Chapter 5 Galaxies and Star Systems
... theses spiral arms. Relatively few new stars form in the central bulge. Some spiral galaxies, called barred-spiral galaxies, have a huge bar-shaped region of stars and gas that passes through their center. Not all galaxies have spiral arms. Elliptical galaxies look like round or flattened balls. The ...
... theses spiral arms. Relatively few new stars form in the central bulge. Some spiral galaxies, called barred-spiral galaxies, have a huge bar-shaped region of stars and gas that passes through their center. Not all galaxies have spiral arms. Elliptical galaxies look like round or flattened balls. The ...
planetary nebulae
... Images by Michael Cripps, Neatherd High School Students, ESA and NASA Project sponsored by the UK Particle Physics and Astronomy Research Council, the European Space Agency and Norfolk Education Business Exchange Technical assistance by the scientists, engineers and educationalists of the European S ...
... Images by Michael Cripps, Neatherd High School Students, ESA and NASA Project sponsored by the UK Particle Physics and Astronomy Research Council, the European Space Agency and Norfolk Education Business Exchange Technical assistance by the scientists, engineers and educationalists of the European S ...
Flying Laptop Academic Small Satellite Flying
... encoded in standard protocols according to the Consultative Committee for Space Data Systems (CCSDS). The ground segment uses ESA standard SCOS-2000 software to operate the satellite. The Flying Laptop is three-axis stabilised with a total pointing error during one pass of less than 150 arcsec and a ...
... encoded in standard protocols according to the Consultative Committee for Space Data Systems (CCSDS). The ground segment uses ESA standard SCOS-2000 software to operate the satellite. The Flying Laptop is three-axis stabilised with a total pointing error during one pass of less than 150 arcsec and a ...
Slide 1
... Dn – σ Correlation (Dressler et al. 87) Dn = diameter within which mean SB is In = 20.75 μB This essentially replaces Ie and Re with one parameter Dn/Re is larger for galaxies of high SB than low SB but with same L Dn ~ σ1.4 Ie0.07 ...
... Dn – σ Correlation (Dressler et al. 87) Dn = diameter within which mean SB is In = 20.75 μB This essentially replaces Ie and Re with one parameter Dn/Re is larger for galaxies of high SB than low SB but with same L Dn ~ σ1.4 Ie0.07 ...
An Overview of the Gaia
... • Chemical abundances for several elements down to V~1213 (few 106 stars) • Extinction (DIB at 862.0 nm) down to V~13 (e.g. Munari et al. 2008) • ~ 40 transits will identify a large number of new spectroscopic binaries with periods < 15 yr (CU4, CU6, CU8) ...
... • Chemical abundances for several elements down to V~1213 (few 106 stars) • Extinction (DIB at 862.0 nm) down to V~13 (e.g. Munari et al. 2008) • ~ 40 transits will identify a large number of new spectroscopic binaries with periods < 15 yr (CU4, CU6, CU8) ...
Chapter 28 Stars and Their Characteristics
... • The smaller a star is the longer it will live. – Larger stars have more fuel, but they have to burn (fuse) it faster in order to maintain equilibrium. – Because fusion occurs at a faster rate in massive stars, large stars use all their fuel in a shorter length of time. – So…A smaller star has less ...
... • The smaller a star is the longer it will live. – Larger stars have more fuel, but they have to burn (fuse) it faster in order to maintain equilibrium. – Because fusion occurs at a faster rate in massive stars, large stars use all their fuel in a shorter length of time. – So…A smaller star has less ...
Lesson Plans - Houston ISD
... Ⓡ _SCI.8.8A Describe components of the universe including stars, nebulae and galaxies, and use models such as the Herztsprung-Russell diagram for classification. Ⓢ _SCI.8.8B Recognize that the Sun is a medium-sized star near the edge of a disc-shaped galaxy of stars and that the Sun is many thousand ...
... Ⓡ _SCI.8.8A Describe components of the universe including stars, nebulae and galaxies, and use models such as the Herztsprung-Russell diagram for classification. Ⓢ _SCI.8.8B Recognize that the Sun is a medium-sized star near the edge of a disc-shaped galaxy of stars and that the Sun is many thousand ...
Determination of spiral orbits with constant tangential velocity
... In the animation, the velocity distribution is shown with red lines as a function of the radius. The lines are interrupted by green pixels. The lower part of the lines corresponds to the tangential component of the velocity, and the entire line equals the total rate which is composed of tangential a ...
... In the animation, the velocity distribution is shown with red lines as a function of the radius. The lines are interrupted by green pixels. The lower part of the lines corresponds to the tangential component of the velocity, and the entire line equals the total rate which is composed of tangential a ...
Star Groups and Big Bang Power Point
... animals, such as Ursa Major (the great bear) or ancient gods or legendary heroes, such as Hercules or Orion. ...
... animals, such as Ursa Major (the great bear) or ancient gods or legendary heroes, such as Hercules or Orion. ...
Stars, Galaxies and the Universe FORM A
... how would the gravitational pull on the Earth by the Sun change? (a) it would be ¼ as strong at 0.5 AU (b) it would be 4x as strong at 0.5 AU (c) it would be ½ as strong at 0.5 AU (d) it would be 2x as strong at 0.5 AU (e) it would not change – gravitational force is not dependant on distance 41. Wh ...
... how would the gravitational pull on the Earth by the Sun change? (a) it would be ¼ as strong at 0.5 AU (b) it would be 4x as strong at 0.5 AU (c) it would be ½ as strong at 0.5 AU (d) it would be 2x as strong at 0.5 AU (e) it would not change – gravitational force is not dependant on distance 41. Wh ...
Understanding Planetary Motion
... a straight line, however, due to the motion of a planet it appears as if starlight bends into a planet. This makes it seem as if the light is originating from a different location. – This is similar to driving in the snow. The snow may actually be falling straight down but as we drive we “crash into ...
... a straight line, however, due to the motion of a planet it appears as if starlight bends into a planet. This makes it seem as if the light is originating from a different location. – This is similar to driving in the snow. The snow may actually be falling straight down but as we drive we “crash into ...
How to use custom background????
... – Classical: astronomers use simple geometry to try to explain what they see. – Renaissance: the boom of observational ...
... – Classical: astronomers use simple geometry to try to explain what they see. – Renaissance: the boom of observational ...
Main Sequence Stars
... • The Height-Weight diagram was for one person who we followed over their entire life. • How could we study the height-weight evolution of people if we had to acquire all of the data from people living right now (no questions about the past)? • We could fill in a single HW diagram using lots of dif ...
... • The Height-Weight diagram was for one person who we followed over their entire life. • How could we study the height-weight evolution of people if we had to acquire all of the data from people living right now (no questions about the past)? • We could fill in a single HW diagram using lots of dif ...
PPT 15MB - HubbleSOURCE
... emission, from compact globules to long, stringy filaments Over one million stars detected in the survey, but region is so crowded that there are many more that we can’t detect Dark, obscuring clouds seen at many scales Star-forming regions imaged at GC distance and in spiral arms along the li ...
... emission, from compact globules to long, stringy filaments Over one million stars detected in the survey, but region is so crowded that there are many more that we can’t detect Dark, obscuring clouds seen at many scales Star-forming regions imaged at GC distance and in spiral arms along the li ...
Eratosthenes - Allendale School
... Eratosthenes was an ancient Greek writer, geographer, music theorist, mathematician, astronomer, poet, teacher, and librarian. (Quite an overachiever, huh? In fact, he was considered to be the inventor of geography!) Since Eratosthenes was involved in so many different fields, his critics claimed he ...
... Eratosthenes was an ancient Greek writer, geographer, music theorist, mathematician, astronomer, poet, teacher, and librarian. (Quite an overachiever, huh? In fact, he was considered to be the inventor of geography!) Since Eratosthenes was involved in so many different fields, his critics claimed he ...
Life Cycle of Stars
... The term „double star“ is used for binary star systems, but also for stars that optically just appear close to each other. Binary star systems are very important references for astronomers: Their orbits allow to determine their masses, which again allows to calculate radius and density. Resulting ma ...
... The term „double star“ is used for binary star systems, but also for stars that optically just appear close to each other. Binary star systems are very important references for astronomers: Their orbits allow to determine their masses, which again allows to calculate radius and density. Resulting ma ...
Lecture 7
... on matter in the Universe, much as stars form from clumps of gas within galaxies. We will see computer simulations of this later. 5) The density of neighbors around a galaxy is called its environment. These range from very sparse (as in the Local Group) to very dense in big clusters. Hubble types va ...
... on matter in the Universe, much as stars form from clumps of gas within galaxies. We will see computer simulations of this later. 5) The density of neighbors around a galaxy is called its environment. These range from very sparse (as in the Local Group) to very dense in big clusters. Hubble types va ...
Learning About Stars
... Earth rotates on its axis. Part of the Earth faces the sun, while the other part of Earth is in shadow. Earth’s rotation is why we have night and day. http://starchild.gsfc.nasa.gov/Images/StarChild/questions/dayandnight.gif ...
... Earth rotates on its axis. Part of the Earth faces the sun, while the other part of Earth is in shadow. Earth’s rotation is why we have night and day. http://starchild.gsfc.nasa.gov/Images/StarChild/questions/dayandnight.gif ...
A Unique Environmental Studies Program
... you look at Alpha Centauri through a telescope you will find that is actually is two stars (a binary star), and they revolve around each other once every 80,000 years. Alpha Centauri is particularly interesting to astronomers because it is the nearest star visible to the naked eye, being 'only' 4.3 ...
... you look at Alpha Centauri through a telescope you will find that is actually is two stars (a binary star), and they revolve around each other once every 80,000 years. Alpha Centauri is particularly interesting to astronomers because it is the nearest star visible to the naked eye, being 'only' 4.3 ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.