Since the solstice occurs so late at night Philly time, is the longest day the 20th or the 21st? The answer: Both. The ...

A hybrid eclipse, where both total and annular eclipses appear simultaneously, occurs rarely. Depending on the observation ...

Astronomy has lost one of its most assiduous calculators of eclipses with the passing of astronomer Fred Espenak, known ...

Fred Espenak, an astrophysicist that Astronomy magazine dubbed "Earth's premiere authority on solar eclipses," died Sunday, June 1, at his home in Portal, Arizona. He was 71 years old.

On April 15, many of us in the eclipse community received this message from Fred Espenak, the man who for years was affectionately referred to as Mr. Eclipse: Dear Friends. I want to share some ...

(NASA's Scientific Visualization Studio/Fred Espenak/Scott Sutherland) The names they chose were mostly inspired by the lunar calendars of indigenous peoples living in Canada and the United States ...

In 1970 and with a fresh driver’s license, teenage Fred Espenak persuaded his parents to let him drive 600 miles to a small North Carolina town to stare at the sky. On a grassy field behind a ...

Fred “Mr. Eclipse” Espenak announced yesterday that he has been diagnosed with Idiopathic Pulmonary Fibrosis, a progressive lung disease. The former NASA astrophysicist is renowned for ...

Credit: NASA's Scientific Visualization Studio/Fred Espenak/Scott Sutherland This name originates from the lunar calendar of the indigenous peoples living in what is now the US Northeast.

The stamp featuring an images taken by retired NASA astrophysicist Fred Espenak of total solar and Moon which was revealed by body heat. (Image: USPS/Espenak) ...