BEGIN:VCALENDAR VERSION:2.0 PRODID:-//talks.cam.ac.uk//v3//EN BEGIN:VTIMEZONE TZID:Europe/London BEGIN:DAYLIGHT TZOFFSETFROM:+0000 TZOFFSETTO:+0100 TZNAME:BST DTSTART:19700329T010000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0100 TZOFFSETTO:+0000 TZNAME:GMT DTSTART:19701025T020000 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT CATEGORIES:LCLU Coffee Meetings SUMMARY:Manuel Scherf on "\;The evolution and prevalen ce of Earth-like Habitats in the Galaxy"\; - M anuel Scherf (Austrian Academy of Sciences) DTSTART;TZID=Europe/London:20241009T110000 DTEND;TZID=Europe/London:20241009T120000 UID:TALK222382AThttp://talks.cam.ac.uk URL:http://talks.cam.ac.uk/talk/index/222382 DESCRIPTION:The existence of Earth-like Habitats\, i.e.\, temp erate rocky exoplanets hosting Earth-like N2-O2-do minated atmospheres with minor amounts of CO2\, de pends on certain astrophysical\, geophysical\, and \, potentially\, biochemical criteria that must be met to allow for their evolution and environmenta l stability. One essential factor for the emergenc e and evolution of Earth-like atmospheres is a pla net's host star. Its radiation and plasma environm ent may affect atmospheric stability to such an ex tent that it can even render its existence unlikel y. Furthermore\, microbial life may be another par ameter needed to allow for the simultaneous existe nce of atmospheric O2 and N2 over geological times cales\, making an N2-O2-dominated atmosphere with minor amounts of CO2 a potential sign of life to b e present on such a planet. I will address these a nd further important parameters relevant to the ev olution of Earth-like atmospheres. First\, I focus on the terrestrial planets in our Solar System an d then apply our understanding of their atmospheri c evolution to assess the prevalence of Earth-like Habitats in the Galaxy and around stars of differ ent spectral types. LOCATION:Battcock\, Room F17 CONTACT:Paul B. Rimmer END:VEVENT END:VCALENDAR