Editing Jansky (section)

== Orders of magnitude ==

{| class="wikitable"
|-
! Value (Jy)
! Source
|-
|align="right"| {{val|110000000}}
| [[Radio-frequency interference]] from a [[GSM]] telephone transmitting 0.5&nbsp;W at {{val|1.8|u=GHz|fmt=gaps}} at a distance of 1&nbsp;km ([[RSSI]] of −70&nbsp;[[dBm]])<ref>{{cite web|url=http://www.iucaf.org/SSS2010/presentations/day2/Clegg(Units).ppt |title=Data |publisher=iucaf.org |access-date=2019-11-14}}</ref>
|-
|align="right"| {{val|20000000}}
| [[Sunspots|Disturbed Sun]] at 20&nbsp;MHz ([[Karl Guthe Jansky]]'s initial discovery, published in 1933)
|-
|align="right"| {{val|4000000}}
| Sun at 10&nbsp;GHz
|-
|align="right"| {{val|1600000}}
| Sun at [[Hydrogen line|1.4&nbsp;GHz]]
|-
|align="right"| {{val|1000000}}
| [[Milky Way]] at 20&nbsp;MHz
|-
|align="right"| {{val|10000}}
| 1 [[solar flux unit]]
|-
|align="right"| {{val|2000|fmt=gaps}}
| [[Milky Way]] at 10&nbsp;GHz
|-
|align="right"| {{val|1000|fmt=gaps}}
| [[Sunspots|Quiet Sun]] at 20&nbsp;MHz
|}

Note: Unless noted, all values are as seen from the Earth's surface.<ref>{{cite book | first=John Daniel | last=Kraus | title=Radio Astronomy | year=1986 | publisher=Cygnus-Quasar Books | isbn=1882484002 | at=Table: Radio spectrum of astronomical sources | url=http://astro.u-strasbg.fr/~koppen/10GHz/basics.html | access-date=2013-08-24 | archive-url=https://web.archive.org/web/20130516042600/http://astro.u-strasbg.fr/~koppen/10GHz/basics.html | archive-date=2013-05-16 | url-status=dead }}</ref>