Herschel’s image of Fomalhaut April 18, 2012 This image shows
the infrared emission from the young star Fomalhaut and the dust
disc surrounding it, as recorded with ESA's Herschel Space
Observatory at a wavelength of 70 micron. To explain the
emission from Fomalhaut's debris disc, astronomers invoke a
steady production of dust particles via comet collisions, with
an average rate of 2000 daily collisions between comets of one
kilometre across or, alternatively, of 2 daily collisions
between 10-kilometre-diameter comets. Topics: Disaster Accident,
Environment, Technology Internet, Space, Electromagnetic
radiation, Stars, Circumstellar discs, Astronomy, Herschel Space
Observatory, Infrared, Star, Debris disk, Fomalhaut, Piscis
Austrinus constellation, Castor Moving Group, Comet