* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Stars - gilbertmath.com
Space Interferometry Mission wikipedia , lookup
Dyson sphere wikipedia , lookup
Aries (constellation) wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Canis Minor wikipedia , lookup
Corona Borealis wikipedia , lookup
Star of Bethlehem wikipedia , lookup
Auriga (constellation) wikipedia , lookup
Observational astronomy wikipedia , lookup
Corona Australis wikipedia , lookup
Constellation wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Cassiopeia (constellation) wikipedia , lookup
Perseus (constellation) wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Type II supernova wikipedia , lookup
Future of an expanding universe wikipedia , lookup
H II region wikipedia , lookup
Stellar classification wikipedia , lookup
Star catalogue wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Astronomical spectroscopy wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Stellar evolution wikipedia , lookup
Stars February 17, 2015 What's Going On? It's a... Bear? Life Cycle of a Star HR Diagram Learning Goal I will be able to describe the birth and life cycle of a star. 1 Stars February 17, 2015 Homework Check Show me all of the homework you have done this unit. Pg. 267 Pg. 277 Pg. 288 1, 8, 9, 12 1, 2, 9, 10, 11 2, 3, 6, 7, 8 2 Stars February 17, 2015 Term Table Time *Before we look them up, let's try and figure them out! Constellation Asterism Astonomical Phenomenon Protostar 3 Stars February 17, 2015 "Seeing" A Black Hole 4 Stars February 17, 2015 Burning Questions 1. What are stars made of? 2. What do stars look like up close? 3. What colour are stars? 4. If our star (the Sun) is 1.4 million km wide, a. what is the size of the smallest star? b. what is the size of the largest star? 5 Stars February 17, 2015 Burning Questions 1. What are stars made of? Dust and Gas dust and gas and plasma dust and gas and plasma and electricity 6 Stars February 17, 2015 Burning Questions 2. What do stars look like up close? Ball of plasma immensely bright fire ball they have lumps they have "solar flares"" 7 Stars February 17, 2015 Burning Questions 3. What colour are stars? every colour white many different many same all oragne and yellow colour depends on distance from our eye 8 Stars February 17, 2015 Burning Questions 4. If our star (the Sun) is 1.4 million km wide, a. what is the size of the smallest star? a speck 1000 km 1 km b. what is the size of the largest star? 100 000 000 000 000 km (100 trillion) Infinite 3 AU (350 million) 5 billion 9 Stars February 17, 2015 Star Types 10 Stars February 17, 2015 Star Sizes 11 Stars February 17, 2015 Milky Way Stars 12 Stars February 17, 2015 It's a ... Bear? You have probably noticed, when looking at the sky at night, that some stars look as though they are grouped ____________________ into a distinct _____________________. Perhaps the best known star pattern in the northern hemisphere is the _________ ________________. 13 Stars February 17, 2015 It's a ... Bear? The ______ ___________________ is actually just part of a larger star pattern known as ____________ ___________________, which is itself a _________________________. 14 Stars February 17, 2015 It's a ... Bear? A constellation is a group of stars that, from Earth, have a recognizable form. Some other constellations are: Saggitarius Ursa Major Cancer Ursa Minor Hercules 15 Stars February 17, 2015 It's a ... Bear? Though you may think that the Big Dipper is a astermism constellation, it is actually an _______________, a smaller star pattern within a constellation. Though star patters we see at night appear to be the same distance from Earth, they are actually not. When viewed from elsewhere these star patterns would not be visible. 16 Stars February 17, 2015 A Star is Born _________ stars form inside a collapsing ____________________, a cloud of dust and gases. This collapse can be triggered by the _________________________________ attraction of a nearby star or the shockwave from an __________________________ star. 17 Stars February 17, 2015 A Star is Born Inside a collapsing ________________, the region with the _________________ amount of matter will start to draw material towards it through ______________________. 18 Stars February 17, 2015 A Star is Born The material falling inward to the _________ has excess ________________ that causes the central ball of material to begin to ________________. Extremely high _________________ build up inside the ball, which in turn causes tightly packed ___________ to heat up. As the ____________________ climbs, the core begins to glow. This is called a __________________, a star in its __________ stage of formation. 19 Stars February 17, 2015 A Star is Born Eventually, the temperature of the spinning __________________ rises to ________________ of degrees Celsius. This is hot enough for ______________ reactions to start. Over tens of thousands of years, the ____________ from the core gradually reaches the star’s outside and the star “switches on” and begins to __________. 20 Stars February 17, 2015 The "Life Cycle" of a Star The term "Life Cycle" is often used to describe the path that the life of an organism takes from birth to death, and beyond. Can you think of any "Cycles" that you know? 21 Stars February 17, 2015 22 Stars February 17, 2015 23 Stars February 17, 2015 24 Stars February 17, 2015 The "Life Cycle" of a Star With a small group, try and map out the life cycle of a star. NO PEEKING! You did this last time. 25 Stars February 17, 2015 Your Star Cycles 26 Stars February 17, 2015 27 Stars February 17, 2015 28 Stars February 17, 2015 29 Stars February 17, 2015 30 Stars February 17, 2015 31 Stars February 17, 2015 32 Stars February 17, 2015 The "Life Cycle" of a Star The way in which a star evolves in its lifetime depends on the ________ it had when it originally formed. Stars fall into __________ general mass categories: low, medium and high. 33 Stars February 17, 2015 The "Life Cycle" of a Star Low Mass Stars 1. Use their ______________ much more ____________ than more massive stars 2. Can last for ______ ______________ years 3. With ________ gravity and __________ pressures than other stars, the ______________ reactions in the core happen at a relatively ________ rate 4. Shine ____________ as small red stars called ______ ____________ 5. The light of a ______ ____________ stars dim and gradually grows ____________ 6. As they burn out they ________________ under their own ______________ 7. ______ ____________ eventually cool into smaller __________ ____________ 34 Stars February 17, 2015 35 Stars February 17, 2015 The "Life Cycle" of a Star Medium Mass Stars 1. Burn their fuel ____________ than low mass stars 2. Use their ________________ up in about ____ ______________ years 3. Eventually, the star will ________________ under its own gravity 4. This process of ____________________ raises the ____________________ and ______________ inside the star, and the star actually __________________! 5. As the star reheats, it expands rapidly into a ______ __________ 6. Eventually, even the ____________ fuel burns out and the star collapses again and slowly burns out 36 Stars February 17, 2015 The "Life Cycle" of a Star High Mass Stars 1. More than _____ times the mass of the Sun 2. As ______________ pulls matter into the center of the star, the ______________ reactions accelerate making high mass stars ____________, ______________, and __________ than other stars 3. Always come to a ______________ end in less than ______ ______________ years 4. As the star collapses, it ______________into a ____________________ 5. When the ____________ fuel runs out the core __________________ again and continues to go through many cycles of ________________ and __________________ as new elements including ________ are formed in its core 37 Stars February 17, 2015 38 Stars February 17, 2015 Going Supernova Supernovas: The Violent End of High Mass Stars When ________ fuses, it does not release __________. If too much of the ________ of a high mass star is made up of ________, the star will “turn off” over a period of ________________ 39 Stars February 17, 2015 Going Supernova With no ________ left to produce heat energy, the star ________________ one final time, so fast and intensely that the ________ of the star heats up to many hundreds of millions of degrees and explodes into a _________________. 40 Stars February 17, 2015 Going Supernova The explosion releases enough ____________ to cause the ________ and other elements to fuse in various combinations. It is in this way that all of the ________________ of the ________________ __________ have been formed. As the elements are sent out into space, some of the debris and elements from the old star create new ______________ out of which new star and planet systems may form. 41 Stars February 17, 2015 Going Supernova The star’s remaining core after a supernova explosion will turn into either a ______________ star or a __________ ________ depending on the mass of the original star. 42 Stars February 17, 2015 Going Supernova 43 Stars February 17, 2015 44 Stars February 17, 2015 The Hertzsprung‐Russell Diagram 45 Stars February 17, 2015 The Hertzsprung‐Russell Diagram 46 Stars February 17, 2015 The Hertzsprung‐Russell Diagram 47 Stars February 17, 2015 The Hertzsprung‐Russell Diagram 48 Stars February 17, 2015 The Hertzsprung‐Russell Diagram 49 Stars February 17, 2015 The Hertzsprung‐Russell Diagram 50 Stars February 17, 2015 The Hertzsprung‐Russell Diagram 51 Stars February 17, 2015 Homework! Pg. 305 2 9, 11, 12 52 Attachments 1 Intro to Space 1 Contact Opening Scene.mp4 Intro to Space The Beginning of the Universe.mp4 1 Intro to Space 1 Celestial Objects.mp4 1 Intro to Space 2 How Many.mp4 1 Intro to Space 4 What Makes a Planet.mp4 1 Z Intro to Space How Many Universes.mp4 A Intro to Space 1 Contact Opening Scene.mp4 B1 Stars Star Size Comparison.mp4 B1 (Stars) Star Types.mp4 B1 (Stars) Massive Stars in the Milky Way.mp4 B1 (Stars) Tracking Stars Orbiting the Milky Way's Central Black Hole.mp4