• 2388 views

    Lec 60 - Detectable Civilizations in our Galaxy 2

    Detectable Civilizations in our Galaxy 2 Why do we even care about the Drake Equation. Thinking about the fraction of a planet's life when a civilization might be detectable.

    Video is embedded from external source so embedding is not available.

    Video is embedded from external source so download is not available.

    Here is the next lecture for this course

    Watch NEXT
    LECTURE
    2553 views

    Lec 61 - Detectable Civilizations in our Galaxy 3

     07:18
    Lecture List | Course Details | Contents | Related

    No content is added to this lecture.

    Go to course:

    This video is a part of a lecture series from of khan

    Lecture list for this course

    Lec 1 - Scale of Earth and Sun

    Lec 2 - Scale of Solar System

    Lec 3 - Scale of Distance to Closest Stars

    Lec 4 - Scale of the Galaxy

    Lec 5 - Intergalactic Scale

    Lec 6 - Hubble Image of Galaxies

    Lec 7 - Big Bang Introduction

    Lec 8 - Radius of Observable Universe

    Lec 9 - (Correction) Radius of Observable Universe

    Lec 10 - Red Shift

    Lec 11 - Cosmic Background Radiation

    Lec 12 - Cosmic Background Radiation 2

    Lec 13 - Cosmological Time Scale 1

    Lec 14 - Cosmological Time Scale 2

    Lec 15 - Four Fundamental Forces

    Lec 16 - Birth of Stars

    Lec 17 - Becoming a Red Giant

    Lec 18 - White and Black Dwarfs

    Lec 19 - A Universe Smaller than the Observable

    Lec 20 - Star Field and Nebula Images

    Lec 21 - Parallax in Observing Stars

    Lec 22 - Stellar Parallax

    Lec 23 - Stellar Distance Using Parallax

    Lec 24 - Stellar Parallax Clarification

    Lec 25 - Parsec Definition

    Lec 26 - Hubble's Law

    Lec 27 - Lifecycle of Massive Stars

    Lec 28 - Supernova (Supernovae)

    Lec 29 - Supernova clarification

    Lec 30 - Black Holes

    Lec 31 - Cepheid Variables 1

    Lec 32 - Why Cepheids Pulsate

    Lec 33 - Why Gravity Gets So Strong Near Dense Objects

    Lec 34 - Supermassive Black Holes

    Lec 35 - Quasars

    Lec 36 - Quasar Correction

    Lec 37 - Galactic Collisions

    Lec 38 - Earth Formation

    Lec 39 - Beginnings of Life

    Lec 40 - Ozone Layer and Eukaryotes Show Up in the Proterozoic Eon

    Lec 41 - Biodiversity Flourishes in Phanerozoic Eon

    Lec 42 - First living things on land clarification

    Lec 43 - Plate Tectonics-- Difference between crust and lithosphere

    Lec 44 - Structure of the Earth

    Lec 45 - Plate Tectonics -- Evidence of plate movement

    Lec 46 - Plate Tectonics -- Geological Features of Divergent Plate Boundaries

    Lec 47 - cPlate Tectonics-- Geological features of Convergent Plate Boundaries

    Lec 48 - Plates Moving Due to Convection in Mantle

    Lec 49 v- Hawaiian Islands Formation

    Lec 50 - Compositional and Mechanical Layers of the Earth

    Lec 51 - Seismic Waves

    Lec 52 - Why S-Waves Only Travel in Solids

    Lec 53 - Refraction of Seismic Waves

    Lec 54 - The Mohorovicic Seismic Discontinuity

    Lec 55 - How we know about the Earth's core

    Lec 56 - Pangaea

    Lec 57 - Scale of the Large

    Lec 58 - cScale of the Small

    Lec 59 - Detectable Civilizations in our Galaxy 1

    Lec 61 - Detectable Civilizations in our Galaxy 3

    Lec 62 - Detectable Civilizations in our Galaxy 4

    Lec 63 - Detectable Civilizations in our Galaxy 5

    Lec 64 - Human Evolution Overview

    Lec 65 - Understanding Calendar Notation

    Lec 66 - Correction Calendar Notation

    Lec 67 - Development of Agriculture and Writing

    Lec 68 - Introduction to Light

    Lec 69 - Seasons Aren't Dictated by Closeness to Sun

    Lec 70 - How Earth's Tilt Causes Seasons

    Lec 71 - Milankovitch Cycles Precession and Obliquity

    Lec 72 - Are Southern Hemisphere Seasons More Severe?

    Lec 73 - Precession Causing Perihelion to Happen Later

    Lec 74 - What Causes Precession and Other Orbital Changes

    Lec 75 - Apsidal Precession (Perihelion Precession) and Milankovitch Cycles

    Lec 76 - Firestick Farming

    Lec 77 - Carbon 14 Dating 1

    Lec 78 - Carbon 14 Dating 2

    Lec 79 - Potassium-Argon (K-Ar) Dating

    Lec 80 - K-Ar Dating Calculation

    Lec 81 - Chronometric Revolution

    Lec 82 - Collective Learning

    Lec 83 - Land Productivity Limiting Human Population

    Lec 84 - Energy Inputs for Tilling a Hectare of Land

    Lec 85 - Random Predictions for 2060