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AST101- Lecture 11 Light as a Particle Atoms: Nucleus: positively charged protons o Very small Made up of neutral neurons Negative electrons are orbiting around the outside 99% of a...
AST101- Lecture 10 Light The PP (Proton-Proton) Chain The chances of 4 protons colliding simultaneously very slim Therefore, it has to happen in stages, known as the PP chain This chain involves slowl...
AST101 Lecture 9 The Sun The Suns Overall Structure: The Core: o Never visible o 25% of the Suns radius o 50% of the Suns mass o Nuclear reactions are occurring ...
AST101 Lecture 8 Tides Newtons Universal Law of Gravity: Something must be applying force to make the direction of planets change Angular momentum is conserved and the same everywhere in the orbit If the distance between t...
AST101 Lecture 7 Newtons Laws Isaac Newton: Coinvented calculus Presented the idea of what a force is, and the laws of motion Described the law of gravity Driven by religious considerations o Felt that the laws of nature s...
AST101 Lecture 6 History of Astronomy Astronomy Before Copernicus: (1000 years ago) People observed the following: o The stars, sun and moon rise and set everything o The earth does not f...
AST101 Lecture 3 The Solar System Solar System: a solar system consists of a star orbited by planets, moons, and lots of debris (comets, asteroids, dust) PowerPoint, Slide #5 o The Solar System refers to our solar...
AST 101 Lecture 8 The Sun: the nearest star! Basic Properties of the Sun o The Sun has a diameter of 1,392, 000 kilometers (that is 109 times the diameter of the Earth. o The mass of the Sun: 1.989 x 10^30 kg Solar System ...
AST 101 Lecture 8 - Tides Newtons Law of Motion 1. An object in motion stays in motion until an outside force acts upon on it. 2. Acceleration is proportional to force and inversely proportional to mass. ...
Tuesday, October 2, 2018 ASTRO101 Lecture Notes Newtons Laws of Motion First Law: A object in motion remains in motion unless acted upon by an outside force. Second Law: Acceleration is proportional to force and inversel...
AST101 Lecture 7 - Newtons Law Recall: Johannes Kepler and his discoveries: Keplers 1 Law: Planet orbit the sun in an elliptical pattern, with the Sun at one focus. Nothing lies at the other focus, and the Sun is not rig...
Sept. 2518 AST101 Lecture 6: Astronomy before Copernicus Observations Stars, sun, moon rise and set every day Earth does not feel like its moving Stars dont seem to change Things fall to Earth Assumptions Heavens are perfe...
Sept. 1318 AST 101 Lecture 3: Solar System Inner Solar System Mercury, Venus, Earth and Mars Outer Solar System Jupiter, Saturn, Uranus, Neptune, many dwarf planets comets Terrestrial Planets Earthlike Small Rocky littl...
Sept. 1118 AST101 Lecture 2 1 AU (astronomical unit) = average distance between earth and the sun 1 LY (light year) = distance light travels in one year, about 63,000 AU Stars are balls of plasma that produce energy by nuc...
Oct. 218 AST 101 Lecture 8 Newtons Laws of Motion 1st Law: object in motion remains unless acted upon by outside force 2nd Law: acceleration is proportional to force and inversely proportional to mass A=fm 3rd Law: for eve...
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