DARK MATTER - WHAT IS IT?

Scientists using different methods to determine the mass of galaxies have found a discrepancy that suggests ninety percent of the universe is matter in a form that cannot be seen. (1). This strange material that dominates the Universe but which is invisible to current telescope technology is one of the great enigmas of modern science. That it exists is one of the few things on which researchers have been certain. What is it, really? How do we know that it's there? How do we ¡°see¡± it if it's ¡°dark¡±?
Some scientists think dark matter is in the form of massive objects, such as black holes, that hang out around galaxies unseen. Other scientists believe dark matter to be subatomic particles that rarely interact with ordinary matter.
In 1933, the astronomer Fritz Zwicky while studying the motions of distant galaxies in the Coma cluster estimated the total mass of a group of galaxies by measuring their brightness. When he used a different method......

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Title: Dark Matter - What Is It?
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1. Dark Matter
   

   Dark Matter. As the name suggests, dark matter is “dark”; that is, not visible to
   the naked eye. ... This means that the composition of dark matter is unknown. ... ...

2. Dark Matter
   

   Dark Matter. There is perhaps no current problem of greater importance
   to astrophysics and cosmology than that of "dark matter". ... ...

3. Dark Matter
   

   Dark Matter. There is perhaps no current problem of greater importance
   to astrophysics and cosmology than that of "dark matter". ... ...

4. Dark Matter - What Is It?
   

   DARK MATTER - WHAT IS IT? DARK MATTER - WHAT IS IT? ... Other scientists believe dark
   matter to be subatomic particles that rarely interact with ordinary matter. ... ...

5. Dark Matter
   

   Dark Matter. Dark Matter Dark Matter Andrew Bilbrey Honors Physical Science Mr.
   Crupi 9/17/97 I'll be the first one to admit it. Dark mater is a boring subject. ... ...