BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Science Circle - ECPv6.15.13//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Science Circle
X-ORIGINAL-URL:https://sciencecircle.org
X-WR-CALDESC:Events for Science Circle
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/Los_Angeles
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20170312T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20171105T090000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20180311T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20181104T090000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20190310T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20191103T090000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20180224T100000
DTEND;TZID=America/Los_Angeles:20180224T110000
DTSTAMP:20260414T190243
CREATED:20180201T095929Z
LAST-MODIFIED:20180218T104927Z
UID:4852-1519466400-1519470000@sciencecircle.org
SUMMARY:"Discrepancies in the Measured Expansion Rate of the Universe"
DESCRIPTION:“Discrepancies in the Measured Expansion Rate of the Universe”\nAbstract:\nThe most basic parameter in our description of the expanding Universe is the current expansion rate\, given by the Hubble Constant.\nA mere two decades ago\, the value of that constant was uncertain to a factor of two. Since then\, the face of cosmology has changed\, and we are now in an era of precision cosmology. We are able to measure the value of the Hubble Constant to within a few percent. The problem is\, we now have two measurements– one from nearby objects such as variable stars and low-redshift supernovae\, and the other from statistics of fluctuations in the early Universe. The two measurements are different at about the six-percent level\, which is greater than the uncertainties on the individual measurements. While astronomers of two decades ago would dream to be in this situation\, we find ourselves questioning whether there is something going on in the expanding universe that we haven’t figured out\, or whether it is a matter of systematic uncertainties that we haven’t yet identified.\nIn this talk\, I will discuss the history of both the Universe and of our dominant model of the Universe. I will describe how the Hubble Constant went from being extremely uncertain to relatively well known… well enough that we can see a discrepancy in two different measurements. I will describe the two ways we measure the Hubble Constant\, and talk about possibilities for resolving the discrepancy in their results. \n  \n— Rob Knop  \nPrevious work in the Library \nPrevious work in the Film Collection \n  \n  \n  \nIs this the first time you will attend a presentation with us?\nFollow this link first. \n 
URL:https://sciencecircle.org/event/astrophysics/
LOCATION:Auditorium
ATTACH;FMTTYPE=image/jpeg:https://sciencecircle.org/wp-content/uploads/2018/02/450px-CMB_Timeline300_no_WMAP.jpg
END:VEVENT
END:VCALENDAR