Rare spiral sunspot
NSO/AURA/NSF · Download full size image
Rare spiral sunspot
This picture of an unprecedented spiral-shaped sunspot was captured by National Solar Observatory astronomers on February 19th 1982, using the Kitt Peak Vacuum Telescope. Sunspots are normally seen as irregularly shaped dark holes. This spiral sunspot had a diameter of approximately 50000 miles - about six times the diameter of the Earth - and held its shape for about two days before it broke up and changed its form. Posted on: 28 Feb, 2005
Latest Thoughts
Managing Diabetes with a Cell Phone
Tracking Hurricanes with 3-D Technology
Weak Economy Can Lead To Poor Health
Procedure Fixes Flat Feet
Vitamin B May Prevent Heart Disease
Machine Kills Cancer Cells Faster Than Ever Before
RSS Feeds