Coming:

1. This will be the first total solar eclipse in the continental U.S. in 38 years. The last one occurred February 26, 1979.  Totality in Casper, Wyoming begins at 11:42 am.
2.  A solar eclipse is a lineup of the Sun, the Moon, and Earth. The Moon, directly between the Sun and Earth, casts a shadow on our planet.
3.   A solar eclipse happens at New Moon. The Moon has to be between the Sun and Earth for a solar eclipse to occur.
4.  Solar eclipses don’t happen at every New Moon. The reason is that the Moon’s orbit tilts 5° to Earth’s orbit around the Sun.
5.  Eclipse totalities are different lengths. The reason the total phases of solar eclipses vary in time is because Earth is not always at the same distance from the Sun and the Moon is not always the same distance from Earth.
6. It’s all about totality. Only totality reveals the true celestial spectacle: the diamond ring, the Sun’s glorious corona, strange colors in our sky, and seeing stars in the daytime.
7.  The center line crosses through 10 states. In Wyoming,  the umbral center line dwells until just past 11:49 a.m
8. The center line crosses through 10 states. In Wyoming,  the umbral center line dwells until just past 11:49 a.m. MDT.