Gorgeous new supercomputer images reveal what the total solar eclipse might look like
But that hasn't stopped computer scientists from guessing.
Nearly anyone in the US can see the moon partially block the sun on Monday, weather permitting. However, those lucky enough to be in the 2,800-mile-long, 70-mile-wide path of totality will see the moon completely block the sun.
Totality will last about two minutes, and during that time, onlookers will not only view the darkest shadow of the moon, but also the sun's corona - a dim outer atmosphere of high-speed solar particles that's normally invisible during the day.
The corona is somewhat unpredictable, though, since the sun is a giant, dynamic, white-hot ball of super-heated plasma. The star is constantly feeding the corona with high-speed particles and changing its appearance.
To figure out what the corona will look on Monday, a scientific research company called Predictive Science, Inc., enlisted the help of three supercomputers to simulate a visual forecast of totality.
"This is our final prediction of the solar corona for the August 21, 2017 total solar eclipse," Predictive Science wrote on its website Thursday.
The 3D simulations take what is currently known about the sun - its magnetic field, output of particles, rotation rate, and more - and use mathematical models to push the fast forward button, according to a press release posted by the University of Texas at Austin. That university helped power the imagery with its Stampede2 supercomputer, in addition to the San Diego Supercomputer Center's Comet and NASA's Pleiades.
Here are a few of the simulations in the forecast and what they show.