StarType
... When you look at the stars you’ll notice that some are white, some are yellow, and some are red. Stars are classified according to their colors, ranging from electric blue for the hottest stars to dull red for the coolest stars. Early spectrometers identified emission lines in the stars’ spectrum fo ...
... When you look at the stars you’ll notice that some are white, some are yellow, and some are red. Stars are classified according to their colors, ranging from electric blue for the hottest stars to dull red for the coolest stars. Early spectrometers identified emission lines in the stars’ spectrum fo ...
HOMEWORK #1
... You may assume the planet moves in a circular orbit and transits across the star’s diameter as seen from Earth. Show all your work even though you may not be satisfied with your final answer. We will discuss the details afterwards and learn an important lesson about assumptions and errors. ...
... You may assume the planet moves in a circular orbit and transits across the star’s diameter as seen from Earth. Show all your work even though you may not be satisfied with your final answer. We will discuss the details afterwards and learn an important lesson about assumptions and errors. ...
ASTR 1050: Survey of Astronomy
... 25. A main sequence type A star has about twice the surface temperature of our sun (a type G star). Assuming the stars are about the same physical size (i.e., same radius), how much more luminous is the type A star? a. Twice as luminous. b. Four times as luminous. c. Eight times as luminous. d. Sixt ...
... 25. A main sequence type A star has about twice the surface temperature of our sun (a type G star). Assuming the stars are about the same physical size (i.e., same radius), how much more luminous is the type A star? a. Twice as luminous. b. Four times as luminous. c. Eight times as luminous. d. Sixt ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... 200 pc, but you don’t need to know that.) The more distant star (Spica) appears fainter. Since it is twice as distant as Canopus, it appears 4 times fainter, or ¼ as bright. We could use the magnitude system to describe how much fainter Spica is than Canopus, but I prefer to talk about fluxes instea ...
... 200 pc, but you don’t need to know that.) The more distant star (Spica) appears fainter. Since it is twice as distant as Canopus, it appears 4 times fainter, or ¼ as bright. We could use the magnitude system to describe how much fainter Spica is than Canopus, but I prefer to talk about fluxes instea ...
The H-R Diagram
... The Main Sequence: The main sequence goes from the upper left to the lower right. The stars at the upper left are hotter, larger, and more massive than the Sun. The Sun is near with an absolute magnitude of MV=+5 and a spectral type G2. Like all m.s. stars it is of luminosity class V. Those stars to ...
... The Main Sequence: The main sequence goes from the upper left to the lower right. The stars at the upper left are hotter, larger, and more massive than the Sun. The Sun is near with an absolute magnitude of MV=+5 and a spectral type G2. Like all m.s. stars it is of luminosity class V. Those stars to ...
Test #3
... a. the ratio of the angular separation from the center of mass of each of the stars. b. the distance to the binary and its radial velocity. c. the semi major axis and period of the orbit. d. the radial velocities of the two stars. 15. Blue stars are _____ than red stars a. hotter b. cooler c. larger ...
... a. the ratio of the angular separation from the center of mass of each of the stars. b. the distance to the binary and its radial velocity. c. the semi major axis and period of the orbit. d. the radial velocities of the two stars. 15. Blue stars are _____ than red stars a. hotter b. cooler c. larger ...
Teaching ideas for Option E, Astrophysics
... The magnitude scale is confusing to students when they first meet it, so it is important to give many examples to make sure students understand that the smaller the magnitude the brighter the star appears to be. Students will always ask where the letters OBAFGKM for spectral classes come from. There ...
... The magnitude scale is confusing to students when they first meet it, so it is important to give many examples to make sure students understand that the smaller the magnitude the brighter the star appears to be. Students will always ask where the letters OBAFGKM for spectral classes come from. There ...
Star Types
... Most stars appear on the Main Sequence, where stars appear to obey a Mass-Luminosity relation: L M3.5 For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. Th ...
... Most stars appear on the Main Sequence, where stars appear to obey a Mass-Luminosity relation: L M3.5 For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. Th ...
LAB: Star Classification
... stars known so far, with a temperature of 200,000º K at its surface. Stars of intermediate mass (1-8 solar masses) terminate their life as an Earth-sized white dwarf after the exhaustion of their nuclear fuel. During the transition from a nuclear-burning star to the white dwarf stage, the star becom ...
... stars known so far, with a temperature of 200,000º K at its surface. Stars of intermediate mass (1-8 solar masses) terminate their life as an Earth-sized white dwarf after the exhaustion of their nuclear fuel. During the transition from a nuclear-burning star to the white dwarf stage, the star becom ...
binary stars - El Camino College
... Two-thirds of all stars are part of multiple star systems, where two or more stars are born at the same time from the same gas cloud. Only about 30% of all stars are single, like the Sun. The distances between companion stars ranges from less than 10 million miles (0.1 AU), to over 10,000 AU. Simila ...
... Two-thirds of all stars are part of multiple star systems, where two or more stars are born at the same time from the same gas cloud. Only about 30% of all stars are single, like the Sun. The distances between companion stars ranges from less than 10 million miles (0.1 AU), to over 10,000 AU. Simila ...
Basic Properties of the Stars
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
PowerPoint - Star Life Cycle
... Which of the following best describes the category in which the Sun would be placed? A. blue supergiant stars B. red giant stars C. yellow main sequence stars D. white dwarf stars ...
... Which of the following best describes the category in which the Sun would be placed? A. blue supergiant stars B. red giant stars C. yellow main sequence stars D. white dwarf stars ...
Constellation Part II readingConstellation Part II reading(es)
... Arabs learned of the Greeks’ writings on astronomy and translated them into Arabic. Greeks had named their stars based on the star’s position in a constellation, but Arabs began naming individual stars for people. Later, the Romans translated the Arabic writings into Latin. We therefore have Arabic ...
... Arabs learned of the Greeks’ writings on astronomy and translated them into Arabic. Greeks had named their stars based on the star’s position in a constellation, but Arabs began naming individual stars for people. Later, the Romans translated the Arabic writings into Latin. We therefore have Arabic ...
Death of Stars
... Lower turn-off point from the main sequence indicates High turn-off point shows there are that there are not many high mass stars left so this high mass stars present, so this cluster is cluster is older - likely to be a globular cluster younger and probably an open cluster Present information by pl ...
... Lower turn-off point from the main sequence indicates High turn-off point shows there are that there are not many high mass stars left so this high mass stars present, so this cluster is cluster is older - likely to be a globular cluster younger and probably an open cluster Present information by pl ...
Properties of Stars
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, mediummass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plane ...
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, mediummass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plane ...
Activity: Star Classification - d
... Part 1: Exploring with Classification Each group will receive 1 set of 27 stars. Every star has: a color, name, temperature, size, & luminosity value o The luminosity is compared to the sun's luminosity. If a star has a luminosity value of 5, then it is 5 times brighter than our sun. If a star h ...
... Part 1: Exploring with Classification Each group will receive 1 set of 27 stars. Every star has: a color, name, temperature, size, & luminosity value o The luminosity is compared to the sun's luminosity. If a star has a luminosity value of 5, then it is 5 times brighter than our sun. If a star h ...
Auriga (constellation)
Auriga is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy and remains one of the 88 modern constellations. Located north of the celestial equator, its name is the Latin word for ""charioteer"", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent during winter evenings in the Northern Hemisphere, along with the five other constellations that have stars in the Winter Hexagon asterism. Because of its northern declination, Auriga is only visible in its entirety as far as 34° south; for observers farther south it lies partially or fully below the horizon. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra.Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky. Beta Aurigae is an interesting variable star in the constellation; Epsilon Aurigae, a nearby eclipsing binary with an unusually long period, has been studied intensively. Because of its position near the winter Milky Way, Auriga has many bright open clusters in its borders, including M36, M37, and M38, popular targets for amateur astronomers. In addition, it has one prominent nebula, the Flaming Star Nebula, associated with the variable star AE Aurigae.In Chinese mythology, Auriga's stars were incorporated into several constellations, including the celestial emperors' chariots, made up of the modern constellation's brightest stars. Auriga is home to the radiant for the Aurigids, Zeta Aurigids, Delta Aurigids, and the hypothesized Iota Aurigids.