PROMI­NENCES

Sky at Night Magazine - - SUMMER OBSERVING -

Of all the phe­nom­ena vis­i­ble through a hy­dro­gen-al­pha so­lar tele­scope promi­nences are surely the most fas­ci­nat­ing to ob­serve. Th­ese vast, tow­er­ing clouds of plasma ex­tend­ing from the limb of the Sun take on many forms, from huge flame-like pro­tru­sions to long ‘hedgerows’ and even great loop­ing arcs. Some vis­i­bly change shape over the course of tens of min­utes as the ma­te­rial in them moves along magnetic field lines.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.