moth: Comet and solar corona, photographed by SOHO, April 2004.
Comet Bradfield (C/2004 F4) at and just after perihelion. This animation uses 23 images taken 17th-19th April, about one every two hours. At its closest, the comet was about 25 million km from the sun (16% of the Earth-Sun distance).
C/2004 F4 was discovered by William Bradfield, amateur astronomer and prolific comet hunter: The most prolific comet hunter of all was Jean-Louis Pons (1761-1831) with 37; the second William Robert Brooks (1844-1921) with 26; Bradfield has discovered 18.
The most prolific comet detecting instrument, incidentally, is SOHO, with more than 2,500 discoveries.