Sun - Midlandstech
... They were believed to represent great heroes and mythological figures. Their position in the sky seemed to tell stories that were handed down from generation to generation over thousands of years. ...
... They were believed to represent great heroes and mythological figures. Their position in the sky seemed to tell stories that were handed down from generation to generation over thousands of years. ...
Chapter 2 User`s Guide to the Sky
... They were believed to represent great heroes and mythological figures. Their position in the sky seemed to tell stories that were handed down from generation to generation over thousands of years. ...
... They were believed to represent great heroes and mythological figures. Their position in the sky seemed to tell stories that were handed down from generation to generation over thousands of years. ...
Life Cycle of a Star
... medium mass star from red giant to white dwarf (stage 13). Eventually, the star will cool down, radiating heat into space, fading into black lumps of carbon. This is when the star becomes a black dwarf (stage 14) . ...
... medium mass star from red giant to white dwarf (stage 13). Eventually, the star will cool down, radiating heat into space, fading into black lumps of carbon. This is when the star becomes a black dwarf (stage 14) . ...
Lecture17
... How can this be? They emit less light per square meter than a blue main sequence star, but, they are much, much bigger (more square meters)! ...
... How can this be? They emit less light per square meter than a blue main sequence star, but, they are much, much bigger (more square meters)! ...
CASPEC Observations of the Most Metal-Deficient Main
... and the relative low CCD sensitivity in the UV may prohibit high resolution, high SIN spectra to be taken at this wavelength at least with present-day telescopes. The binary nature of CS 22876-32 makes it an even more interesting star. Spectra obtained on three consecutive nights show about the same ...
... and the relative low CCD sensitivity in the UV may prohibit high resolution, high SIN spectra to be taken at this wavelength at least with present-day telescopes. The binary nature of CS 22876-32 makes it an even more interesting star. Spectra obtained on three consecutive nights show about the same ...
mass_spetral
... When the stars are farther apart (a is increased) they move more slowly in their orbit. Measuring the time it takes for the spectral lines to return to their starting wavelength gives us the orbital ...
... When the stars are farther apart (a is increased) they move more slowly in their orbit. Measuring the time it takes for the spectral lines to return to their starting wavelength gives us the orbital ...
The Hertzsprung-Russell Diagram
... The masses can be found from M1+M2 (suns) = a(AU)3 / P(yr)2 (individual masses can be gotten if you have a signal from both stars) The orbital period comes from watching the stars, or the periodic variation of their velocity or brightness. To get orbital semimajor axis, you need either the parallax ...
... The masses can be found from M1+M2 (suns) = a(AU)3 / P(yr)2 (individual masses can be gotten if you have a signal from both stars) The orbital period comes from watching the stars, or the periodic variation of their velocity or brightness. To get orbital semimajor axis, you need either the parallax ...
Due: January 14, 2014 Name: White dwarfs are “has been
... The energy radiated from a protostar comes from gravitational potential energy that is converted to kinetic and then thermal energy when the matter within the protostar falls toward the core. The energy radiated by a main-sequence star comes from nuclear fusion. ...
... The energy radiated from a protostar comes from gravitational potential energy that is converted to kinetic and then thermal energy when the matter within the protostar falls toward the core. The energy radiated by a main-sequence star comes from nuclear fusion. ...
Astronomy Club
... correspond to a sequence of decreasing surface temperatures and hence intrinsic luminosity i.e. energy emitted per unit time. So various spectral types of stars are: O ...
... correspond to a sequence of decreasing surface temperatures and hence intrinsic luminosity i.e. energy emitted per unit time. So various spectral types of stars are: O ...
Lecture Ten - The Sun Amongst the Stars Part II
... point that needs to be made before we press on, because an H-R diagram like this one disguises another key characteristic of the stars in our galaxy… From this figure, what would you guess is the most common type of MS star? O B A ...
... point that needs to be made before we press on, because an H-R diagram like this one disguises another key characteristic of the stars in our galaxy… From this figure, what would you guess is the most common type of MS star? O B A ...
Powerpoint Presentation (large file)
... the formation of elements heavier than iron requires an input of energy rather than causing energy to be released ...
... the formation of elements heavier than iron requires an input of energy rather than causing energy to be released ...
lect3 — 1 Measuring stars: What can be measured?
... Hence by measuring the apparent magnitude m, and somehow knowing the absolute magnitude M (i.e. the true luminosity), one can infer the distance D (in pc). H-R diagram distance: We discussed the H-R diagram last time as a relation between temperature and luminosity. In observational terms, it is act ...
... Hence by measuring the apparent magnitude m, and somehow knowing the absolute magnitude M (i.e. the true luminosity), one can infer the distance D (in pc). H-R diagram distance: We discussed the H-R diagram last time as a relation between temperature and luminosity. In observational terms, it is act ...
Part 2 - Aryabhat
... Sirius resides in the constellation Canis Major, the Big Dog, and is commonly called the Dog Star. In ancient Greek times the dawn rising of Sirius marked the hottest part of summer. This is the origin of the phrase "dog days of summer." Because of Earth’s 26,000-year precession cycle, in which the ...
... Sirius resides in the constellation Canis Major, the Big Dog, and is commonly called the Dog Star. In ancient Greek times the dawn rising of Sirius marked the hottest part of summer. This is the origin of the phrase "dog days of summer." Because of Earth’s 26,000-year precession cycle, in which the ...
Lecture 12
... An H-R diagram for the 5000 stars with the best distance determinations from Hipparcos: `Observational’ axes: color and absolute magnitude Colors indicate the density of stars in that part of the diagram Most important point: most of the possible combinations of L and Te are not populated by real st ...
... An H-R diagram for the 5000 stars with the best distance determinations from Hipparcos: `Observational’ axes: color and absolute magnitude Colors indicate the density of stars in that part of the diagram Most important point: most of the possible combinations of L and Te are not populated by real st ...
M WHITE DWAR F The WhiTe-hoT Core
... “Wow! This star is unbelievably hot—25,000 degrees Celsius!” Kara exclaimed. ...
... “Wow! This star is unbelievably hot—25,000 degrees Celsius!” Kara exclaimed. ...
Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive 'M' shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a 'W' shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper.In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest from September to early November in its characteristic 'M' shape. Even in low southern latitudes below 25ºS is can be seen low in the North.