HR-diagram - Bakersfield College
... • two stars with the same absolute magnitude would not be the same apparent magnitude WHY? • To compare absolute brightness • use a standard distance of 32.6 light-years away from earth ...
... • two stars with the same absolute magnitude would not be the same apparent magnitude WHY? • To compare absolute brightness • use a standard distance of 32.6 light-years away from earth ...
Introduction to Astronomy
... It’s what the apparent magnitude would be if the star were 33 light-years away. Sun’s absolute magnitude is about 5. • The formulas that relate magnitudes to brightnesses (in watts or W/m2) are complicated and not so important. ...
... It’s what the apparent magnitude would be if the star were 33 light-years away. Sun’s absolute magnitude is about 5. • The formulas that relate magnitudes to brightnesses (in watts or W/m2) are complicated and not so important. ...
Double Stars in Scorpio`s Claws
... As summer approaches, mighty Scorpius rises higher each night in the south. While many are familiar with the brilliant red giant Antares (the ‘Rival of Mars’), the claws of Scorpio hold a wealth of double stars that are a rewarding challenge to any astronomer. Some of these are actual double stars ( ...
... As summer approaches, mighty Scorpius rises higher each night in the south. While many are familiar with the brilliant red giant Antares (the ‘Rival of Mars’), the claws of Scorpio hold a wealth of double stars that are a rewarding challenge to any astronomer. Some of these are actual double stars ( ...
Night Sky Checklist July–August–September Unaided Eye Astronomy
... Delphinus, the Dolphin, is a faint little constellation that is noticeable mainly because it lies just outside the Summer Triangle between Cygnus and Aquila. Stars (The stars on the checklist are easily visible to the unaided eye except in the most light polluted parts of cities.) Antares is a red s ...
... Delphinus, the Dolphin, is a faint little constellation that is noticeable mainly because it lies just outside the Summer Triangle between Cygnus and Aquila. Stars (The stars on the checklist are easily visible to the unaided eye except in the most light polluted parts of cities.) Antares is a red s ...
The most important questions to study for the exam
... • It contains the biggest and brightest stars. • It contains the greatest number of stars. • It consists almost entirely of hot, bright stars. 8. A certain star is seen to have a relatively low surface temperature but a very high luminosity. What can we conclude from these observations? • The star i ...
... • It contains the biggest and brightest stars. • It contains the greatest number of stars. • It consists almost entirely of hot, bright stars. 8. A certain star is seen to have a relatively low surface temperature but a very high luminosity. What can we conclude from these observations? • The star i ...
3.5-star-id
... Northern horizon • The Big Dipper (in Ursa Major) is the most easily recognized asterism (it’s not a constellation!) • Use it to find The Little Dipper (Ursa Minor), Polaris (Ursa Minor), Cassiopeia, Arcturus (Bootes), Vega (Lyra), Deneb (Cygus), Altair (Aquila). • Deneb is part of the asterism, Th ...
... Northern horizon • The Big Dipper (in Ursa Major) is the most easily recognized asterism (it’s not a constellation!) • Use it to find The Little Dipper (Ursa Minor), Polaris (Ursa Minor), Cassiopeia, Arcturus (Bootes), Vega (Lyra), Deneb (Cygus), Altair (Aquila). • Deneb is part of the asterism, Th ...
Astronomy Toolkit
... others very faint in the sky • The apparent magnitude “m” of a star is a measure of how bright it appears in the sky – Some faint stars are intrinsically bright, but are very distant – Some bright stars are very faint but happen to lie close to us ...
... others very faint in the sky • The apparent magnitude “m” of a star is a measure of how bright it appears in the sky – Some faint stars are intrinsically bright, but are very distant – Some bright stars are very faint but happen to lie close to us ...
Star - Uplift Education
... Eclipsing binary: (Rare) binary-star system in which the two stars are too close to be seen separately but is aligned in such a way that from Earth we periodically observe changes in brightness as each star successively passes in front of the other, that is, eclipses the other ...
... Eclipsing binary: (Rare) binary-star system in which the two stars are too close to be seen separately but is aligned in such a way that from Earth we periodically observe changes in brightness as each star successively passes in front of the other, that is, eclipses the other ...
Universe 8e Lecture Chapter 17 Nature of Stars
... Stars come in a wide variety of sizes Stefan-Boltzmann law relates a star’s energy output, called LUMINOSITY, to its temperature and size. LUMINOSITY = 4pR2sT4 LUMINOSITY is measured in joules per square meter of a surface per second and s = 5.67 X 10-8 W m-2 K-4 ...
... Stars come in a wide variety of sizes Stefan-Boltzmann law relates a star’s energy output, called LUMINOSITY, to its temperature and size. LUMINOSITY = 4pR2sT4 LUMINOSITY is measured in joules per square meter of a surface per second and s = 5.67 X 10-8 W m-2 K-4 ...
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 ...
Three types of binary stars.
... If the binary stars are eclipsing, then it is guaranteed that we are in the orbital plane. This means that the maximum radial velocity on the velocity plot gives us the orbital velocity. Now we have “a” and we have “P”. We can get rid of one of the “M”s because we know how they are related. ...
... If the binary stars are eclipsing, then it is guaranteed that we are in the orbital plane. This means that the maximum radial velocity on the velocity plot gives us the orbital velocity. Now we have “a” and we have “P”. We can get rid of one of the “M”s because we know how they are related. ...
ASTRONOMY 130
... point for the north circumpolar constellations. Locate the Big Dipper. Begin with the star at the tip of the handle, this is Alkaid. Continue down the handle, the next star is Mizar. Look carefully at Mizar with the naked eye and then through one of the telescopes that are set on Mizar. Note your ob ...
... point for the north circumpolar constellations. Locate the Big Dipper. Begin with the star at the tip of the handle, this is Alkaid. Continue down the handle, the next star is Mizar. Look carefully at Mizar with the naked eye and then through one of the telescopes that are set on Mizar. Note your ob ...
Lucas - WordPress.com
... the Milky Way pass through Scorpius—the scorpion. As a result, you can find both the planets of our Solar System (which move along the ecliptic), and many kinds of deep sky objects in this constellation. Scorpius’s brightest star, Antares, is also known as the Heart of the Scorpion, because of it’s ...
... the Milky Way pass through Scorpius—the scorpion. As a result, you can find both the planets of our Solar System (which move along the ecliptic), and many kinds of deep sky objects in this constellation. Scorpius’s brightest star, Antares, is also known as the Heart of the Scorpion, because of it’s ...
Characterizing Stars - Department of Physics and Astronomy
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
10.1 The Solar Neighborhood Barnard`s Star
... spectral class 2. Use spectral class to estimate luminosity 3. Apply inverse-square law to find distance. ...
... spectral class 2. Use spectral class to estimate luminosity 3. Apply inverse-square law to find distance. ...
A small mass difference between Hydrogen and Helium The
... Basic physical process: the Doppler effect ...
... Basic physical process: the Doppler effect ...
The power plant of the Sun and stars
... Visual binaries…you can see them as two stars in a telescope Like Albireo, Sirius, Nu Draconis Alpha Geminorum: Castor ...
... Visual binaries…you can see them as two stars in a telescope Like Albireo, Sirius, Nu Draconis Alpha Geminorum: Castor ...
3.1e Finding Polaris and Sirius
... Using Orion’s Belt as ‘pointers’, but this time moving in the opposite direction, you pass through part of the constellation of Taurus which is shaped like a letter V. The brightest star of the V is Aldebaran – an orange giant star. Carrying further along the line brings you to the bright Open Clust ...
... Using Orion’s Belt as ‘pointers’, but this time moving in the opposite direction, you pass through part of the constellation of Taurus which is shaped like a letter V. The brightest star of the V is Aldebaran – an orange giant star. Carrying further along the line brings you to the bright Open Clust ...
Powerpoint Presentation (large file)
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
Chapter 15 part 1
... Barnard’s Star. Its parallax is 0.55'', so it lies at a distance of 1.8 pc, or 6.0 light-years. ...
... Barnard’s Star. Its parallax is 0.55'', so it lies at a distance of 1.8 pc, or 6.0 light-years. ...
August
... star splits into a close binary. While some observers see color differences, most see the stars as two pairs of white headlights oriented nearly perpendicular to each other. Albireo Beta Cygni, in the constellation Cygnus (SIG-nus) is probably not a true binary, but a visual double star with extraor ...
... star splits into a close binary. While some observers see color differences, most see the stars as two pairs of white headlights oriented nearly perpendicular to each other. Albireo Beta Cygni, in the constellation Cygnus (SIG-nus) is probably not a true binary, but a visual double star with extraor ...
chapter8
... intrinsic brightness or luminosity (L) and inversely proportional to the square of the distance (d): L ...
... intrinsic brightness or luminosity (L) and inversely proportional to the square of the distance (d): L ...
LAB: Star Classification
... exhaustion of their nuclear fuel. During the transition from a nuclear-burning star to the white dwarf stage, the star becomes very hot. Many such objects with surface temperatures around 100 000 Kelvin are known. Theories of stellar evolution predict that the stars can be much hotter. However, the ...
... exhaustion of their nuclear fuel. During the transition from a nuclear-burning star to the white dwarf stage, the star becomes very hot. Many such objects with surface temperatures around 100 000 Kelvin are known. Theories of stellar evolution predict that the stars can be much hotter. However, the ...
Capella
Capella is the brightest star in the constellation Auriga, the sixth brightest in the night sky and the third brightest in the northern celestial hemisphere, after Arcturus and Vega. Its name is derived from the diminutive of the Latin capra ""goat"", hence ""little goat"". Capella also bears the Bayer designation Alpha Aurigae (often abbreviated to α Aurigae, α Aur or Alpha Aur). Although it appears to be a single star to the naked eye, it is actually a star system of four stars in two binary pairs. The first pair consists of two bright, large type-G giant stars, both with a radius around 10 times that of the Sun and two and a half times its mass, in close orbit around each other. Designated Capella Aa and Capella Ab, these two stars have both exhausted their core hydrogen fuel and become giant stars, though it is unclear exactly what stage they are on the stellar evolutionary pathway. The second pair, around 10,000 astronomical units from the first, consists of two faint, small and relatively cool red dwarfs. They are designated Capella H and Capella L. The stars labelled Capella C through to G and I through to K are actually unrelated stars in the same visual field. The Capella system is relatively close, at only 42.8 light-years (13.1 pc) from Earth.