Editing Ammonia (section)

==== Infrared detections ====
Absorption at 2.97 micrometres due to solid ammonia was recorded from interstellar grains in the [[Becklin–Neugebauer Object]] and probably in NGC 2264-IR as well. This detection helped explain the physical shape of previously poorly understood and related ice absorption lines.<ref>{{cite journal|author1=Knacke, R. F. |author2=McCorkle, S. |author3=Puetter, R. C. |author4=Erickson, E. F. |author5=Kraetschmer, W. |year=1982|journal= Astrophysical Journal|volume= 260|page= 141|bibcode=1982ApJ...260..141K|doi=10.1086/160241|title=Observation of interstellar ammonia ice|doi-access=free}}</ref>

A spectrum of the disk of Jupiter was obtained from the [[Kuiper Airborne Observatory]], covering the 100 to 300&nbsp;cm<sup>−1</sup> spectral range. Analysis of the spectrum provides information on global mean properties of ammonia gas and an ammonia ice haze.<ref>{{cite journal|author1=Orton, G. S. |author2=Aumann, H. H. |author3=Martonchik, J. V. |author4=Appleby, J. F. |year=1982|journal= Icarus|volume= 52|issue=1|page= 81 |bibcode=1982Icar...52...81O|doi=10.1016/0019-1035(82)90170-1|title=Airborne spectroscopy of Jupiter in the 100- to 300-cm<sup>−1</sup> region: Global properties of ammonia gas and ice haze}}</ref>

A total of 149 dark cloud positions were surveyed for evidence of 'dense cores' by using the (J,K) = (1,1) rotating inversion line of NH<sub>3</sub>. In general, the cores are not spherically shaped, with aspect ratios ranging from 1.1 to 4.4. It is also found that cores with stars have broader lines than cores without stars.<ref>{{cite journal|author=Benson, P. J. |author2=Myers, P. |year=1989|journal= Astrophysical Journal Supplement Series|volume= 71|page= 89 |bibcode=1989ApJS...71...89B|doi=10.1086/191365|title=A survey for dense cores in dark clouds|doi-access=free}}</ref>

Ammonia has been detected in the [[Draco (constellation)|Draco Nebula]] and in one or possibly two molecular clouds, which are associated with the high-latitude galactic [[infrared cirrus]]. The finding is significant because they may represent the birthplaces for the Population I metallicity B-type stars in the galactic halo that could have been borne in the galactic disk.<ref>{{cite journal|author1=Mebold, U. |author2=Heithausen, A. |author3=Reif, K.|year= 1987|journal= Astronomy and Astrophysics|volume= 180|page= 213|bibcode=1987A&A...180..213M|title=Ammonia in the galactic halo and the infrared cirrus }}</ref>