a n t i m a t t e r , w h i c h d i f f e r s
There is also antimatter, which differs
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f from dark matter. Antimatter is made up
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of particles that are virtually identical to
o f p a r t i c l e s t h a t a r e v i r t u a l l y i d e n t i c a l t o
visible matter particles but have opposing
v i s i b l e m a t t e r p a r t i c l e s b u t h a v e o p p o s i n g
electrical charges. These particles are
e l e c t r i c a l c h a r g e s . T h e s e p a r t i c l e s a r e
known as antiprotons and positrons (or
k n o w n a s a n t i p r o t o n s a n d p o s i t r o n s ( o r
a n t i e l e c t r o n s ) . W h e n a n t i p a r t i c l e s a n d
antielectrons). When antiparticles and
particles collide, an explosion occurs and
p a r t i c l e s c o l l i d e , a n e x p l o s i o n o c c u r s a n d
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o u t . B e c a u s e w e l i v e i n m a t t e r - b a s e d
out. Because we live in matter-based
u n i v e r s e , i t i s e v i d e n t t h a t t h e r e i s n o t
universe, it is evident that there is not
A N T I M A T T E R A S P O R T R A Y E D B Y I M A G E S
ANTIMATTER AS PORTRAYED BY IMAGES
m u c h a n t i m a t t e r a r o u n d ; o t h e r w i s e ,
much antimatter around; otherwise,
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-Safi
-IX-D