Synoptic Observations of the Structure and Dynamics of Solar Eclipses; Exoplanet Analogues in Transits of Mercury and Venus

Speaker: 
Prof. Jay Pasachoff (Williams)
Date: 
Tuesday, March 5, 2019 - 4:00pm

On August 31, 2017, a total solar eclipse's band of totality swept across the Continental United States from coast to coast for the first time in 99 years.  I will show and discuss some of the the images and spectra my team has obtained at the most recent eclipses, including total eclipses in Easter Island (2010), Australia (2012), Gabon (2013), Svalbard (2015), Indonesia (2016), and the United States (2017) as well as comment on annular or partial eclipses observed elsewhere. I will discuss our observational tests underway for the comparison of models of coronal heating.  I will also discuss plans for the 2019 and 2020 total eclipses that cross Chile and Argentina.  I will also report on our observations of transits not only of the Sun by the Moon (that is, a solar eclipse), but also across the Sun by Venus and by Mercury.  I will discuss ground-based imaging and Total Solar Irradiance space measurements as well as observations of the 2012 transit of Venus with Hubble by reflection off Jupiter and directly with Cassini from Saturn. 

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