Stellar Census
... Objects with masses between 1/100 and 1/12 that of the Sun are called brown dwarfs They may produce energy for a brief time by nuclear reactions, but do not become hot enough to fuse protons They are intermediate in mass between stars and planets ...
... Objects with masses between 1/100 and 1/12 that of the Sun are called brown dwarfs They may produce energy for a brief time by nuclear reactions, but do not become hot enough to fuse protons They are intermediate in mass between stars and planets ...
The formation of the galaxy is believed to be similar
... One model for the formation of the Milky Way can be divided into 2 phases: a spherical gas cloud (halo) collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most lik ...
... One model for the formation of the Milky Way can be divided into 2 phases: a spherical gas cloud (halo) collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most lik ...
Physics 1040 Constellation paper
... The Greek mythology behind the constellation Ursa Major or the Great Bear is related to Callisto who was a servant of the hunter Artemis, Callisto had given birth to a child by Zeus, who was named Arcas. Artemis banished Callisto after the birth of Arcas for being impure. Hera, who was Zeus’ wife, b ...
... The Greek mythology behind the constellation Ursa Major or the Great Bear is related to Callisto who was a servant of the hunter Artemis, Callisto had given birth to a child by Zeus, who was named Arcas. Artemis banished Callisto after the birth of Arcas for being impure. Hera, who was Zeus’ wife, b ...
Evolved Stellar Populations
... stars allows to estimate variations in meanage and metallicity across stellar populations. Modest but complete samples produce ...
... stars allows to estimate variations in meanage and metallicity across stellar populations. Modest but complete samples produce ...
Properties of Stars - Montana State University Extended University
... electromagnetic radiation chapter) is usually not as accurate as using the spectral lines? 8. What are the 7 basic spectral types in order of temperature (hottest to coldest)? 9. If our Sun has a surface temperature of 5840 K, how many times hotter than the Sun is the hottest O-type star? How many t ...
... electromagnetic radiation chapter) is usually not as accurate as using the spectral lines? 8. What are the 7 basic spectral types in order of temperature (hottest to coldest)? 9. If our Sun has a surface temperature of 5840 K, how many times hotter than the Sun is the hottest O-type star? How many t ...
Chapter 30: Stars
... The top layer of the Sun’s atmosphere, called the corona, extends several million kilometers from the top of the chromosphere and has a temperature range of 1 million to 2 million K. The density of the gas in the corona is very low, which explains why the corona is so dim that it can be seen only wh ...
... The top layer of the Sun’s atmosphere, called the corona, extends several million kilometers from the top of the chromosphere and has a temperature range of 1 million to 2 million K. The density of the gas in the corona is very low, which explains why the corona is so dim that it can be seen only wh ...
Chasing the Pole — Howard L. Cohen
... makes this star’s orbit similar in size to the orbit of Uranus (but much more noncircular). The Hubble Space Telescope finally imaged this third star a few years ago (Hupp et al. 2006). Interestingly, all three stars in this triple system have similar principle spectral classes (Type F) showing they ...
... makes this star’s orbit similar in size to the orbit of Uranus (but much more noncircular). The Hubble Space Telescope finally imaged this third star a few years ago (Hupp et al. 2006). Interestingly, all three stars in this triple system have similar principle spectral classes (Type F) showing they ...
PSF - ESO
... The program starts off by considering the first input list as a "master" list. Taking each star in turn from the second input list, it applies the provisional transformations derived to determine the star's position in the coordinate system of the master list. It then goes through the master list, l ...
... The program starts off by considering the first input list as a "master" list. Taking each star in turn from the second input list, it applies the provisional transformations derived to determine the star's position in the coordinate system of the master list. It then goes through the master list, l ...
3P15.pdf
... High resolution spectra of 10 UV Cet type flare stars have been analysed in this work. Age, line profiles, rotation and flux-flux relationships have been studied and the results have been compared with the ones obtained by López-Santiago et al (2004a, b) for a sample of 144 stars, with spectral type ...
... High resolution spectra of 10 UV Cet type flare stars have been analysed in this work. Age, line profiles, rotation and flux-flux relationships have been studied and the results have been compared with the ones obtained by López-Santiago et al (2004a, b) for a sample of 144 stars, with spectral type ...
HR Diagram Explorer
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you control the variables plotted on the x-axis: (temperature, B-V, or spectral type) and those plotted on the y-ax ...
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you control the variables plotted on the x-axis: (temperature, B-V, or spectral type) and those plotted on the y-ax ...
PPS
... Josef von Fraunhofer (1787-1826) in 1814. He was the first person to study the rainbow pattern produced by passing light through a prism in detail under intense magnification. He was actually interested in the properties of the glass in the prisms, and how in affected the light, but to his surprise ...
... Josef von Fraunhofer (1787-1826) in 1814. He was the first person to study the rainbow pattern produced by passing light through a prism in detail under intense magnification. He was actually interested in the properties of the glass in the prisms, and how in affected the light, but to his surprise ...
Stellar Physics
... introduction of the Properties of stars and the Stellar evolution topics as specified in the Rotational Motion and Astrophysics unit of the new Advanced Higher arrangements for physics. To see where each section corresponds to the Arrangements document, the headings and sub-headings correspond to th ...
... introduction of the Properties of stars and the Stellar evolution topics as specified in the Rotational Motion and Astrophysics unit of the new Advanced Higher arrangements for physics. To see where each section corresponds to the Arrangements document, the headings and sub-headings correspond to th ...
Jura et al. 2004 - Department of Physics and Astronomy
... 0.06 M⊕ . The summed mass of the KBOs in the Solar System is uncertain and is currently estimated to be between 0.02 M⊕ and 0.1 M⊕ (Bernstein et al. 2003; Luu & Jewitt 2002). Typical analogs of the Kuiper Belt may have total masses ≤ 0.1 M⊕ (Jura 2004). Since we observed stars with notable infrared ...
... 0.06 M⊕ . The summed mass of the KBOs in the Solar System is uncertain and is currently estimated to be between 0.02 M⊕ and 0.1 M⊕ (Bernstein et al. 2003; Luu & Jewitt 2002). Typical analogs of the Kuiper Belt may have total masses ≤ 0.1 M⊕ (Jura 2004). Since we observed stars with notable infrared ...
Pretty Pictures of the Cosmos
... distant galaxies form a dramatic backdrop for disrupted spiral galaxy Arp 188, the Tadpole Galaxy. The cosmic Tadpole is a mere 420 million light-years distant toward the northern constellation Draco. Its eye-catching tail is about 280 thousand light-years long and features massive, bright blue star ...
... distant galaxies form a dramatic backdrop for disrupted spiral galaxy Arp 188, the Tadpole Galaxy. The cosmic Tadpole is a mere 420 million light-years distant toward the northern constellation Draco. Its eye-catching tail is about 280 thousand light-years long and features massive, bright blue star ...
Spatial distribution of stars in the Milky Way
... They found a relation between the MV and (V-I), that was then used to derive MV for those stars which did not have a distance estimate. Most stars are MS dwarfs and hence such a relation is not very surprising. Contamination due to giant stars starts to become important at (V-I) ~ 2.3, which for dwa ...
... They found a relation between the MV and (V-I), that was then used to derive MV for those stars which did not have a distance estimate. Most stars are MS dwarfs and hence such a relation is not very surprising. Contamination due to giant stars starts to become important at (V-I) ~ 2.3, which for dwa ...