by Marco Rubio
what is a comet ?
Lots of scientist think that a comet is a huge chunk of ice that is floating up in space and when it starts getting closer to the sun and earth it starts melting and makes up a comet .They are left over from the formation of stars and planets billions of years ago.As that ball of ice gets close enough to the Sun, its heat begins to melt some of the ice that makes up the comet.
Sometimes scientists think that a certain comet will be really bright, but Sometimes they think that a certain comet will be really dim, but may turn out to bright.Comets also are usually very colorful; including such colors as silver, blue, purple and gold and red
how fast do comets go?
the fastest a comet can travel is up to speeds of 20,000 miles per hour.
Amazing Comet ISON