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... will be at different distances above an observer's horizon. If the observer is at a latitude of 60° N, then all constellations within 60° of the north celestial pole will be circumpolar. However, if an observer is at a latitude of only 30° N, then only those constellations within 30° of the north ce ...
... will be at different distances above an observer's horizon. If the observer is at a latitude of 60° N, then all constellations within 60° of the north celestial pole will be circumpolar. However, if an observer is at a latitude of only 30° N, then only those constellations within 30° of the north ce ...
Chapter 12 Star Stuff How do stars form?
... • Two quantum particles—electrons, nuclei, etc—cannot be in the same place at the same time • So they can only get so close • When a protostar has contracted to the point where it can’t contract anymore without particles being in the same place… • That’s one way of conceptualizing degeneracy pressur ...
... • Two quantum particles—electrons, nuclei, etc—cannot be in the same place at the same time • So they can only get so close • When a protostar has contracted to the point where it can’t contract anymore without particles being in the same place… • That’s one way of conceptualizing degeneracy pressur ...
Annual report 2004 - Département d`Astrophysique, Géophysique et
... line-profile variations in all lines in the wavelength region from H-alpha to H-epsilon indicated that about 30 lines contain significant pulsational information. It was demonstrated that by combining power spectra across more lines, the detection of oscillation frequencies was enhanced significantl ...
... line-profile variations in all lines in the wavelength region from H-alpha to H-epsilon indicated that about 30 lines contain significant pulsational information. It was demonstrated that by combining power spectra across more lines, the detection of oscillation frequencies was enhanced significantl ...
Telescopes: More Than Meets the Eye
... Constellations: Imaginary, dot-to-dot pictures drawn using the stars as the dots. These are used to map the nighttime sky. There are 88 constellations all together. Deep Space Objects: These objects are very distant from Earth and can usually only be seen with a telescope. They include: galaxies, di ...
... Constellations: Imaginary, dot-to-dot pictures drawn using the stars as the dots. These are used to map the nighttime sky. There are 88 constellations all together. Deep Space Objects: These objects are very distant from Earth and can usually only be seen with a telescope. They include: galaxies, di ...
GG_CERN_0707
... Apparently dark-matter dominated ~ 10km/s, 10 < ~ M/L <~ 100 Metal-poor, mean stellar metallicity < ~ –1.5 dex All contain old stars; extended star-formation histories typical, intermediate-age stars dominate Most common galaxy nearby Crucial tests for CDM and other models ...
... Apparently dark-matter dominated ~ 10km/s, 10 < ~ M/L <~ 100 Metal-poor, mean stellar metallicity < ~ –1.5 dex All contain old stars; extended star-formation histories typical, intermediate-age stars dominate Most common galaxy nearby Crucial tests for CDM and other models ...
Recent science results from VLTI commissioning
... • Stellar parameters from lit (225km/s projected velocity etc) An extreme uniform Roche model with veq=vcrit and i=90° was also used Results: • Be star models don’t work • Extreme (equator-on, rotation at break-up speed) Roche model does but…it is not consistent with known properties of Be stars (no ...
... • Stellar parameters from lit (225km/s projected velocity etc) An extreme uniform Roche model with veq=vcrit and i=90° was also used Results: • Be star models don’t work • Extreme (equator-on, rotation at break-up speed) Roche model does but…it is not consistent with known properties of Be stars (no ...
Slide 1
... recent years, astronomers have developed several very reliable and independent methods of determining the distances to the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), two of the nearby satellite galaxies of our own Milky Way Galaxy. Since the LMC and SMC contain large number of Ce ...
... recent years, astronomers have developed several very reliable and independent methods of determining the distances to the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), two of the nearby satellite galaxies of our own Milky Way Galaxy. Since the LMC and SMC contain large number of Ce ...
Future of asteroseismology
... • Multi-object spectrographs (but hard to ensure radial-velocity precision) • Intensity observations of multiple stars from space (HK lecture) ...
... • Multi-object spectrographs (but hard to ensure radial-velocity precision) • Intensity observations of multiple stars from space (HK lecture) ...
Lecture 5
... recent years, astronomers have developed several very reliable and independent methods of determining the distances to the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), two of the nearby satellite galaxies of our own Milky Way Galaxy. Since the LMC and SMC contain large number of Ce ...
... recent years, astronomers have developed several very reliable and independent methods of determining the distances to the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), two of the nearby satellite galaxies of our own Milky Way Galaxy. Since the LMC and SMC contain large number of Ce ...
On the correlation between stellar chromospheric flux and the
... Robinson 1989a,b). Prominence-like structures were also observed in CoRoT-2 (Czesla et al. 2012). In late-type stars that are accompanied by close-in planets, different magnetic configurations are possible, including some that are capable of sustaining plasma condensations against the stellar gravit ...
... Robinson 1989a,b). Prominence-like structures were also observed in CoRoT-2 (Czesla et al. 2012). In late-type stars that are accompanied by close-in planets, different magnetic configurations are possible, including some that are capable of sustaining plasma condensations against the stellar gravit ...
Constellation Classification Cards*
... temperature, and color. 1. Distribute the laminated cards, one per student. At the end of this activity, we give recommended stars for groups of 20 and 30 girls/students. The sets are designed to assure that there are at least two stars per constellation (except Procyon in Canis Minor) and that the ...
... temperature, and color. 1. Distribute the laminated cards, one per student. At the end of this activity, we give recommended stars for groups of 20 and 30 girls/students. The sets are designed to assure that there are at least two stars per constellation (except Procyon in Canis Minor) and that the ...
Images from the Las Cumbres Observatory Global Telescope
... This map shows the constellations seen in the South during the early evening, including the prominent constellation of Orion. Moving up and to the right - following the line of the 3 stars of Orion's belt - brings one to Taurus; the head of the bull being outlined by the V-shaped cluster called the ...
... This map shows the constellations seen in the South during the early evening, including the prominent constellation of Orion. Moving up and to the right - following the line of the 3 stars of Orion's belt - brings one to Taurus; the head of the bull being outlined by the V-shaped cluster called the ...
Stars A globular cluster is a tightly grouped swarm of stars held
... The distance from the sun to Proxima Centauri is more than 25 trillion miles (40 trillion kilometers). This distance is so great that light takes 4.2 years to travel between the two stars. Scientists say that Proxima Centauri is 4.2 light-years from the sun. One light-year, the distance that light t ...
... The distance from the sun to Proxima Centauri is more than 25 trillion miles (40 trillion kilometers). This distance is so great that light takes 4.2 years to travel between the two stars. Scientists say that Proxima Centauri is 4.2 light-years from the sun. One light-year, the distance that light t ...
It`s cosmic! - NSW Department of Education
... Each galaxy is a very large spinning structure. It contains billions of stars. It also contains clouds of gas and dust called nebulas. Some of the stars, like our Sun, have planets. All these things are held together in each galaxy by gravitational forces. (You feel a gravitational force on Earth. I ...
... Each galaxy is a very large spinning structure. It contains billions of stars. It also contains clouds of gas and dust called nebulas. Some of the stars, like our Sun, have planets. All these things are held together in each galaxy by gravitational forces. (You feel a gravitational force on Earth. I ...
10 Stellar Evolution - Journigan-wiki
... Small-mass stars live for billions of years. They are thrifty with their fuel. As their hydrogen becomes diminished, they begin to convert helium into yet heavier ...
... Small-mass stars live for billions of years. They are thrifty with their fuel. As their hydrogen becomes diminished, they begin to convert helium into yet heavier ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.