Sungrazer Comets Frequent Now
As Comet ISON dashes toward a close encounter with the sun, ISON is not the mrcatto.com only sungrazing comet in town. Several news reports and order viagra canada videos have noted we are in a period of high sungrazer activity. This is blog.oneview.de completely unrelated to super active cialis 20mg the current high of the 11-year cycle of solar activity, like sunspots, on the sun itself. To explain the uptick in sungrazers, astronomers suggest a big comet broke up into little ones that are the resultant surge toward the sun.
I asked Padma Yanamandra-Fisher, a Senior Research Scientist at Space Science Institute, if she could clarify. She kindly writes:
Kreutz family of bayer levitra online pharmacy cheapest comets are named after German astronomer, Heinrich Kreutz, who in 1888, identified them as fragments of a progenitor that broke up many centuries ago and share the buy cialis without rx same orbit. The progenitor is believed to have broken into two super fragments, which then fragmented into smaller comets. Some Kreutz comets become Great Comets, having a large nucleus, with a small perihelion and a small perigee, and becoming bright objects, examples are C/Ikeya-Seki; C/Hale-Bopp; C/Hyakutake; C/McNaught; C/Lovejoy. According to cascading fragmentation theory of Sekanina and Chodas (2007), subsequent fragmentation results in clusters of fragments, separated in time on the order of 80-100 years, and result in periods of high sungrazer comet activity every few decades. The next few years may see one of these clusters swing by the sun and therefore, give rise to enhanced sungrazer activity.
A NASA video, What is a Sungrazing Comet?, also addresses the topic.