April 11, 2010 ALP Monthly
Last April 11, 2010, members of
the Astronomical League of the Philippines (ALP) held
their monthly meeting at the Manila Planetarium at
3:00pm. Members who attended were ALP President
James Kevin Ty and son Kendrick Cole (KC) Ty, PRO
Armando Lee, wife Myra Lee and son Jason Lee, Andrew Ian
Chan, Berenice Chan, Treasurer Henry So, director
Edgar Ang, Tommy Tan, Belen Pabunan, Christopher Louie
Lu , Mark Ian Singson, Michael Cruspero, Mark Joven
Cortel, Reynen Pansanos, Nel Lagda and new member Maria
The meeting started at around
3:30pm with ALP PRO Armando Lee giving a short
comprehensive lecture entitled Galactic Spiral
Arms. The lecture topics covered were the following:
Spiral arms in the Milky Way and other galaxies, Star
forming regions highlighting the spiral features,
Mechanisms for formation and persistence of spiral arms.
These are topics rarely lectured on and discussed in
astro club meetings and it was indeed a rare occasion
having this lecture in the latest ALP monthly meeting. A
short but comprehensive lecture it was, mathematical
model for the spiral arm structure was presented and Dr
Lee ended the lecture emphasizing the following point:
Spiral arms do not rotate at the same
rate as the stars that comprise them, but can be
explained as density waves moving relative to the
background material. The members were delighted to learn
about the topic and they were promised more similar
topics in the coming meetings.
ALP PRO Armando Lee giving an
interesting lecture on Galactic Spiral Arms.
ALP President James Kevin Ty
gives an overview of the upcoming May 16 Venus
Occultation by the Crescent Moon.
ALP President James Kevin Ty discussed the upcoming May
16 Venus Occultation by the thin Crescent Moon.
This will happen around 7:35pm with the planet Venus
disappearing on the dark limb of the Moon and
reappearing again on the bright limb of the Moon more or
less around 8:15pm. Full details of the event will
be posted in the ALP main page in the days to come. ALP
will setup 2 main observing sites in Astrocamp
Observatory in SM MOA area which will be lead by ALP PRO
Armando Lee and another in Nasugbu, Batangas which will
be lead by ALP President James Kevin Ty.
The meeting ended at around