Webinar 18 on “Origin and Evolution of Solar System”
Talk 1 Our place in the Universe PPT and VIDEO
Talk 2 Chronology of the Solar System PPT and VIDEO
Talk 3 Cardinal Q. (1). .... Solar System PPT and VIDEO
Talk 4 Cardinal .... Q. (2) ..Solar System PPT and VIDEO
Talk 5 A million Sun at the begnning PPT and VIDEO
Space Education and Research Foundation announces, its 18th webinar. This will be on “Origin and Evolution of Solar System”. This webinar will have five scientific talks by Dr. Ritesh Kumar Mishra. The live transmission will be daily one talk during 06:00 to 07:00 UT on 21st, 22nd, 23rd, 24th and 25th October 2019.
Talk 2 Chronology of the Solar System PPT and VIDEO
Talk 3 Cardinal Q. (1). .... Solar System PPT and VIDEO
Talk 4 Cardinal .... Q. (2) ..Solar System PPT and VIDEO
Talk 5 A million Sun at the begnning PPT and VIDEO
Space Education and Research Foundation announces, its 18th webinar. This will be on “Origin and Evolution of Solar System”. This webinar will have five scientific talks by Dr. Ritesh Kumar Mishra. The live transmission will be daily one talk during 06:00 to 07:00 UT on 21st, 22nd, 23rd, 24th and 25th October 2019.
The titles of the talks are as follows:
Talk 1: Our place in the Universe on 21st October 2019
Talk 2: Chronology of the Solar system on 22nd October 2019
Talk 3: Cardinal Question (1) of the Solar system: Born with a bang or Bleat on 23rd October 2019
Talk 4: Cardinal Question (2) of the Solar system: To be or not to be Homogeneous in 26Al on 24th October 2019
Talk 5: A million Sun at the beginning on 25th October 2019
About the speaker (Dr. Ritesh Kumar Mishra)
Dr Ritesh Kumar Mishra was born in Dhawalpur
(Bhagalpur) Bihar. He grew up in different cities of India. His early education
was in AF School, Kendriya Vidyalayas and Sainik School Jamnagar. He earned
B.Sc.-B.Ed. (Physical Sciences) and M.Sc. Physics in Regional Institute of
Education, Bhopal and Department of Physics and Astrophysics at University of
Delhi, respectively. He did Ph.D. at Physical Research Laboratory, Ahmedabad
and Post Ph.D., work at Centre du Recherches Pétrographiques et
Géochimiques (CRPG-CNRS) Nancy France, NASA Johnson Space Center Houston
USA, PRL India, and Ruprecht-Karl Universitat, Heidelberg Germany. Besides, his
interests in diverse scientific disciplines, he enjoys reading, writing and
discussions on different kinds of contemporary and ancient literature. He is a
good player of different games and sports. He explores to understand the
diversity of life, living in the present and past times around the world and is
committed towards a sustainable, symbiotic human life."
The summary of the talks given below:
Talk 1: Our place in the Universe
The ‘Sun' is an ordinary star but hosts an extraordinary
living planet- Earth; a kind that has not been seen anywhere else in the galaxy
until now. Some salient features of our Solar system, size, position,
composition, and neighbourhood will be discussed. Some recent discovery of key
'Solar system like' exoplanets from Kepler mission and other observatories will
also be discussed.
Talk 2: Chronology of the Solar system
A brief glimpse of formation stars and galaxy starting from
big bang will lead into discussion of various stages of formation of our Solar
system. A triggered collapse of a molecular cloud leading through very
energetic sequence of dynamic events determine the grand architecture of the
Solar system in a very short time period of a few million years. Specific
importance and presently known and unknowns of each of these steps will be
discussed setting the stage for discussion of amongst many, three major
questions regarding the origin and early evolution of the Solar system.
Talk 3: Cardinal Question (1) of the Solar system: Born with a bang or bleat!
Meteorites, their classification, and major components of
chondrites (Calcium, Aluminum-rich Inclusions (CAIs), Chondrules, Matrix) will
be discussed. This will be followed by a short primer on short-lived
now-extinct radionuclides and relative chronology. Homogeneity of Solar
system is a key requirement for using radioisotope as chronometer. The question
of homogeneity in the early Solar system will be discussed.
Talk 4: Cardinal Question (2) of the Solar system: to be or not to be Homogeneous in 26Al !
Our Solar system could have resulted from either a natural
gravitational collapse or alternatively be triggered by events in its
neighbourhood. Evidence of triggered collapse derived from abundance of a
unique short-lived now-extinct radionuclide, Iron-60 (60Fe) in
chondrules and its consequences will be discussed.
Talk 5: A million Sun at the beginning
All Sun like stars during their pre-main sequence stages are
highly active. Evidence of activity of the Sun during the pre-main sequence can
be inferred by studying preserved fossil records of some unique radionuclides
(e.g. Beryllium-10, Beryllium-7) in Calcium, Aluminum-rich Inclusions (CAIs).
Indirect evidence about this critical early stage of the Sun will be discussed.