The next total solar eclipse to cross the United States is just seven years away on April 8, 2024.It will be visible in a number of major US cities including Carbondale, Illinois, which was on the path of totality for yesterday's eclipse.In April 2024, the totality will start in Texas moving across Arkansas, Missouri, Illinois, Kentucky, Indiana, Michigan, Ohio, Pennsylvania, New York, Vermont, New Hampshire and Maine.
Most years have 4 eclipses, which is the minimum number of eclipses that take place in a year; 2 of these 4 eclipses are always solar eclipses. While rare, the maximum number of eclipses that can take place in a calendar year is 7.
On to what will happen on August 21, 2017, a total solar eclipse is the rarest of the three solar eclipse types mentioned. In order for this event to happen, the Moon must be at new phase and not be near apogee in its orbit around the Earth. Much like the annular eclipse, only a select few will be able to witness the event in a narrow corridor which stretches across the Earth from West to East.
An annular solar eclipse is much more rare than a partial solar eclipse. Even though a partial eclipse is seen by many during these events, the annular phase is only seen in a narrow corridor across the Earth. What causes the ‘ring in the sky’ is down to the elliptical orbit of the moon. During these events, a noticeable darkening of the sky can be seen but not to the dramatic extent that a total solar eclipse can.of the Moon.
This type of eclipse is witnessed during the build up to a total solar eclipse, annular solar eclipse or just during an eclipse that will only ever be partial. Often seen from a large area of Earth, these types of solar eclipses are seen more often than any.As the illustration later below shows, a partial eclipse is observed from Earth when it is in the Moon’s outer shadow or ‘Penumbra’. The ever-so-slight darkening caused by the ‘Penumbral Shadow’ is hardly noticeable. It’s the point between full sunlight and complete shadow from the Moon.