40:37

The Cosmological Zoo: Particles in the Universe

53:03

Why Do Galaxies have a Redshift Proportional to Distance?

22:31

Homogeneity, Isotropy and the Cosmological Principle

48:06

Core-Collapse Supernovae

47:58

Evolution of Solar Mass Stars

23:27

The Solution to Olbers' Paradox

43:06

What is Cosmology?

04:22:14

The Sun: Measuring and Understanding the Closest Star

37:53

The Solar Neutrino Problem

05:28:46

The Realm of the Galaxies

01:16:28

Energy Transport in the Sun

26:55

Colliding and Interacting Galaxies

01:19:48

What is the Cosmic Redshift?

37:08

Active Galaxies, Quasars and their Evolution

30:53

Galaxy Evolution and Deep Surveys

35:28

Groups and Clusters of Galaxies

28:24

The Extragalactic Distance Scale

06:41:30

Big Bang Cosmology: The Origin and Fate of the Universe

01:09:31

Dark Energy, Supernovae and the Ultimate Fate of the Universe

01:07:18

Cosmic Inflation and the Origin of the Universe

48:19

Formation of Large Scale Structure in the Universe

17:23

Why Does Cosmic Expansion Cause Redshift?

04:38:42

Cosmic Calibration: Measuring the Properties of the Distant Stars

52:56

Big Bang Nucleosynthesis: The First Three Minutes of the Universe

27:27

Stellar Spectral Classification

01:01:28

The Cosmic Microwave Background

51:56

Redshift and The Big Bang

32:28

The Cosmological Principle

27:26

Stellar Mass, Luminosity and Lifespan

19:28

The Mass of Proxima Centauri b and Stellar Masses

33:06

Eclipsing Binary Stars, and their Masses and Planets

34:28

Star Clusters and Stellar Evolution

22:19

The Types of Binary Stars: Visual and Spectroscopic

33:25

Spectroscopic Parallax

15:24

Stellar Radii

29:53

Proper Motion and Parallax

24:22

The Core of the Sun

48:53

The Surface of the Sun

24:29

Our Local Star the Sun

02:11

Welcome to my Channel!

52:05

Active Galactic Nuclei and Quasars!

05:11

A Tour of the Universe

50:50

Nuclear Fusion in the Sun

41:17

The Evolution of High Mass Stars

35:43

The Hertzsprung Russell Diagram

35:50

The Hertzsprung Russell Diagram

23:56

The Core of the Sun

24:04

The Core of the Sun

49:01

The Surface of the Sun

24:16

Our Local Star: the Sun's Vital Stats

38:04

Spirals, Ellipticals, and Irregulars: Hubble’s Tuning Fork and Galaxy Classification Scheme

18:36

The Tolman Paradox in Spacetime Diagrams

03:16:12

Foundations of Observational Astronomy: The Moon, the Seasons, and Mapping the Sky

14:07

The Celestial Sphere

13:56

Constellations, Asterisms and Star Charts

03:46:14

Atoms and Light: The Nature of Light, Matter, and Quantum Mechanics

44:00

The Bohr Model of the Atom

17:10

Navigating the Night Sky

22:30

Atoms, Elements, and Isotopes

40:56

The Evolution of High Mass Stars