The Broken Cosmic Distance Ladder
38.1 هزار بار بازدید -
2 سال پیش
-
Measuring distances to astronomical objects
Measuring distances to astronomical objects outside our Galaxy is a surprisingly hard challenge: it wasn't until 1923 that Edwin Hubble obtained proof that Andromeda is indeed a galaxy in its own right. Today, astronomers extend distance measurements in the cosmos to the edge of the visible Universe, building up a 'cosmic distance ladder' made of several rungs.
This talk will explore a major conundrum of contemporary astronomy: as observations have become more precise, the distance ladder appears today to be broken.
A lecture by Roberto Trotta
The transcript and downloadable versions of the lecture are available from the Gresham College website:
https://www.gresham.ac.uk/lectures-an...
Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. There are currently over 2,500 lectures free to access. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham's mission, please consider making a donation: https://gresham.ac.uk/support/
Website: https://gresham.ac.uk
Twitter: Twitter: greshamcollege
Facebook: Facebook: greshamcollege
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This talk will explore a major conundrum of contemporary astronomy: as observations have become more precise, the distance ladder appears today to be broken.
A lecture by Roberto Trotta
The transcript and downloadable versions of the lecture are available from the Gresham College website:
https://www.gresham.ac.uk/lectures-an...
Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. There are currently over 2,500 lectures free to access. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham's mission, please consider making a donation: https://gresham.ac.uk/support/
Website: https://gresham.ac.uk
Twitter: Twitter: greshamcollege
Facebook: Facebook: greshamcollege
Instagram: Instagram: greshamcollege
2 سال پیش
در تاریخ 1400/11/15 منتشر شده
است.
38,116
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