Uploaded July 2025 | Updated September 2026, 3 weeks ago
Title: Probing the Shape of the Universe with the CMB 07-25-2025
Guest Speaker: Raul Ramirez, Student, University of Barcelona,Spain.
Summary: A fascinating talk by Raul Ramirez Nethersole from the Universitat de Barcelona exploring how the Cosmic Microwave Background reveals the geometry of the Universe. Raul will present results from an analysis of Planck 2018 SMICA temperature maps, used to estimate the curvature density parameter. If you are interested in the studies of CMB, this video will be for you. We hope you enjoy it!
iTelescope itelescope.net
The University of Barcelona https://www.ub.edu
Chapter Marks
0:00 Introductions
2:45 Presentation (Probing the Shape of the Universe with the CMB)
8:53 Poll Question # One (How large are the relative temperature fluctuations in the CMB?)
11:26 The Cosmic Microwave Background (CMB)
13:12 The CMB Angular Power Spectrum
15:22 Poll Question # Two (By looking at the Angular Power Spectrum of the CMB, what is the characteristic angular scale of temperature fluctuations?)
17:08 A rough intuition on the CMB Angular Power Spectrum
18:15 The CMB as a Probe for Cosmological Models: Testing Spatial Curvature
18:31 Poll Question # Three (What does it mean for our Universe to have curvature?)
24:37 Poll Question # Four (Are there any problems with this method?)
26:16 CMB: Finding a Big Triangle
29:31 Poll Question # Five (How does Curvature affect CMB Angular Power Spectrum?)
32:21 Quick Overview of CMB Data Analysis
39:27 Questions & Answers
#iTelescope
#astrophotography
#astronomy
#astrophysic
Title: Probing the Shape of the Universe with the CMB 07-25-2025
Guest Speaker: Raul Ramirez, Student, University of Barcelona,Spain.
Summary: A fascinating talk by Raul Ramirez Nethersole from the Universitat de Barcelona exploring how the Cosmic Microwave Background reveals the geometry of the Universe. Raul will present results from an analysis of Planck 2018 SMICA temperature maps, used to estimate the curvature density parameter. If you are interested in the studies of CMB, this video will be for you. We hope you enjoy it!
iTelescope itelescope.net
The University of Barcelona https://www.ub.edu
Chapter Marks
0:00 Introductions
2:45 Presentation (Probing the Shape of the Universe with the CMB)
8:53 Poll Question # One (How large are the relative temperature fluctuations in the CMB?)
11:26 The Cosmic Microwave Background (CMB)
13:12 The CMB Angular Power Spectrum
15:22 Poll Question # Two (By looking at the Angular Power Spectrum of the CMB, what is the characteristic angular scale of temperature fluctuations?)
17:08 A rough intuition on the CMB Angular Power Spectrum
18:15 The CMB as a Probe for Cosmological Models: Testing Spatial Curvature
18:31 Poll Question # Three (What does it mean for our Universe to have curvature?)
24:37 Poll Question # Four (Are there any problems with this method?)
26:16 CMB: Finding a Big Triangle
29:31 Poll Question # Five (How does Curvature affect CMB Angular Power Spectrum?)
32:21 Quick Overview of CMB Data Analysis
39:27 Questions & Answers
#iTelescope
#astrophotography
#astronomy
#astrophysic
