Chapter 2 Discovering the Universe for Yourself
... • But very difficult to explain if you think that Earth is the center of the universe! • In fact, ancients considered but rejected the ...
... • But very difficult to explain if you think that Earth is the center of the universe! • In fact, ancients considered but rejected the ...
Extraterrestrial Life
... Fs – fraction of stars with properties for life to develop • Water is probably essential as a solvent. So, planet must have exact temperature (distance from the star) to have water (liquid state). Between 273 K and 373 K. • Pressure must be right too (atmosphere weights the equivalent to 3 elephants ...
... Fs – fraction of stars with properties for life to develop • Water is probably essential as a solvent. So, planet must have exact temperature (distance from the star) to have water (liquid state). Between 273 K and 373 K. • Pressure must be right too (atmosphere weights the equivalent to 3 elephants ...
Spectral_Analysis
... indicators of chemical composition, they set about identifying the observed lines in the solar spectrum (The spectrum given out by the sun). Almost all the lines in light from extraterrestrial sources were attributed to known elements, however, some new lines also appeared in the solar spectrum. In ...
... indicators of chemical composition, they set about identifying the observed lines in the solar spectrum (The spectrum given out by the sun). Almost all the lines in light from extraterrestrial sources were attributed to known elements, however, some new lines also appeared in the solar spectrum. In ...
High Mass Stellar Evolution
... If the mass of the core is > 1.4 Msolar then a neutron star is formed. If the mass of the core is > 3.0 Msolar then a black hole is formed. Important: Note that these values are for the mass of the core left over – not the initial mass of the star. Note: The 1.4 Msolar limit is known as the ...
... If the mass of the core is > 1.4 Msolar then a neutron star is formed. If the mass of the core is > 3.0 Msolar then a black hole is formed. Important: Note that these values are for the mass of the core left over – not the initial mass of the star. Note: The 1.4 Msolar limit is known as the ...
ppt
... was embedded in enormous shell of stars… Emmanuel Kant (1755) suggested instead that the MW is a giant disk of stars. Kant also hypothesized that space was full of other, similar disks of stars (island universes). ...
... was embedded in enormous shell of stars… Emmanuel Kant (1755) suggested instead that the MW is a giant disk of stars. Kant also hypothesized that space was full of other, similar disks of stars (island universes). ...
Astronomy 112: Physics of Stars Problem set 1 solutions 1
... we want to calculate the masses of the two stars, M1 and M2 . For simplicity we will assume that the orbit is circular, with semi-major axis a. The orbital plane of the binary is inclined at an unknown angle i relative to the plane of the sky, where i = 0 corresponds to an orbit that is perfectly fa ...
... we want to calculate the masses of the two stars, M1 and M2 . For simplicity we will assume that the orbit is circular, with semi-major axis a. The orbital plane of the binary is inclined at an unknown angle i relative to the plane of the sky, where i = 0 corresponds to an orbit that is perfectly fa ...
AST1100 Lecture Notes
... another another possibility: spectral classes. Stars are classified according to their spectral class which consists of a letter and a number. This historical classification is based on the strength of different spectral lines found in the spectra of the stars. It turned out later that these spectra ...
... another another possibility: spectral classes. Stars are classified according to their spectral class which consists of a letter and a number. This historical classification is based on the strength of different spectral lines found in the spectra of the stars. It turned out later that these spectra ...
Integrative Studies 410 Our Place in the Universe
... distance ladder out as far as we can see Cepheids – about 50 million ly • In 1920 Hubble used this technique to measure the distance to Andromeda (about 2 million ly) • Works best for periodic variables ...
... distance ladder out as far as we can see Cepheids – about 50 million ly • In 1920 Hubble used this technique to measure the distance to Andromeda (about 2 million ly) • Works best for periodic variables ...
More detailed notes - Particle Physics and Particle Astrophysics
... so their brightness is overestimated: they should be moved down by about 0.75 magnitudes.) The more massive (i.e. bluer) members of the β Pictoris association have already reached the main sequence, but the less massive ones further to the right have not—this confirms that less massive objects evolv ...
... so their brightness is overestimated: they should be moved down by about 0.75 magnitudes.) The more massive (i.e. bluer) members of the β Pictoris association have already reached the main sequence, but the less massive ones further to the right have not—this confirms that less massive objects evolv ...
The Milky Way galaxy
... Your book gives estimates of the mass of the Galaxy from 1 to 4 X 1011 solar masses. A more recent determination of the mass of the Galaxy is even larger, 1.5-4.0 X 1012 solar masses. This is on the basis of stars of known absolute magnitude called horizontal branch stars. An analysis of 1000 of th ...
... Your book gives estimates of the mass of the Galaxy from 1 to 4 X 1011 solar masses. A more recent determination of the mass of the Galaxy is even larger, 1.5-4.0 X 1012 solar masses. This is on the basis of stars of known absolute magnitude called horizontal branch stars. An analysis of 1000 of th ...
Giant Molecular Clouds and Gravitational Stability
... Ionized material inside the HII region is very hot (~104 K). Therefore pressure is about thousand times higher than in the neutral surrounding medium. The sphere expands and drives a strong shock through the medium. ...
... Ionized material inside the HII region is very hot (~104 K). Therefore pressure is about thousand times higher than in the neutral surrounding medium. The sphere expands and drives a strong shock through the medium. ...
without video - Scott Marley
... What type of stars have planets? Most currently known planets orbit around sun-like stars, but this is mainly because current observing programs tend to concentrate on these types. The smallest type M stars probably don’t have planets, the largest O type are so hot that they produce a photoevaporat ...
... What type of stars have planets? Most currently known planets orbit around sun-like stars, but this is mainly because current observing programs tend to concentrate on these types. The smallest type M stars probably don’t have planets, the largest O type are so hot that they produce a photoevaporat ...
The Life And Times Of A Star
... The star has run out of hydrogen fuel in its core. The hydrogen fusion is now happening in a thin shell surrounding the “dead” core. All the extra energy has swelled the stars outer layers a great deal, and caused the star to cool off. It has left the main sequence and become a red ...
... The star has run out of hydrogen fuel in its core. The hydrogen fusion is now happening in a thin shell surrounding the “dead” core. All the extra energy has swelled the stars outer layers a great deal, and caused the star to cool off. It has left the main sequence and become a red ...
Quiz Maker - Geneva 304
... 1. From looking at Figure 24-11 in your book, draw the Lyman series and the Balmer series on the same wavelength axis, that is, on a horizontal straight line labeled in angstroms every 500 Å from 500 to 7,000 Å. ...
... 1. From looking at Figure 24-11 in your book, draw the Lyman series and the Balmer series on the same wavelength axis, that is, on a horizontal straight line labeled in angstroms every 500 Å from 500 to 7,000 Å. ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.