Methyl acetylene (CH3CCH) was reported by
Buhl and Snyder in the early 1970s.
They reported a single rotational line in Sgr B2 observed with the
36-foot telescope at
Kitt Peak. Subsequent work by
Hollis et al. in 1981 and
Kuiper et al. in 1984
identified sufficient additional lines to confirm the initial detection. Methyl acetylene has
also been observed in the atmospheres of
Uranus, all via IR spectroscopy.
The Jupiter and Saturn detections were made with the
Infrared Space Observatory,
while the 2006 Uranus detection was made with the
Spitzer Space Telescope.
Finally, methyl acetylene has also been observed in the atmosphere of
Methyl acetylene or
propyne is a very
reactive and flammable gas at
standard temperature and pressure.
symmetric top molecule,
it is useful in astronomy as a means of ascertaining