The greatest sky spectacle of 2017 is the first Total Solar Eclipse over the U.S. mainland in 38 years. Read our full article in The 2017 Old Farmer's Almanac. Overall, in 2017, there will be four eclipses, two of the Sun and two of the Moon. In 2018, there will be five eclipses in 2018, three of the Sun and two of the Moon. Solar eclipses are visible only in certain areas and require eye protection to be viewed safely. Lunar eclipses are technically visible from the entire night side of Earth, but during a penumbral eclipse, the dimming of the Moon’s illumination is slight.