The Sky Tonight Update: Sept. 22, September Equinox

September Equinox

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 night throughout the world. This is also the first day of fall (autumnal equinox) in the Northern Hemisphere and the first day of spring (vernal equinox) in the Southern Hemisphere.

Advertisements

The Sky Tonight Update: Sept. 12, Mercury at Greatest Western Elongation

Mercury at Greatest Western Elongation

This September 12, the planet Mercury reaches greatest western elongation of 17.9 degrees from the Sun. This is the best time to view Mercury since it will be at its highest point above the horizon in the morning sky. Look for the planet low in the eastern sky just before sunrise.

The Sky Tonight Update: Sept. 5, Neptune at Opposition

Neptune at Opposition

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 than any other time of the year and will be visible all night long. This is the best time to view and photograph Neptune. Due to its extreme distance from Earth, it will only appear as a tiny blue dot in all but the most powerful telescopes.

Continue reading