Showing posts with label Sri Lanka Astronomical Association. Show all posts
Showing posts with label Sri Lanka Astronomical Association. Show all posts

Ask an Astronomer

It's not usual to have professional astronomers visiting Sri Lanka, in fact the number of Sri Lankan Professional Astronomers are probably less than a dozen and most of them resides abroad except Prof. Kavan Ratnatunga, a retired research astronomer who's settled in Colombo enjoying his hobbies and serving as the President of Sri Lankan Astronomical Association. Of course whenever any of our astronomers visit Sri Lanka for holiday, I never miss the opportunity to get hold of them and organize events locally. It's not everyday you meet an astronomer, and students find it fascinating to meet and discuss astronomy with a "real" astronomer.

Other than the Sri Lankan astronomers, we have been visited time to time over the years by a foreign astronomer - Michael Snowden - who's very fond of Sri Lanka, and a long term friend of late Sir Arthur C Clarke. I met Micahel through Prof. Kavan in 2005 and ever since we have been good friends and done quite a few programs together. In his last visit in March 2010, I organized a discussion session called "Ask an Astronomer" for few high school students which turned out to be very well received. The objective of the session was to gather couple of students who are serious about pursuing higher studies in Astronomy and give them an opportunity to interact with an astronomer directly, learning, raising their questions, sharing their views...

Michael returned last month again, and as usual I organized couple of events with him. We managed to do another session on "Ask an Astronomer" with 6 high school students. The discussion started with Michael talking about Exoplanets - a much discussed topic these days and then the students got the opportunity to join the discussion raising questions and talking various aspects of Astronomy. Also another important subject discussed during the session was higher education in Astronomy! Each student talked about their field of interest in astronomy and was advised how they can achieve it, what are the available options, etc... Overall the session went well clearing some doubts, sharing more knowledge and most of all inspiring them to continue the path to higher education in Astronomy.

This was a much needed session as Sri Lanka currently is in a critical place as there are only 2 students doing higher studies in Astronomy or related fields. Although the interest in astronomy among students is high, many hesitant to continue that enthusiasm to do higher studies mainly due to lack of guidance, financial support, less awareness of opportunities, etc... Via Sri Lanka Astronomical Association, we hope to hold more of these sessions to help the students and encourage them to pursuit their dream.


The session was also a part of "ET are you out there - Voyager Campaign" and was held on the 30 October 2010 at the Cinnamon Grand Hotel, Colombo.

Michael Snowden with students.




Remembering Sir Arthur C Clarke



It’s been two orbits since Sir Arthur Clarke(16 December 1917 – 19 March 2008) departed Earth and started his own personal final odyssey among Stars.

As a tribute to him, a commemorative public program was organized on 17th March 2010 at the British Council Colombo. The program was organized by Sri Lanka Astronomical Association in collaboration with Arthur C Clarke Estate and British Council.

Guest Speaker of the event: Nalaka Gunawardene gave an illustrated talk – “Sir Arthur C Clarke: Man Who Lived in the Future”.


some photos from the event:

Thilina Heenatigala - General Secretary of Sri Lankan Astronomical Association addressing the crowd.


Guest speaker Nalaka Gunawardene delivering his illustrated talk “Sir Arthur C Clarke: Man Who Lived in the Future”


Participants


Participants


Sir Arthur Clarke Exhibit at the entrance



Sir Arthur C Clarke: 90th Birthday Reflections

Expedition to Northern Sri Lanka – Annular Solar Eclipse 2010


An Eclipse of the Sun is one of those spectacular displays of nature one must watch in your lifetime. Eclipses have fascinated humans through recorded history.
The next Solar Eclipse to cross Sri Lanka on 2010 January 15th is an Annular and visible in Northern Sri Lanka. The northern territory was not accessible to public until recently due to civil war in Sri Lanka.

This will be a historical moment as it will be the first time most of us are traveling to North after 30 years of war. It is a perfect opportunity to celebrate the Peace in Sri Lanka through this natural phenomenon – Annular Solar Eclipse 2010.

Annular Eclipse of 15th January 2010 is visible within a narrow stretch of 300 km width across Central Africa, Maldives, South Kerala, South Tamil Nadu, North Sri Lanka, Burma and China. It will visible as a partial eclipse in much of Africa, Eastern Europe, Middle East and Asia.

Path of the Eclipse


For Sri Lanka, the annular is visible in Northern region. The Annular phase will have the longest duration of over 10 minutes from about 1:20 to 1:30 PM (local time) at an altitude of 55 degrees at the center-line of the eclipse which crosses Jaffna (North). About 84.2% of the center of Sun will be covered by the Moon, and the Sun will look like a ring of Fire. The instant of greatest eclipse occurs at 07:06:33 UT when the eclipse magnitude will reach 0.919.


The southern border (Blue) of the path crosses just north of Chilaw on the west coast and north of Nilavali on the East coast. The border crosses south of Anuradhapura, just north of Eppawala. The center-line (Red) crosses Jaffna where the Annular phase will have the longest duration of over 10 minutes from about 1:20 to 1:30 PM at an altitude of 55 degrees. About 84.2% of the center of Sun will be covered by the Moon, and the Sun will look like a ring of Fire.


Sri Lankan Observers

Groups from Colombo Planetarium, Arthur C Clarke Center, University of Moratuwa and Sri Lanka Astronomical Association will be traveling to North for the Eclipse. Some will be producing scientific data while others will enjoy the eclipse doing public out reach programs.


Expedition to North

Group of us representing Sri Lanka Astronomical Association, SkyLK.com, Astronomy & Space Study Center and Royal College Astronomical Society will be traveling to North to catch this ring of fire as well.
Our motive is to do a live web-stream the eclipse via SkyLK website. We will be getting the local crowd to join us to experience this wonderful phenomenon as well.

Jaffna (North), has better skies than Colombo, night of 15th we have planned to hold a little star party to bring more joy to the people from North as well.


TEAM

1. Thilina Heenatigala – Sri Lanka Astronomical Association
2. Anuradha Jayathilaka – SkyLK
3. Hasitha Karunaratne – SkyLK
4. Madusha Dedigamuwa – SkyLK
5. Imesh Perera – Astronomy & Space Study Center
6. Plashthi Kanaththage – Astronomy & Space Study Center
7. Prasanna Deshapriya – Sri Lanka Astronomical Association
8. Thishan Pavithra - Astronomy & Space Study Center
9. Bhasura Gunawardhana – Royal College Astronomical Society
10. Shamil Asitha Kuruppu – Royal College Astronomical Society



For more information please contact:
Thilina Heenatigala
e: thilina.heenatigala@yahoo.com
p: (+94) 0716 245 545


IMPORTANT: NEVER Look at the Sun directly with your naked eye.



Resources
Solar Eclipses
Solar Eclipse on 15th January 2010
NASA Eclipse Site
Fred Espenak’s Eclipse site
Lakdiva Eclipse page


Sources: NASA/GSFC, Prof. Kavan Ratnatunga, Fred Espenak, Thilina Heenatigala

"Facts and Speculations in Cosmology" - public lecture by Prof.Jayant Narli

`Facts and Speculations in Cosmology'

by Professor Jayant Narlikar,

Emeritus Professor,
Inter-University Centre for Astronomy and Astrophysics,
Pune, India

3rd December 2008 (Wednesday), 4 PM

Public Lecture 64th Annual Sessions of SLAAS

Prof V K Samaranayake Auditorium, UCSC
University of Colombo

FACTS AND SPECULATIONS IN COSMOLOGY


This talk will discuss the present state of cosmology, the subject
dealing with the studies of the origin, evolution and end of the
universe in the large. In ancient times the thinkers had detailed
and complex notions about the cosmos but those were speculations
with no basis in real facts. With the progress of observational
astronomy, our understanding about larger and larger parts of the
universe grew and speculations gave place to more facts and science
based ideas. Modern cosmology is around a century old and it took
shape around Einstein's general relativity and the data on galaxies
from Edwin Hubble and his coworkers. Thus the concept of the
expanding universe was born. We will describe the successes of this
concept which have led cosmologists in modern times to be bolder and
apply their equations to find what the universe was like soon after
the big bang. It will be argued that despite the claimed results of
this approach, it is highly speculative and in many respects
unscientific.

Bio
Professor Jayant Vishnu Narlikar (born July 19,1938) (Marathi: प्रा. जयंत विष्णू नारळीकर) is an eminent Indian astrophysicist. Narlikar is considered a leading expert and defender of the steady state cosmology. His work on conformal gravity theory with Sir Fred Hoyle, called Hoyle-Narlikar theory, demonstrated a synthesis can be achieved between Albert Einstein’s theory of relativity and Mach's principle. India’s second highest civilian honour, Padma Vibhushan, was awarded to him for his work. Prof. Narlikar is the founder director of the Inter-University Centre for Astronomy and Astrophysics (IUCAA) at Pune, India.
http://en.wikipedia.org/wiki/Jayant_Narlikar