Editing Astronomical radio source (section)

===The Sun===
As the nearest star, the [[Sun]] is the brightest radiation source in most frequencies, down to the radio spectrum at 300&nbsp;MHz (1 m wavelength). When the Sun is quiet, the [[Cosmic background radiation|galactic background noise]] dominates at longer wavelengths. During [[geomagnetic storm]]s, the Sun will dominate even at these low frequencies.<ref>{{cite book|author=Michael Stix|title=The sun: an introduction|url=https://books.google.com/books?id=wxHN9jP-mNMC|year=2004|publisher=Springer|isbn=978-3-540-20741-2|access-date=2016-09-23|archive-date=2021-04-26|archive-url=https://web.archive.org/web/20210426225220/https://books.google.com/books?id=wxHN9jP-mNMC|url-status=live}} section 1.5.4 The Radio Spectrum</ref>