September skies: fall equinox and oppositions

Here are the sky highlights this month:

  • 10. Full Moon. The Moon will be located on the opposite side of the Earth as the Sun and its face will be fully illuminated. This phase will occur at 5:58 a.m. Eastern. This full moon was known by early Native American tribes as the Corn Moon because the corn is harvested around this time of year. This moon is also known as the Harvest Moon. The Harvest Moon is the full moon that occurs closest to the September equinox each year.
  • 16. Neptune at Opposition. The blue giant planet 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.
  • 23. September Equinox. The September equinox will occur at 8:55 p.m. 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.
  • 25. New Moon. The Moon will be located on the same side of the Earth as the Sun and will not be visible in the night sky. This phase will occur at 9:55 p.m. This is the best time of the month to observe faint objects such as galaxies and star clusters because there is no moonlight to interfere.
  • 26. Jupiter at Opposition. The giant planet 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 Jupiter and its moons. A medium-sized telescope should be able to show you some of the details in Jupiter’s cloud bands. A good pair of binoculars should allow you to see Jupiter’s four largest moons, appearing as bright dots on either side of the planet.

If you’d like to become more involved with astronomy in South Florida and meet like-minded people, the South Florida Amateur Astronomers Association (www.sfaaa.com) at Markham Park is fantastic, equipped with a state-of-the-art telescope, and the perfect way to take the next step in discovering our celestial sky. Happy exploring!