Document
... stars named after the star delta Cephei • Cepheids cross the instability strip on the HertzsprungRussel diagram multiple times as they use a He-II ionization zone pulsation mechanism • All RR Lyrae stars have about the same intrinsic brightness, so differences in apparent magnitude result only from ...
... stars named after the star delta Cephei • Cepheids cross the instability strip on the HertzsprungRussel diagram multiple times as they use a He-II ionization zone pulsation mechanism • All RR Lyrae stars have about the same intrinsic brightness, so differences in apparent magnitude result only from ...
Mirrored Image Sep06.pub - High Desert Astronomical Society
... This dim, magnitude 9.57, star is the next closest to our Sun after the Alpha Centauri system. It is located about 5.96 light-years away in the northernmost part of the constellation Ophiuchus, the Serpent Holder; just west of Cebalrai (Beta Ophiuchi) near coordinates (17:57:48.5 +04:41:36.2, ICRS 2 ...
... This dim, magnitude 9.57, star is the next closest to our Sun after the Alpha Centauri system. It is located about 5.96 light-years away in the northernmost part of the constellation Ophiuchus, the Serpent Holder; just west of Cebalrai (Beta Ophiuchi) near coordinates (17:57:48.5 +04:41:36.2, ICRS 2 ...
Motions of the Earth
... • The brightest stars have lots of names, none official. There are some widely-used catalogues. • A convention often used in astronomy is to use the Greek alphabet to identify the brightest stars in the constellations. - Sirius = α Canis Majoris is the brightest star in the constellation Canis Ma ...
... • The brightest stars have lots of names, none official. There are some widely-used catalogues. • A convention often used in astronomy is to use the Greek alphabet to identify the brightest stars in the constellations. - Sirius = α Canis Majoris is the brightest star in the constellation Canis Ma ...
Chapter 17 Measuring the Stars
... In order to measure stellar masses in a binary star, the period and semimajor axis of the orbit must be measured. Once this is done, Kepler’s third law gives the sum of the masses of the two stars. Then the relative speeds of the two stars can be measured using the Doppler effect; the speed will be ...
... In order to measure stellar masses in a binary star, the period and semimajor axis of the orbit must be measured. Once this is done, Kepler’s third law gives the sum of the masses of the two stars. Then the relative speeds of the two stars can be measured using the Doppler effect; the speed will be ...
Stellar Evolution of Single Stars
... Stellar Evolution of Single Stars Stellar evolution can be divided into 3 distinct phases: 1)Pre-main sequence evolution: a relatively short (~ 107-8 yrs) phase, but involving many complex processes. An active research area. 2)Main sequence phase: the longest phase of a star’s life ~ 1010 yrs for th ...
... Stellar Evolution of Single Stars Stellar evolution can be divided into 3 distinct phases: 1)Pre-main sequence evolution: a relatively short (~ 107-8 yrs) phase, but involving many complex processes. An active research area. 2)Main sequence phase: the longest phase of a star’s life ~ 1010 yrs for th ...
Stars: from Adolescence to Old Age
... in a quick burst called the helium flash After this, the star becomes stable, its surface temperature increases, and its luminosity and size decreases At this stage, carbon nuclei sometimes fuse with helium nuclei to form oxygen nuclei ...
... in a quick burst called the helium flash After this, the star becomes stable, its surface temperature increases, and its luminosity and size decreases At this stage, carbon nuclei sometimes fuse with helium nuclei to form oxygen nuclei ...
16SolMW - NMSU Astronomy
... • All of the stars we see in the sky are in the Milky Way galaxy, relatively nearby to us • All stars are NOT the same: looking at a picture, what are some apparent differences? • Stars come in a wide range of brightnesses – We see stars because they shine (energy from nuclear reactions in their cen ...
... • All of the stars we see in the sky are in the Milky Way galaxy, relatively nearby to us • All stars are NOT the same: looking at a picture, what are some apparent differences? • Stars come in a wide range of brightnesses – We see stars because they shine (energy from nuclear reactions in their cen ...
Deducing Temperatures and Luminosities of Stars
... • Two otherwise identical stars (same radius, same temperature ⇒ same luminosity) will still appear vastly different in brightness if their distances from Earth are different • Reason: intensity of light inversely proportional to the square of the distance the light has to travel – Light waves from ...
... • Two otherwise identical stars (same radius, same temperature ⇒ same luminosity) will still appear vastly different in brightness if their distances from Earth are different • Reason: intensity of light inversely proportional to the square of the distance the light has to travel – Light waves from ...
Phase Analysis of RV Tauri and Semi-regular Variables Abstract
... variable stars. The ultimate objective for our research is to determine whether the stars stellar properties such as temperature, radius, and luminosity correlate with their pulsation cycles. In order to determine this, we need to closely examine the light curves to determined the proper pulsation p ...
... variable stars. The ultimate objective for our research is to determine whether the stars stellar properties such as temperature, radius, and luminosity correlate with their pulsation cycles. In order to determine this, we need to closely examine the light curves to determined the proper pulsation p ...
Midterm Study Game
... What was Copernicus’ contribution to Astronomy? Copernicus was the scientist who first believed that the Sun was the center of the solar system, not the Earth AND that all the objects in our solar system revolve around the sun. Galileo also helped confirm this with his trusty telescope! ...
... What was Copernicus’ contribution to Astronomy? Copernicus was the scientist who first believed that the Sun was the center of the solar system, not the Earth AND that all the objects in our solar system revolve around the sun. Galileo also helped confirm this with his trusty telescope! ...
Document
... Chapter 4: The Night Sky a. Movement of the Night Sky b. Stars i. Naming them ii. Favorite Stars c. Brightness of Stars d. Magnitude Scale e. Apparent Visual Magnitude f. Flux and Intensity g. Magnitude and Intensity of star light i. Equations (2) h. The Celestial Sphere i. Angular Distance i. Arc M ...
... Chapter 4: The Night Sky a. Movement of the Night Sky b. Stars i. Naming them ii. Favorite Stars c. Brightness of Stars d. Magnitude Scale e. Apparent Visual Magnitude f. Flux and Intensity g. Magnitude and Intensity of star light i. Equations (2) h. The Celestial Sphere i. Angular Distance i. Arc M ...
Tutorial: Motion
... If you get stuck or are not sure of your answer ask another group If you get really stuck or don’t understand what the Lecture Tutorial is asking as one of us for help ...
... If you get stuck or are not sure of your answer ask another group If you get really stuck or don’t understand what the Lecture Tutorial is asking as one of us for help ...
The Hertzsprung-Russell diagram and the nature of stars
... The Sun is a class G2V star…a main sequence, spectral class G star…the Galaxy probably has a billion of them ...
... The Sun is a class G2V star…a main sequence, spectral class G star…the Galaxy probably has a billion of them ...
proposed october viewing list
... the densest globular cluster in our galaxy. The accepted diameter of M15 is about 175 light years. The globular cluster is thought by some to contain a supermassive black hole. NGC7331 Discovered by William Herschel in 1784 in the constellation Pegasus (PEG-uh-sus), this is a bright spiral galaxy vi ...
... the densest globular cluster in our galaxy. The accepted diameter of M15 is about 175 light years. The globular cluster is thought by some to contain a supermassive black hole. NGC7331 Discovered by William Herschel in 1784 in the constellation Pegasus (PEG-uh-sus), this is a bright spiral galaxy vi ...
Star Classification - University of Louisville
... An old Blue-white star becomes a Supergiant. They expand, just like average-sized stars expand to become Giant stars. Because they are beginning to run out of hydrogen, they cool down and glow a more orangey color. A star called Betelguese is extremely old, but also extremely big. In fact, it is 500 ...
... An old Blue-white star becomes a Supergiant. They expand, just like average-sized stars expand to become Giant stars. Because they are beginning to run out of hydrogen, they cool down and glow a more orangey color. A star called Betelguese is extremely old, but also extremely big. In fact, it is 500 ...
doc - EU-HOU
... (IAP) and Michel and Suzanne Faye, who tested it in high schools. It has been subsequently updated by Stefano Bertone, Gilles Chagnon and Anne-Laure Melchior. In this exercise, we explain how an invisible companion orbiting its parent star can be detected using precise measurement of the star’s velo ...
... (IAP) and Michel and Suzanne Faye, who tested it in high schools. It has been subsequently updated by Stefano Bertone, Gilles Chagnon and Anne-Laure Melchior. In this exercise, we explain how an invisible companion orbiting its parent star can be detected using precise measurement of the star’s velo ...
The Easily Visible Sky Tools of Astronomy Stars Galaxies Cosmology
... A Star’s brightness, depends on its distance from us. - there are stars much more luminous than our sun in the sky, however, they are not nearly as bright because they are far away. - Scientists will use apparent brightness and flux interchangeably. A star’s apparent brightness = ...
... A Star’s brightness, depends on its distance from us. - there are stars much more luminous than our sun in the sky, however, they are not nearly as bright because they are far away. - Scientists will use apparent brightness and flux interchangeably. A star’s apparent brightness = ...
What have we learned?
... – Observations of these pulses were the first evidence for neutron stars. ...
... – Observations of these pulses were the first evidence for neutron stars. ...
Draco: The Dragon - Courtney Stookey
... constellation quite literally looks like a snake slithering through the northern sky. While it’s not a very prominent constellation, it is still the 8th largest. There are quite a few versions of Greek mythology that are linked to Draco. There are 3 main contenders though. The most well-known myth i ...
... constellation quite literally looks like a snake slithering through the northern sky. While it’s not a very prominent constellation, it is still the 8th largest. There are quite a few versions of Greek mythology that are linked to Draco. There are 3 main contenders though. The most well-known myth i ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... You thought finding planets around stars hundreds of light-years away was spectacular, exceeded only by determining their sizes and orbits. Well, in the ongoing exoplanet version of the game “can you top this?” comes another phenomenal feat: discerning the weather on a distant exoplanet—including se ...
... You thought finding planets around stars hundreds of light-years away was spectacular, exceeded only by determining their sizes and orbits. Well, in the ongoing exoplanet version of the game “can you top this?” comes another phenomenal feat: discerning the weather on a distant exoplanet—including se ...
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.