What is a Star?
... Proxima Centauri • The next closest star is 40 trillion km from the sun. (more than 260,000AU) • Light takes 4.2 years to reach Earth. ...
... Proxima Centauri • The next closest star is 40 trillion km from the sun. (more than 260,000AU) • Light takes 4.2 years to reach Earth. ...
LESSON 4, STARS
... becomes a protostar, a main-sequence star, a red giant, and finally, a white dwarf. A more-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a very massive star, a supergiant, a supernova, and finally, either a neutron star (pulsar) or a ...
... becomes a protostar, a main-sequence star, a red giant, and finally, a white dwarf. A more-massive star: begins as a nebula, becomes a protostar, a main-sequence star, a very massive star, a supergiant, a supernova, and finally, either a neutron star (pulsar) or a ...
October 2013
... and is typical of areas where new stars can form. Between the Scorpion and the Centaur are the Altar, the Level and the Wolf, while to the east of the Milky Way stretches a great expanse of sky with relatively few bright stars, dominated by birds and 'water constellations'. In the south these includ ...
... and is typical of areas where new stars can form. Between the Scorpion and the Centaur are the Altar, the Level and the Wolf, while to the east of the Milky Way stretches a great expanse of sky with relatively few bright stars, dominated by birds and 'water constellations'. In the south these includ ...
65008_StarFinderPart2
... What unique feature can be easily found in the Big Dipper, aka Ursa Major? In what other constellation might you find a double star? ...
... What unique feature can be easily found in the Big Dipper, aka Ursa Major? In what other constellation might you find a double star? ...
Chapter1&2Review
... 1. From what you know about astronomical units and light-years, how would you define a light-minute? 2. From what you know about astronomical units and light-years, how would you define a light-minute? 3. Describe the path that a star on the celestial equator follows from the time it rises until it ...
... 1. From what you know about astronomical units and light-years, how would you define a light-minute? 2. From what you know about astronomical units and light-years, how would you define a light-minute? 3. Describe the path that a star on the celestial equator follows from the time it rises until it ...
1.1 Stars in the Broader Context of Modern Astro
... • A relatively recent development in astronomy is the realisation that many (most) stars have their own planetary systems. At the time of writing, there are 1137 planetary systems and 1822 planets (467 multiple planet systems) known (http://exoplanet.eu/catalog.php). Nearly all of these have been fo ...
... • A relatively recent development in astronomy is the realisation that many (most) stars have their own planetary systems. At the time of writing, there are 1137 planetary systems and 1822 planets (467 multiple planet systems) known (http://exoplanet.eu/catalog.php). Nearly all of these have been fo ...
6. 1 Star Distances 6. 2 Apparent Brightness, Intrinsic Brightness
... diagram, typically 10 to 100 times the diameter of the sun. ...
... diagram, typically 10 to 100 times the diameter of the sun. ...
(HR) Diagrams
... “hotter” and an arrow pointing in the direction of increasing temperature. In addition, mark the horizontal axis end where the stars are colder with the label “colder” and an arrow pointing in the direction of lower temperature. 10. Draw the following zones on the HR diagram. To do so, draw a line a ...
... “hotter” and an arrow pointing in the direction of increasing temperature. In addition, mark the horizontal axis end where the stars are colder with the label “colder” and an arrow pointing in the direction of lower temperature. 10. Draw the following zones on the HR diagram. To do so, draw a line a ...
The Properties of Stars
... sequence and then moves off the sequence when it runs out of fuel. • How long it stays on the main sequence and where it moves to depends on size. ...
... sequence and then moves off the sequence when it runs out of fuel. • How long it stays on the main sequence and where it moves to depends on size. ...
Sample Exam Questions
... a) red supergiant b) black hole c) pulsar d) all pull equally 30. Which of the following exists almost exclusively in the halo of the Milky Way? a) globular star clusters b) open star clusters c) stellar associations d) cold gas and dust clouds 31. A galaxy that has just a little dust, but lots of r ...
... a) red supergiant b) black hole c) pulsar d) all pull equally 30. Which of the following exists almost exclusively in the halo of the Milky Way? a) globular star clusters b) open star clusters c) stellar associations d) cold gas and dust clouds 31. A galaxy that has just a little dust, but lots of r ...
The Milky Way - 清華大學物理系歡迎頁 Welcome to
... is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer three essential questions: • What happens as a star uses up its hydrogen? • What happens when a star exhausts its hydrogen? • What evidence do astronomers ha ...
... is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer three essential questions: • What happens as a star uses up its hydrogen? • What happens when a star exhausts its hydrogen? • What evidence do astronomers ha ...
Document
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: – Apparent Magnitude (m) – Spectral Type (O, B, A, F, G, K, M) – Luminosity Class (Main Sequence, Giant, etc…). These are ...
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: – Apparent Magnitude (m) – Spectral Type (O, B, A, F, G, K, M) – Luminosity Class (Main Sequence, Giant, etc…). These are ...
Wednesday, November 7, 2007
... Brown dwarfs begin life with gravitational contraction, just as stars do. But they just get smaller and dimmer until the contraction is halted by degeneracy pressure. So they are brightest and easiest to discover when young. Have been discovered mainly in star forming regions. Also sometimes found ...
... Brown dwarfs begin life with gravitational contraction, just as stars do. But they just get smaller and dimmer until the contraction is halted by degeneracy pressure. So they are brightest and easiest to discover when young. Have been discovered mainly in star forming regions. Also sometimes found ...
solar system
... The Great Nebula (M42) in the constellation Orion, 1,600 light-years from the earth, consists of bright and dark masses of gas and dust where stars are in the process of being born. e. Ronald Royer/Science Source/Photo Researchers, Inc.[1] [1]"Orion Nebula," Microsoft® Encarta® Encyclopedia 2000. © ...
... The Great Nebula (M42) in the constellation Orion, 1,600 light-years from the earth, consists of bright and dark masses of gas and dust where stars are in the process of being born. e. Ronald Royer/Science Source/Photo Researchers, Inc.[1] [1]"Orion Nebula," Microsoft® Encarta® Encyclopedia 2000. © ...
ASTRONOMY 130
... tip of the handle, this is Alkaid. Continue down the handle, the next star is Mizar. Look carefully at Mizar with the naked eye and then through one of the telescopes that are set on Mizar. Note your observations. The next star down the handle is Alioth. Alkaid and Alioth are almost of equal brightn ...
... tip of the handle, this is Alkaid. Continue down the handle, the next star is Mizar. Look carefully at Mizar with the naked eye and then through one of the telescopes that are set on Mizar. Note your observations. The next star down the handle is Alioth. Alkaid and Alioth are almost of equal brightn ...
Transcript_Forbidden Planets
... generate enough solar wind to blow away the atmosphere – and they would only last of few million years before going supernova, which would be insufficient time for the indigenous Tatooine life-forms to have evolved. So let’s run with the idea that Tatooine really does have two stars of approximately ...
... generate enough solar wind to blow away the atmosphere – and they would only last of few million years before going supernova, which would be insufficient time for the indigenous Tatooine life-forms to have evolved. So let’s run with the idea that Tatooine really does have two stars of approximately ...
Nights of the Heavenly G With
... sweeping to Aldebaran in the Bull, and then cutting back down to Orion's belt. You will have learned most of the winter stars, and traced out a giant letter "G" taking up nearly half the starry sky! Taking a closer look, let's begin with the "star of middle age," Capella. Even though various distanc ...
... sweeping to Aldebaran in the Bull, and then cutting back down to Orion's belt. You will have learned most of the winter stars, and traced out a giant letter "G" taking up nearly half the starry sky! Taking a closer look, let's begin with the "star of middle age," Capella. Even though various distanc ...
ppt document
... per cubic centimeter (in English about 30 billion trillion). Most solids and liquids have similar numbers. At the earth’s surface our atmosphere has about 2.4 x 1019 molecules per cubic centimeter (about a thousand times less dense than liquid water). In most of interstellar space, there is about 1 ...
... per cubic centimeter (in English about 30 billion trillion). Most solids and liquids have similar numbers. At the earth’s surface our atmosphere has about 2.4 x 1019 molecules per cubic centimeter (about a thousand times less dense than liquid water). In most of interstellar space, there is about 1 ...
Chapter13
... dwarfs are found in the lower left corner of the HertzsprungRussell diagram. The more massive a white dwarf, the smaller it is! ...
... dwarfs are found in the lower left corner of the HertzsprungRussell diagram. The more massive a white dwarf, the smaller it is! ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.