Around 13 times per century, Mercury passes between Earth and the sun in a rare astronomical event known as a planetary transit. Youtube

 

How did Earth evolve from a hostile planet that was covered by lava to a habitable planet ...

FU Berlin press release hereNature 

The TRR170 Data Portal provides information on TRR 170 data and other international repositories for the planetary community. 

 

Oct   29-31, 2019 Paneth Kolloquium
Dec  09-13, 2019 AGU Fall Meeting