Star and Galaxies
... • 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, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
... • 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, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
Volcanoes and Igneous Activity Earth
... • 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, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
... • 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, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
Night Sky Checklist October–November
... Square is high in the south, Alpheratz is the upper left star. Its name comes from an Arabic phrase meaning “navel of the horse,” and reflects a time when Alpheratz was considered as part of Pegasus. Markab is the brightest star in Pegasus and the second brightest star of the Great Square. When the ...
... Square is high in the south, Alpheratz is the upper left star. Its name comes from an Arabic phrase meaning “navel of the horse,” and reflects a time when Alpheratz was considered as part of Pegasus. Markab is the brightest star in Pegasus and the second brightest star of the Great Square. When the ...
Star Basics
... helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can ionize hydrogen over a volume of space 1000 light years across. ...
... helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can ionize hydrogen over a volume of space 1000 light years across. ...
Study Guide for 3RD Astronomy Exam
... Determine the hottest and coolest stars from a list of stars with their spectral types. Interpret the luminosity class of a star by naming the luminosity class and identifying if the star is in the “adult” phase or the “nursing home” phase of its evolution. Describe or identify how a parsec is defin ...
... Determine the hottest and coolest stars from a list of stars with their spectral types. Interpret the luminosity class of a star by naming the luminosity class and identifying if the star is in the “adult” phase or the “nursing home” phase of its evolution. Describe or identify how a parsec is defin ...
Study Island
... put one group of mice in a cold environment and another group of mice in a hot environment. Everything else about the two environments was the same, including the type and amount of food and water. She allowed the experiment to last for a few generations of mice and tested the activity levels of the ...
... put one group of mice in a cold environment and another group of mice in a hot environment. Everything else about the two environments was the same, including the type and amount of food and water. She allowed the experiment to last for a few generations of mice and tested the activity levels of the ...
Lecture 5: Stars
... We only know the absolute luminosity if we know the distance, but we only know the parallax distances out to about 100 pc (further to some bright stars). The problem is that if we see a star with a surface temperature of 3000K – is it a nearby red dwarf, or a distant red giant? Without more informat ...
... We only know the absolute luminosity if we know the distance, but we only know the parallax distances out to about 100 pc (further to some bright stars). The problem is that if we see a star with a surface temperature of 3000K – is it a nearby red dwarf, or a distant red giant? Without more informat ...
W > 1 - The Open University
... Unlike the gradual disappearance of a planet (small disc) a star vanishes instantly demonstrating that it is a point source of light as viewed from the Earth. For all occultation events start observing 10 to 15 minutes before the predicted time to identify the required star and to allow for slightly ...
... Unlike the gradual disappearance of a planet (small disc) a star vanishes instantly demonstrating that it is a point source of light as viewed from the Earth. For all occultation events start observing 10 to 15 minutes before the predicted time to identify the required star and to allow for slightly ...
O star
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
Where is the Sun in the Milk Way?
... ν is the frequency at which the spectral energy is emiced h is the Planck constant, h = 6.6260755 x 10−27 erg s ...
... ν is the frequency at which the spectral energy is emiced h is the Planck constant, h = 6.6260755 x 10−27 erg s ...
How Bright is that star?
... The luminosity of a star depends on two things The surface area (A) of the Star… bigger stars are brighter because there is more area to shine. And The luminosity (l ) of a square meter of surface area. L = Al ...
... The luminosity of a star depends on two things The surface area (A) of the Star… bigger stars are brighter because there is more area to shine. And The luminosity (l ) of a square meter of surface area. L = Al ...
Star Classification
... getting that hot). A star’s color is also determined by the temperature of the star’s surface. Relatively cool stars are red, warmer stars are orange or yellow, and extremely hot stars are blue or blue-white ( Figure 1.1). ...
... getting that hot). A star’s color is also determined by the temperature of the star’s surface. Relatively cool stars are red, warmer stars are orange or yellow, and extremely hot stars are blue or blue-white ( Figure 1.1). ...
P10263v1.2 Lab 5 Text
... sky during the spring, there is a small asterism known as “The Pleiades”, which marks the location of a cluster of stars. In legend, the Pleiades are the seven sisters, daughters of Atlas, the titan who holds up the sky, and the Oceanid named Pleione. The sisters are Alcyone, Maia, Electra, Taygeta, ...
... sky during the spring, there is a small asterism known as “The Pleiades”, which marks the location of a cluster of stars. In legend, the Pleiades are the seven sisters, daughters of Atlas, the titan who holds up the sky, and the Oceanid named Pleione. The sisters are Alcyone, Maia, Electra, Taygeta, ...
General Astronomy - Stockton University
... cloud of hydrogen escapes. – The type star, γ Cas is the brightest of the class, but it includes other well-known stars, such as Pleione (also known as BU Tau) in the Pleiades cluster. Frequent ejections of material have created a shell around Pleione. – The brightness variations in these stars are ...
... cloud of hydrogen escapes. – The type star, γ Cas is the brightest of the class, but it includes other well-known stars, such as Pleione (also known as BU Tau) in the Pleiades cluster. Frequent ejections of material have created a shell around Pleione. – The brightness variations in these stars are ...
1 Sep: 6.13am BST 15 Sep: 6.43am BST 30 Sep: 7.14am BST
... Both Cassiopeia and Cepheus lie in the Milky Way and are areas well worth sweeping through with binoculars or a telescope. To me Cepheus looks like a bishop’s mitre and below the bottom of the hat, just above IC1396, is µ Cephei or Herschel’s Garnet Star, a red super giant. Comet 2009 P1 (Garradd) ...
... Both Cassiopeia and Cepheus lie in the Milky Way and are areas well worth sweeping through with binoculars or a telescope. To me Cepheus looks like a bishop’s mitre and below the bottom of the hat, just above IC1396, is µ Cephei or Herschel’s Garnet Star, a red super giant. Comet 2009 P1 (Garradd) ...
temperature - University of Texas Astronomy Home Page
... example: Vega. We assert that Vega has a magnitude of 0, all other magnitudes of objects in the sky are compared to Vega: ...
... example: Vega. We assert that Vega has a magnitude of 0, all other magnitudes of objects in the sky are compared to Vega: ...
The Rigel Star - Emmi
... angry about the death of her companion, but forgave Apollo when he helped her hang his image in the sky so that he wouldn’t be forgotten. The Greeks said that this is why the constellation of Orion is visible in the winter, but wavers and vanishes when Scorpio appears in the summer. ...
... angry about the death of her companion, but forgave Apollo when he helped her hang his image in the sky so that he wouldn’t be forgotten. The Greeks said that this is why the constellation of Orion is visible in the winter, but wavers and vanishes when Scorpio appears in the summer. ...
Luminosity Classes
... They get noticeably dimmer, then brighter, then dimmer again. These are called Variable Stars. The change in luminosity is due to a change in size. (Though temperature changes too.) ...
... They get noticeably dimmer, then brighter, then dimmer again. These are called Variable Stars. The change in luminosity is due to a change in size. (Though temperature changes too.) ...
THE CONSTELLATION OCTANS, THE OCTANT
... MAJOR STARS IN OCTANS Nu Octantis is the brightest star in the constellation. It has an apparent visual magnitude of 3.76 and is approximately 69 light years distant from the solar system. The star is an orange giant with the stellar classification K1III. It is one of the least luminous giant stars ...
... MAJOR STARS IN OCTANS Nu Octantis is the brightest star in the constellation. It has an apparent visual magnitude of 3.76 and is approximately 69 light years distant from the solar system. The star is an orange giant with the stellar classification K1III. It is one of the least luminous giant stars ...
1st EXAM VERSION C - Department of Physics and Astronomy
... 26. The effect of interstellar dust on starlight is A. *to dim and redden distant stars by preferentially scattering their blue light. B. to scatter the red light from stars preferentially, making them appear more blue than expected. C. almost nonexistent, because light does not interact with dust. ...
... 26. The effect of interstellar dust on starlight is A. *to dim and redden distant stars by preferentially scattering their blue light. B. to scatter the red light from stars preferentially, making them appear more blue than expected. C. almost nonexistent, because light does not interact with dust. ...
Nov13Guide - East-View
... your eyes. Rather bigger than our Milky Way, it is estimated that the Andromeda Galaxy is home to one trillion stars. ...
... your eyes. Rather bigger than our Milky Way, it is estimated that the Andromeda Galaxy is home to one trillion stars. ...
Star Search Game: Constructing a Hertzsprung
... Inspired by: Ian Christie (VSSEC); Activity created by: Nandita Bajaj Introduction: Star Search is an online game developed by the Victorian Space Science Education Centre (VSSEC) that allows the user to go on a simulated journey into space using a spacecraft in search of various stars. The user is ...
... Inspired by: Ian Christie (VSSEC); Activity created by: Nandita Bajaj Introduction: Star Search is an online game developed by the Victorian Space Science Education Centre (VSSEC) that allows the user to go on a simulated journey into space using a spacecraft in search of various stars. The user is ...
