Class Notes for AST201H1 at University of Toronto St. George (UTSG)

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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 23: Main Sequence, Cosmic Distance Ladder, Edwin Hubble

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30 Mar 2019
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The stars all have the same age and the stars are all at around the same distance. They are all at around the same distance. Step 1: use radar to deter
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 24: Graph Paper, Nucleosynthesis, Neutrino

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30 Mar 2019
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 22: Elliptical Galaxy, Disc Galaxy, Cosmic Distance Ladder

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21 Mar 2019
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Irregular galaxies are a result of a collision of two galaxies (mergers. ) When its finish its star bursts, it will probably another disk galaxy. But i
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 19: Light Pollution

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18 Mar 2019
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 20: Semi-Major And Semi-Minor Axes, Orbital Period, Vera Rubin

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17 Mar 2019
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Johannes kepler: had worked from tycho bache"s data and came up with an accurate description of the motion of the planets. #1: planets orbit the sun in
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 18: Angular Momentum, Degenerate Matter, Tablespoon

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10 Mar 2019
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Topic: the afterlives of massive stars, neutron stars. The finale stage of a massive star"s life. When there is no more core fusion then gravity starts
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture 4: AST201 - lecture 4

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20 Jan 2019
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Objects will move with a constant speed and direction unless acted on by an external. You feel gravity every day, every other force you feel (wind, pus
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture 2: LIGHT

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19 Jan 2019
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How can you tell if a train has moved: you can be looking out the window, seeing if the landscape moves. If there are no windows, you can hear the trai
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture 3: Relativity part 2

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15 Jan 2019
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Time dilation: when someone is moving relative to you, their clock will seem to be running slower. Not only does time slow down, but also length. Thing
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 1: Vera Rubin, Spiral Galaxy, Orbital Speed

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19 Jan 2019
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One patch of the night sky can have numerous galaxies. If you are looking at things in the sky, it actually means you are looking back in time, as ligh
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 7: Cygnus X-1, Photon, Astronomical Object

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30 Jan 2019
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The black hole in the centre of our galaxy is actually much larger than cygnus x-1. Some elements tend to escape being devoured by black holes, and the
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 5: Gravitational Lens, Strong Gravity, Equivalence Principle

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25 Jan 2019
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Equivalence principle: no experiment can distinguish a difference between gravity pulling things back to the surface of earth and acceleration. We feel
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture 12: AST 201 - lecture 12

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16 Feb 2019
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Rule #1 = hotter is brighter if it is the same size. If a star is bluer than it is hotter, if it is redder than it is cooler. In our story, we have com
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 9: Stellar Parallax, Inverse-Square Law

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5 Feb 2019
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We have information about our sun, mostly because we have sent probes to measure things or observe the sun. However, we have information about distant
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 6: Cygnus X-1, Event Horizon, Escape Velocity

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29 Jan 2019
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If you shrank the size of earth while keeping its mass the same means that the escape speed goes up. If you keep crushing the earth smaller and smaller
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture 8: AST 201 LECTURE 8

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1 Feb 2019
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A star with a spectrum in the middle (close to where the green light area is) appear white. That is why there is no green stars in the sky. Historicall
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture Notes - Lecture 16: Neon Neon, Nucleon, Solar Mass

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1 Mar 2019
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Talking about what happens to a star that is above 8 solar masses, and the difference between a low-mass star and high mass star. When all the helium i
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UTSGAST201H1Bryan Gaensler, C. Barth Netterfield, Ilana MacDonaldWinter

AST201H1 Lecture 11: AST 201 - lecture 11

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16 Feb 2019
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In the previous lecture we discussed how to find certain properties of stars without having to go send probes to the stars. We can find the chemical co
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