What is the name of the item called the "ghost particle?

Heard the term neutrino on the Big Bang Theory. Learned a lot about science from watching that show.

65k neutrinos moving through us every second! ...boggling.

aussiegrrrl, Multiply that by 1 million . And then to whatever your surface area is when facing the sun in square centimetres . Quite a few . Awesome science , slightly let down by the mundane A quarter of an inch is only just over 6 millimetres so it would be only just over .40 square centimetre , so less than the square centimetre , not more