July 22, 2018

Death by Superflare?

A close runner-up in the pantheon of cosmic catastrophes is a killer flare courtesy of our Sun. While this may not be as lethal as a giant space rock, its also much more likely over the span of our short lifetimes. But what is the exact potential hazard posed by this threat? What has happened in the past? And what can be done about it? [Read more...]

Remembering the Super Flare of 1859.

This coming Tuesday marks the 150th anniversary of a unique astronomical event that has repercussions even today. On the morning of September 1st, 1859, Astronomer Richard Carrington found his routine of carefully drawing and recording the transit times of sunspot groups disrupted by an odd phenomenon emerging on the face of the Sun. The day dawned unusually sunny over his private observatory in Redhill, England, and 33 year old Carrington had taken to his usual daily task of sketching sunspot groups projected onto a screen in a darkened room. The scope used was a 2-meter long brass refractor, (scopes were often measured by focal length instead of aperture in those days) and it yielded an 11-inch diameter projected image of the Sun. the Sun itself had been extremely active most of the year, and there was plenty to draw.

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