observing the universe
... A galaxy is an assembly of between a billion (109) and a hundred billion (1011) stars. There is often a large amount of dust and gas intermingled, all held together by gravity. The Sun and Earth are in the Milky Way Galaxy. Galaxies have many different characteristics, but the easiest way to classif ...
... A galaxy is an assembly of between a billion (109) and a hundred billion (1011) stars. There is often a large amount of dust and gas intermingled, all held together by gravity. The Sun and Earth are in the Milky Way Galaxy. Galaxies have many different characteristics, but the easiest way to classif ...
Stars
... usually done on spectral lines. • Essentially all of the mass measurements that we have for stars are for stars in binary systems – two stars orbiting each other. • The mass of the stars can be measured from their velocities and the distance between the stars. ...
... usually done on spectral lines. • Essentially all of the mass measurements that we have for stars are for stars in binary systems – two stars orbiting each other. • The mass of the stars can be measured from their velocities and the distance between the stars. ...
Astrophysics E1. This question is about stars.
... M10/4/PHYSI/SP3/ENG/TZ2/XX Option E — Astrophysics E1. This question is about the relative population density of stars and galaxies. The number of stars around the Sun, within a distance of 17 ly, is 75. The number of galaxies in the local group, within a distance of 4.0 x 106 ly from the Sun, is 26 ...
... M10/4/PHYSI/SP3/ENG/TZ2/XX Option E — Astrophysics E1. This question is about the relative population density of stars and galaxies. The number of stars around the Sun, within a distance of 17 ly, is 75. The number of galaxies in the local group, within a distance of 4.0 x 106 ly from the Sun, is 26 ...
Measuring the Properties of Stars (ch. 17)
... The only method for directly determining the masses of stars is from binary stars, using Newton’s form of Kepler’s 3rd law. There are three types of binary stars, which depend on how close they are to each other, their relative brightnesses, the distance of the binary, and other factors: a.Visual bi ...
... The only method for directly determining the masses of stars is from binary stars, using Newton’s form of Kepler’s 3rd law. There are three types of binary stars, which depend on how close they are to each other, their relative brightnesses, the distance of the binary, and other factors: a.Visual bi ...
Lecture 15 (pdf from the powerpoint)
... Three thousand light-years away, a dying star throws off shells of glowing gas. This image from the Hubble Space Telescope reveals The Cat's Eye Nebula to be one of the most complex planetary nebulae known. In fact, the features seen in the Cat's Eye are so complex that astronomers suspect the brigh ...
... Three thousand light-years away, a dying star throws off shells of glowing gas. This image from the Hubble Space Telescope reveals The Cat's Eye Nebula to be one of the most complex planetary nebulae known. In fact, the features seen in the Cat's Eye are so complex that astronomers suspect the brigh ...
Define the following terms in the space provided
... D) Northwest, in the direction towards the U.S.A. E) The SCP cannot be seen from this location. 2) During Spring Break you and your friends plan to travel south to Cancun, Mexico for a week of sun and fun. You arrive in Cancun on a clear night. You look up at the stars and notice that they appear di ...
... D) Northwest, in the direction towards the U.S.A. E) The SCP cannot be seen from this location. 2) During Spring Break you and your friends plan to travel south to Cancun, Mexico for a week of sun and fun. You arrive in Cancun on a clear night. You look up at the stars and notice that they appear di ...
January 2006
... • Light elements (hydrogen, helium) formed in Big Bang • Heavier elements formed by nuclear fusion in stars and thrown into space by supernovae – Condense into new stars and planets – Elements heavier than iron form during supernovae explosions ...
... • Light elements (hydrogen, helium) formed in Big Bang • Heavier elements formed by nuclear fusion in stars and thrown into space by supernovae – Condense into new stars and planets – Elements heavier than iron form during supernovae explosions ...
How Big is the Universe
... the sky than are visible to the naked eye. Later, astronomers learned they were part of the Milky Way Galaxy. They also observed many fuzzy, cloudy looking patches. They were called nebulae. This is the Latin word for clouds. Some of them appeared to be giant clouds of gas and dust inside the Milky ...
... the sky than are visible to the naked eye. Later, astronomers learned they were part of the Milky Way Galaxy. They also observed many fuzzy, cloudy looking patches. They were called nebulae. This is the Latin word for clouds. Some of them appeared to be giant clouds of gas and dust inside the Milky ...
Chapter 13
... 1. The observed dark areas in the sky are caused by giant clouds of interstellar dust that block light from stars behind them. 2. In the 1930s, astronomers became aware that grains of dust exist throughout space. Interstellar cirrus clouds are faint, diffuse dust clouds found throughout interstellar ...
... 1. The observed dark areas in the sky are caused by giant clouds of interstellar dust that block light from stars behind them. 2. In the 1930s, astronomers became aware that grains of dust exist throughout space. Interstellar cirrus clouds are faint, diffuse dust clouds found throughout interstellar ...
Lecture 13, PPT version
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
Unit 3: Understanding the Universe
... Enduring Understandings The solar system contains planets, dwarf planets, comets, asteroids, and other small solar system bodies. ...
... Enduring Understandings The solar system contains planets, dwarf planets, comets, asteroids, and other small solar system bodies. ...
Today`s Powerpoint
... Measuring the Stars How big are stars? How far away are they? How bright are they? How hot? How old, and how long do they live? What is their chemical composition? How are they moving? Are they isolated or in clusters? By answering these questions, we not only learn about stars, but about the struc ...
... Measuring the Stars How big are stars? How far away are they? How bright are they? How hot? How old, and how long do they live? What is their chemical composition? How are they moving? Are they isolated or in clusters? By answering these questions, we not only learn about stars, but about the struc ...
Foundation 1 - Discovering Astronomy
... When core hydrogen fusion ceases, a main-sequence star becomes a giant • When hydrogen fusion ceases in the core, the star will collapse inward – this causes the layer just outside the core to become so hot and dense that hydrogen fusion will begin in this outer layer. • The energy produced by hydr ...
... When core hydrogen fusion ceases, a main-sequence star becomes a giant • When hydrogen fusion ceases in the core, the star will collapse inward – this causes the layer just outside the core to become so hot and dense that hydrogen fusion will begin in this outer layer. • The energy produced by hydr ...
Super Giant
... fighting in a large unstable star. However, gravity eventually wins and a star collapses inward on itself in a supernova! Explain how when we are looking up at the night sky, we are in fact looking back in time? Because of the hugeness of space, it takes millions of years for the light given- off by ...
... fighting in a large unstable star. However, gravity eventually wins and a star collapses inward on itself in a supernova! Explain how when we are looking up at the night sky, we are in fact looking back in time? Because of the hugeness of space, it takes millions of years for the light given- off by ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.