The September equinox occurs at 20:02 UTC. The Sun will shine directly on the equator and there will be nearly equal amounts of day and...

This September 20, the Moon will located on the same side of the Earth as the Sun and will not be visible in the night sky. This phase...

This September 20, the Moon will located on the same side of the Earth as the Sun and will not be visible in the night sky. This phase...

This September 20, the Moon will located on the same side of the Earth as the Sun and will not be visible in the night sky. This phase...

This September 20, the Moon will located on the same side of the Earth as the Sun and will not be visible in the night sky. This phase...

This September 20, the Moon will located on the same side of the Earth as the Sun and will not be visible in the night sky. This phase...

This September 12, the planet Mercury reaches greatest western elongation of 17.9 degrees from the Sun. This is the best time to view...

This September 12, the planet Mercury reaches greatest western elongation of 17.9 degrees from the Sun. This is the best time to view...

This September 12, the planet Mercury reaches greatest western elongation of 17.9 degrees from the Sun. This is the best time to view...

This September 12, the planet Mercury reaches greatest western elongation of 17.9 degrees from the Sun. This is the best time to view...

This September 12, the planet Mercury reaches greatest western elongation of 17.9 degrees from the Sun. This is the best time to view...

This September 6, the Moon will be located on the opposite side of the Earth as the Sun and its face will be fully illuminated. This...

This September 6, the Moon will be located on the opposite side of the Earth as the Sun and its face will be fully illuminated. This...

This September 6, the Moon will be located on the opposite side of the Earth as the Sun and its face will be fully illuminated. This...

This September 6, the Moon will be located on the opposite side of the Earth as the Sun and its face will be fully illuminated. This...

This September 6, the Moon will be located on the opposite side of the Earth as the Sun and its face will be fully illuminated. This...

This September 5, Neptune will be at its closest approach to Earth and its face will be fully illuminated by the Sun. It will be brighter...

This September 5, Neptune will be at its closest approach to Earth and its face will be fully illuminated by the Sun. It will be brighter...

This September 5, Neptune will be at its closest approach to Earth and its face will be fully illuminated by the Sun. It will be brighter...

This September 5, Neptune will be at its closest approach to Earth and its face will be fully illuminated by the Sun. It will be brighter...