ESA-ESO Working Group on the Galaxy
... •Need to follow stream across large area on the sky -> Wide-field, accurate RV, faint magnitudes, multiplex ~ 100 ...
... •Need to follow stream across large area on the sky -> Wide-field, accurate RV, faint magnitudes, multiplex ~ 100 ...
Life Cycle of a Star
... • Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores. • These stars can range from about a tenth of the mass of the sun to up to 200 times as massive. ...
... • Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores. • These stars can range from about a tenth of the mass of the sun to up to 200 times as massive. ...
GAIA Composition, Formation and Evolution of our Galaxy
... – initial mass and luminosity functions in star forming regions – luminosity function for pre main-sequence stars – detection and dating of the oldest (disk and halo) white dwarfs ...
... – initial mass and luminosity functions in star forming regions – luminosity function for pre main-sequence stars – detection and dating of the oldest (disk and halo) white dwarfs ...
Brock physics - Brock University
... (c) at about the same speed as stars. (d) [Compression waves in the Milky Way’s spiral arms don’t move.] 50. The average distance between stars in the Milky Way is about (a) * a few light years. (b) a few hundred light years. (c) a few thousand light years. (d) a few million light years. ...
... (c) at about the same speed as stars. (d) [Compression waves in the Milky Way’s spiral arms don’t move.] 50. The average distance between stars in the Milky Way is about (a) * a few light years. (b) a few hundred light years. (c) a few thousand light years. (d) a few million light years. ...
Lecture 31 - 2 The Death of Stars: Stellar Recycling Phase 3 -
... to these radii are completely vaporized while planets further out are vaporized except for rocky cores. • despite higher luminosity, the much larger surface area actually results in a decreased surface temperature for the giant star (i.e. it becomes redder than it was when it was on the main sequenc ...
... to these radii are completely vaporized while planets further out are vaporized except for rocky cores. • despite higher luminosity, the much larger surface area actually results in a decreased surface temperature for the giant star (i.e. it becomes redder than it was when it was on the main sequenc ...
GEARS Workshop Monday - Georgia Southern University
... The Chandra data shows bright X-ray sources in this field, most of which are young stars. In this image, red, green, and blue represent low, medium, and high energy X-rays. The Chandra data have been overlaid on the Hubble Space Telescope image to show the context of these X-ray data. Very few X-ray ...
... The Chandra data shows bright X-ray sources in this field, most of which are young stars. In this image, red, green, and blue represent low, medium, and high energy X-rays. The Chandra data have been overlaid on the Hubble Space Telescope image to show the context of these X-ray data. Very few X-ray ...
TYPES OF STARS
... When astronomers look through their telescopes, they see billions of stars. How do they make sense of all these stars? The goal of this problem set is for you to understand that astronomers classify stars on the basis of two different criteria: (1) the intensity of one of the H absorption lines (cal ...
... When astronomers look through their telescopes, they see billions of stars. How do they make sense of all these stars? The goal of this problem set is for you to understand that astronomers classify stars on the basis of two different criteria: (1) the intensity of one of the H absorption lines (cal ...
Educator Guide: Starlab (Grades 6-8)
... and its outer layers cool and take on a reddish hue. Red Supergiant – an especially large red giant star. Red supergiant stars can have dimeters greater than 500 times that of the Sun. Betelgeuse in the constellation Orion and Antares in Scorpius are red supergiant stars. Rotation – spinning on a ...
... and its outer layers cool and take on a reddish hue. Red Supergiant – an especially large red giant star. Red supergiant stars can have dimeters greater than 500 times that of the Sun. Betelgeuse in the constellation Orion and Antares in Scorpius are red supergiant stars. Rotation – spinning on a ...
HR Diagram and Stellar Fusion
... • …Ejnar Hertzsprung and H. N. Russell, graph (see illustration) showing the luminosity of a star as a function of its surface temperature. The luminosity, or absolute magnitude, increases upwards on the vertical axis; the temperature (or some temperature-dependent characteristic such as spectral cl ...
... • …Ejnar Hertzsprung and H. N. Russell, graph (see illustration) showing the luminosity of a star as a function of its surface temperature. The luminosity, or absolute magnitude, increases upwards on the vertical axis; the temperature (or some temperature-dependent characteristic such as spectral cl ...
Ch. 26.5 - (www.ramsey.k12.nj.us).
... •What is the big bang theory & what evidence supports it? •How can dark matter be detected? ...
... •What is the big bang theory & what evidence supports it? •How can dark matter be detected? ...
(HR) Diagrams
... and what are their names? b. Write down the spectral class of the sub-type halfway between K and M. 6. Which is the hottest type of star, O, B, A, F, G, K or M? Circle the hottest type. 7. Which is the coldest type of star, O, B, A, F, G, K or M? Circle the coldest type. 8. Which is hotter, a G2 sta ...
... and what are their names? b. Write down the spectral class of the sub-type halfway between K and M. 6. Which is the hottest type of star, O, B, A, F, G, K or M? Circle the hottest type. 7. Which is the coldest type of star, O, B, A, F, G, K or M? Circle the coldest type. 8. Which is hotter, a G2 sta ...
Astronomy PPT
... the North Star, which is almost directly above the Earth’s North Pole. Because of Earth’s rotation, all of the stars appear to make one complete circle around ...
... the North Star, which is almost directly above the Earth’s North Pole. Because of Earth’s rotation, all of the stars appear to make one complete circle around ...
Astronomers classify stars according to their physical characteristics
... •Scientists study the star’s _black_ _line _ _spectrum__ to determine what it is made of. Stars vary in their composition, but most are made of _hydrogen___, _helium___, and a small amount of _other_ _elements__. ...
... •Scientists study the star’s _black_ _line _ _spectrum__ to determine what it is made of. Stars vary in their composition, but most are made of _hydrogen___, _helium___, and a small amount of _other_ _elements__. ...
Stellar Masses
... magnitudes for various objects-Supernovae, Cepheids etc- but they are only average magnitudes.Each varies from the mean.As we move to greater distances it will be easier to detect only those at the high end of the distribution i.e.the brightest. This obviously leads to errors and results in what is ...
... magnitudes for various objects-Supernovae, Cepheids etc- but they are only average magnitudes.Each varies from the mean.As we move to greater distances it will be easier to detect only those at the high end of the distribution i.e.the brightest. This obviously leads to errors and results in what is ...
The Life Cycle of a Star
... the Red Giant has fused all of the helium into carbon, the forces acting on the star are again unbalanced. The massive outer layers of the star again rush into the core and rebound, generating staggering amounts of energy. ...
... the Red Giant has fused all of the helium into carbon, the forces acting on the star are again unbalanced. The massive outer layers of the star again rush into the core and rebound, generating staggering amounts of energy. ...
The Night Sky May 2016 - Bridgend Astronomical Society
... Virgo, rising in the east in late evening this month, is not one of the most prominent constellations, containing only one bright star, Spica, but is one of the largest and is very rewarding for those with "rich field" telescopes capable of seeing the many galaxies that lie within its boundaries. Sp ...
... Virgo, rising in the east in late evening this month, is not one of the most prominent constellations, containing only one bright star, Spica, but is one of the largest and is very rewarding for those with "rich field" telescopes capable of seeing the many galaxies that lie within its boundaries. Sp ...
Star Jeopardy "Review #1
... They are young enough to not have most of their hydrogen not fused into helium. ...
... They are young enough to not have most of their hydrogen not fused into helium. ...
Space Study Guide
... background radiation (CBR). This radiation is leftover microwave radiation leftover from the Big Bang event and fills the universe. The universe has an average temperature of 2-3˚ Kelvin, which is what the Big Bang Model predicts would be the temperature after cooling from the event. 3. Scientists h ...
... background radiation (CBR). This radiation is leftover microwave radiation leftover from the Big Bang event and fills the universe. The universe has an average temperature of 2-3˚ Kelvin, which is what the Big Bang Model predicts would be the temperature after cooling from the event. 3. Scientists h ...
Ordinary Stars - Edgewood High School
... Color = yellow Example: The Sun Type K Star: 3,500 - 5,000 K Color = Red Example: Aldebaran Type M Star: < 3,500 K Color = Red Example: Betelgeuse ...
... Color = yellow Example: The Sun Type K Star: 3,500 - 5,000 K Color = Red Example: Aldebaran Type M Star: < 3,500 K Color = Red Example: Betelgeuse ...
29.2 Measuring the Stars - Mr. Tobin`s Earth Science Class
... Students will be able to distinguish between brightness and luminosity. Students will be able to identify properties used to classify stars. ...
... Students will be able to distinguish between brightness and luminosity. Students will be able to identify properties used to classify stars. ...
Apparent brightness
... Classification of Stars Color and temperature can classify stars well enough but SPECTROSCOPY gives us spectral-line radiation which is a much more detailed classification theme. The composition of these stars are the same the difference in absorption spectra is temperature. ...
... Classification of Stars Color and temperature can classify stars well enough but SPECTROSCOPY gives us spectral-line radiation which is a much more detailed classification theme. The composition of these stars are the same the difference in absorption spectra is temperature. ...
Colonization of the Milky Way The distances between the stars are
... than ten billion years, so does the time or the distance win? An easy way to see that the time is triumphant is to note that a speed of 30 km/s, comparable to the fastest spacecraft our still-young civilization has launched, is about 1/10,000 times the speed of light. Our galaxy is about 100,000 lig ...
... than ten billion years, so does the time or the distance win? An easy way to see that the time is triumphant is to note that a speed of 30 km/s, comparable to the fastest spacecraft our still-young civilization has launched, is about 1/10,000 times the speed of light. Our galaxy is about 100,000 lig ...
It is evident from our observations of impact craters on planets and
... The cause of auroras was explained and the connection to why they are more prominent near the poles was linked to Earth’s magnetic field. Understanding the stars has been greatly augmented with the development of large telescopes and instruments that accurately measure and analyze starlight. In part ...
... The cause of auroras was explained and the connection to why they are more prominent near the poles was linked to Earth’s magnetic field. Understanding the stars has been greatly augmented with the development of large telescopes and instruments that accurately measure and analyze starlight. In part ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.