A Portrait of the Sun as a Young Star @itelescopewebinars

Uploaded December 2023 | Updated September 2026, 2 weeks ago

Guest Speaker: Ivey Davis, PhD Student, Cal Tech University, California

Summary: In this webinar, Ivey introduces us to space weather on the sun and on other stars. She explains that space weather refers to both the electromagnetic radiation that is seen in the form of solar flares as well as all the particles that emanate due to the flare event. These particles include photons, electrons, and protons. In the past, space weather was difficult to observe due to the brightness of the sun’s surface. That changed with the invention of coronagraphs. Extreme energetic solar flares can produce Coronal Mass Ejections (CMEs). Understanding the space weather produced by the sun helps us understand the space weather from other stars.

If you are interested in solar astronomy, this video will open your eyes to the fascinating world of space weather. We hope you enjoy it!

iTelescope itelescope.net

Chapters
0:00 Introduction
1:52 Instrumentation
9:40 Presentation Overview
10:25 Space Weather background
15:06 What produces Space Weather
18:24 How do you observe Space Weather?
21:37 Visible Light
27:23 Space weather for younger stars
28:40 Radio Light
32:30 Using the Long Wavelength Array …Owens Valley Radio Observatory
38:45 Space Weather for longer stars in Radio Light
42:41 Summary

#iTelescope
#astrophotography
#deepsky
#astro
#astronomy
#cosmology

Creating a Robotic Remote Observatory for Astrophotography in Utah

Collapsing Galaxies Creating Black Holes with Dark Matter at Cosmic Dawn

$The Grand Design: How Large Scale Structure Illuminates Cosmology and Particle Physics Title: The Grand Design: How Large-Scale Structure Illuminates Cosmology and Particle Physics– 8-09-2024 Guest Speaker: Abbe Whitford, PhD Student, University of Queensland, Australia. Summary: In this webinar Abbe presents how large-scale structures in the universe, of the order of GPCs (giga-parsecs), can inform scientists on cosmology and the nature of particle physics. She begins by explaining that the study of large-scales structure is important to help determine the distribution of normal matter, dark matter, and the radiation of the early universe, after the big bang. Right after the big bang, the radiation domination epoch began, where most of the energy was in the form of radiation. Over time the radiation decreased, and density of matter increased. As time continued, the dark energy domination epoch began, which is believed to be driving the expansion of the universe. On the other hand, early in the universe it is believed that neutrinos stopped interacting with other particles and started flying freely. Although it was believed that these particles had no mass, now it seems that they might have a small mass. Based on the analysis presented, the mass of neutrinos might have a direct impact on the structure of the universe. If you are interested in the study of cosmology and how it might have been influenced by neutrinos, this video will be for you. We hope you enjoy it! iTelescope https://www.itelescope.net The University of Queensland Australia https://www.uq.edu.au Astrobites.com https://www.astrobites.org/author/awhitford/ Chapters 00:00- Introduction 01:28- Using the Large-scale Structure of the Universe 06:05- Why do we care about the Large-scale Structure of the Universe? 11:39- Part 1: Uncovering the nature of the Universe with the motions of galaxies. 19:07- Poll Question 1 (How fast do you think the peculiar motion can be?) 20:47- Dark Matter Field vs Normal Matter Field 26:02- Poll Question 2 (What fraction of matter do you think is just the dark matter?) 28:57- The bulk flow motions of galaxies 39:33- CosmicFlows 4 dataset 43:22- Part 2: Using the sound waves in the early Universe to understand neutrinos. 44:39- Poll Question 3 (How fast did sound waves move in the early Universe?) 46:43- Sound Waves as Bubbles or BAO’s data results 51:57- How is this related to neutrinos? And firstly, what are neutrinos? 59:36- Questions and Answers #iTelescope #astrophotography #astronomy #astro #deepsky #cosmology$