who has seen the first neutrino in space?

Answer 1

Neutrinos are very difficult to detect. You cannot see them, but there interaction with other matter can be detected. See later portion of answer, one detector required 520 short tons of chlorine as it's medium.

The first observed (detected) Neutrino on earth was 1951
http://www.ps.uci.edu/physics/news/nuexpt.html

Chlorine detectors consist of a tank filled with a chlorine containing fluid such as Tetrachloroethylene. A neutrino converts a chlorine atom into one of argon via the charged current interaction. The fluid is periodically purged with helium gas which would remove the argon. The helium is then cooled to separate out the argon. A chlorine detector in the former Homestake Mine near Lead, South Dakota, containing 520 short tons (470 metric tons) of fluid, made the first measurement of the deficit of electron neutrinos from the sun (see solar neutrino problem). A similar detector design uses a gallium → germanium transformation which is sensitive to lower energy neutrinos. This latter method is nicknamed the "Alsace-Lorraine" technique because of the reaction sequence (gallium-germanium-gallium) involved. These chemical detection methods are useful only for counting neutrinos; no neutrino direction or energy information is available.
source http://en.wikipedia.org/wiki/Neutrino#Neutrino_experiments.2C_neutrino_detectors

Answer 2

i did.. he was wearing a gold lame suit like elvis and he sung hound dog it was great!

then he darted off and i heard this diembodied voice going "first neutrino has left the galaxy"

Answer 3

There are a few billion going through you each second coming from the sun. I don't think anyone has ever detected one in space.