[Alumnes] HOY 11:00hs - Seminario FCAG - Dr. Ramachrisna Teixeira

[Secretaría de Ciencia y Técnica]

Estimados,

Les recordamos que en el día de hoy, a las 11:00 hs. en el Salón 
Meridiano, tendremos un seminario a cargo del Dr. Ramachrisna Teixeira 
(Instituto de Astronomía, Geofìsica e Ciencias Atmosféricas, 
Universidade de São Paulo)*, el cual **se titula "From Sobral´s 
four-inches astrograph to the Gaia Space Mission era".**El **resumen del 
mismo lo pueden leer al final de este mensaje**.**
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**Les recordamos, además, que los objetivos de estos seminarios son el 
de generar un espacio ameno y activo de intercambio de ideas, para 
exponer nuestros trabajos y temas de investigación, o bien el de 
aquellos que circunstancialmente nos visitan en nuestra casa de altos 
estudios. Teniendo en cuenta que nuestra institución nuclea una gran 
diversidad de temas de investigación, y distintos estamentos académicos, 
este espacio resulta de vital importancia para conocernos, acercarnos y 
hasta generar posibles colaboraciones. **

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**Quedan todos cordialmente invitados y los esperamos 15 minuto**s antes 
con café y galletitas.

**Atentamente,

Secyt-FCAG

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Seminario:Ramachrisna Teixeira

Instituto de Astronomia, Geofísica e Ciências Atmosféricas

Universidade de São Paulo


Título:From Sobral's four-inches astrograph to the Gaia Space Mission era.

Resumen:Nowadays the Astronomy is reviving two historical moments. In 
one hand, we are seeing the radical change in the observational data on 
which the astronomical knowledge is based: about one year ago the second 
Gaia data release, DR2, was published. So, the most precise and the 
largest set of astrometric, photometric and spectroscopic data of all 
time became available to the community. Just few years ago we couldn't 
even dream about working with such huge and precise data base. On the 
other hand, we are also celebrating another very important moment of the 
Astronomy: in a few days on May 29, we are going to have the centenary 
of the first measurement of the gravitational displacement of the light 
beam from some Hyades stars (Sobral-Brazil and Prince-Africa) observed 
in two different circumstances: in normal conditions during the night 
and when the light beam was traversing the solar gravitational field 
during a total solar eclipse.  This measurement consisted in the first 
complete proof of Eistein’s General Relativity Theory. I invite you to 
talk about these two great moments of the Astronomy as a science and 
also to talk about the doors that were opened with the Gaia space 
mission and about the future of this kind of observation.

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