Scientists have recently expressed concerns about the accuracy of popular eclipse maps following new calculations. The path of totality, where the moon completely blocks out the sun, may be slightly narrower than initially predicted by NASA. This means that some cities on the edge of the route may not experience total darkness as expected. While NASA has not changed its predictions, the space agency advises that there is some uncertainty in mapping the eclipse’s path.
The calculations that have raised concerns were made by John Irwin, a software developer based in Guildford, England. Irwin’s map, published on a webpage called Besselian Elements, indicates that the path of totality might be slightly different from what NASA originally calculated. However, these calculations have not been thoroughly reviewed by scientists. Even if Irwin’s map is correct, the difference in the path of totality is only a couple thousand feet on the edges.
Dr. Edward Guinan, a professor of astronomy and astrophysics at Villanova University, recommends that viewers should aim to be in the middle of the path of totality for optimal viewing purposes. He warns against being near the edge of the path as the difference in experiencing totality and partial darkness is significant.
NASA also acknowledges that there is uncertainty in accurately measuring the size of the sun, which affects eclipse predictions. Determining the exact measurement of the sun’s size is challenging due to its fuzzy surface. Additionally, uncertainties in Earth’s rotation can also affect eclipse predictions.
While Irwin’s alternative eclipse map offers the possibility of catching a prolonged glimpse of eclipse-related phenomena at the edge of the path, such as the diamond ring effect, both Guinan and NASA advise against traveling to the edge. They emphasize that traveling towards the center of the path of totality, even by a mile or two, significantly increases the length of totality that viewers can experience.
The phase of totality during an eclipse is where the real show happens. The area is plunged into darkness, temperatures drop, animals behave as if it’s nightfall, and the sun’s corona becomes visible. Bright stars and planets also shine in the surrounding sky. Guinan describes the total eclipse as a spectacular event that viewers won’t want to miss.
In conclusion, while concerns have been raised about the accuracy of popular eclipse maps, NASA has not changed its predictions for the upcoming total solar eclipse. Viewers are advised to aim for the center of the path of totality for the best viewing experience. The phase of totality offers a unique and awe-inspiring spectacle that shouldn’t be missed.
