Pluto is not a planet anymore
The
International Astronomical Union has finished its deliberation,
and
Pluto has been demoted to "Dwarf Planet". So Now there are 8
Planets, an as yet to be determined number of Dwarf planets (Pluto,
UB313, possibly
Ceres and
2005 FY9), and an as yet unnamed group of small icy things.
The blogosphere is all aflury with the news. Stuart has a good
report
hot from the IAU. Both the
Bad Astronomer and
Tom ruminate on the meaning of all this.
On
Jodcast (nimbly edited by Stuart) you can listen to an edited
version of the deliberations (and there are also heaps of good IAU
links). The video of the full deliberations is
here.
Blast, I was looking forward to 12 planets. My
Very Easy Memory Jingle Seems Useful Naming .... seems a bit silly
now. Maybe it should be My Very Easy Memory Jingle Seems UB-less Now
The Planets
Mercury - On the
1st, Mercury is at superior conjunction with the Sun. From
mid-September, Mercury is in a great position for observation,
rising in the western evening sky. Mercury meets Mars mid-month,
coming to within 0.5 degrees of the red planet on 16th. On 24th,
Mercury is close to the crescent Moon before heading towards Spica
on 28th.
Venus - is too close to the Sun to observe.
Mars - In
mid-September, Mars has a close encounter with Mercury.
Jupiter - can be
found high in the western sky in the early evening. On 26th, it
appears close to the Moon.
Saturn - is found
in Leo at the start of the month. The ringed planet will come close
to the Moon on the 19th.
Uranus - is at
opposition on 5th of the month before passing behind the Moon on the
8th.
Neptune - found in
Capricornus, transits the meridian at about 9:30pm.
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