Astronomy of the Northern Sky—
... The Northern Sky faces mostly away from the Milky Way center. Much of the easy-to-find nebulosity is not in this part of the sky, but there are a few we can detect with naked eye, binoculars or small telescopes, preferably the wide-field or rich-field type. All we can use in the northern sky are in ...
... The Northern Sky faces mostly away from the Milky Way center. Much of the easy-to-find nebulosity is not in this part of the sky, but there are a few we can detect with naked eye, binoculars or small telescopes, preferably the wide-field or rich-field type. All we can use in the northern sky are in ...
H-R Diagram
... To identify the characteristics of a star from data in the diagram To classify a star by its position in the diagram To compare the life cycle stages of stars based on their positions in the diagram Background The Hertzsprung-Russell diagram, or H-R diagram, is a graph in which a star's temperature ...
... To identify the characteristics of a star from data in the diagram To classify a star by its position in the diagram To compare the life cycle stages of stars based on their positions in the diagram Background The Hertzsprung-Russell diagram, or H-R diagram, is a graph in which a star's temperature ...
HR Diagram Lab Handout
... Brightness: the number of times brighter the star is than our Sun (a fractions means it is dimmer than our Sun) Expected Lifetime: the number of years the star is expected to exist based on color and brightness Getting Started: Making the HR Diagram 1. Hand out the “stars” to each member of your ...
... Brightness: the number of times brighter the star is than our Sun (a fractions means it is dimmer than our Sun) Expected Lifetime: the number of years the star is expected to exist based on color and brightness Getting Started: Making the HR Diagram 1. Hand out the “stars” to each member of your ...
S T A R S
... Aldebaran is Alpha Tauri. It means the Follower as it follows the Pleiades across the sky. It was involved in numerous Roman, Greek , Persian and Eastern stories. Arcturus in the book of Job is thought to be Aldebaran. It is about 40 times our sun’s diameter and is about 68 light years away. Aldeba ...
... Aldebaran is Alpha Tauri. It means the Follower as it follows the Pleiades across the sky. It was involved in numerous Roman, Greek , Persian and Eastern stories. Arcturus in the book of Job is thought to be Aldebaran. It is about 40 times our sun’s diameter and is about 68 light years away. Aldeba ...
BAS Visit to the Norman Lockyer Observatory, October 2015
... star consisting of a red giant and a companion star. The system is approximately 400 light years distant. See page 13 for star map and location. Mira A, a red giant belonging to the spectral type M7 IIIe, is an oscillating variable star that serves as a prototype for an entire class of variables, th ...
... star consisting of a red giant and a companion star. The system is approximately 400 light years distant. See page 13 for star map and location. Mira A, a red giant belonging to the spectral type M7 IIIe, is an oscillating variable star that serves as a prototype for an entire class of variables, th ...
What We Know About Stars So Far
... •Scientists also figured out that the color of the star told us something about their temperature •Red-colored stars are cooler in temperature compared to bluecolored stars. ...
... •Scientists also figured out that the color of the star told us something about their temperature •Red-colored stars are cooler in temperature compared to bluecolored stars. ...
Prep/Review Questions - Faculty Web Sites at the University
... to move from one day to the next? A) north; B) south; C) east; D) west. To add visual interest, stage productions and movies often show a full Moon near the horizon, regardless of the ostensible time of night. At what times of night can this happen in real life? In a new Tom Hanks "Castaway" sequel, ...
... to move from one day to the next? A) north; B) south; C) east; D) west. To add visual interest, stage productions and movies often show a full Moon near the horizon, regardless of the ostensible time of night. At what times of night can this happen in real life? In a new Tom Hanks "Castaway" sequel, ...
Chapter 10: Measuring the Stars - Otto
... Barnard’s star moved 227” in 22 years 10.3” per year proper motion 1.8 pc distance - transverse velocity is 88 km/s ...
... Barnard’s star moved 227” in 22 years 10.3” per year proper motion 1.8 pc distance - transverse velocity is 88 km/s ...
What is a Scientist? - Cockeysville Middle School
... by nuclear fusion. This is a process whereby hydrogen atoms are fused together to create helium atoms. In the process a tremendous amount of energy is given off in the form of electromagnetic waves and heat. There are billions of stars in a galaxy. When you look up into the night sky, most of the st ...
... by nuclear fusion. This is a process whereby hydrogen atoms are fused together to create helium atoms. In the process a tremendous amount of energy is given off in the form of electromagnetic waves and heat. There are billions of stars in a galaxy. When you look up into the night sky, most of the st ...
Major Stars of the Orion Constellation
... by changes in the actual size of the star's atmosphere. According to Robert Burnham, Jr. (1931-93), Betelgeuse is the only marked variable among the first magnitude stars as well as the 11th brightest star in the sky. It is a well known semi-regular, pulsating variable, whose main period appears to ...
... by changes in the actual size of the star's atmosphere. According to Robert Burnham, Jr. (1931-93), Betelgeuse is the only marked variable among the first magnitude stars as well as the 11th brightest star in the sky. It is a well known semi-regular, pulsating variable, whose main period appears to ...
A Star is
... • Blue stars have average surface temperatures of 35,000˚C. • Red stars have average surface temperatures of 3,000˚C. • Yellow stars, such as the sun, have surface temperatures of about ...
... • Blue stars have average surface temperatures of 35,000˚C. • Red stars have average surface temperatures of 3,000˚C. • Yellow stars, such as the sun, have surface temperatures of about ...
Lecture 6
... Brightness Brightness e.g. 10-12 Watts/m2 Simple and easy to understand If your eye is 10-4m2, then it collects 10-16W 4 stars at 10-12W/m2 together have 4x10-12W/m2 But this would be too easy for astronomers. We use a brightness system invented by Ptolemy in the 400’s ...
... Brightness Brightness e.g. 10-12 Watts/m2 Simple and easy to understand If your eye is 10-4m2, then it collects 10-16W 4 stars at 10-12W/m2 together have 4x10-12W/m2 But this would be too easy for astronomers. We use a brightness system invented by Ptolemy in the 400’s ...
Announcements Evolution of High-Mass Stars: Red Supergiants
... • Parallax only works for nearby stars (within about 1000 light years) • For more distant stars, we use Standard Candles Car Headlights are standard candles: We use them to determine the car’s distance ...
... • Parallax only works for nearby stars (within about 1000 light years) • For more distant stars, we use Standard Candles Car Headlights are standard candles: We use them to determine the car’s distance ...
Integrative Studies 410 Our Place in the Universe
... distance ladder out as far as we can see Cepheids – about 50 million ly • In 1920 Hubble used this technique to measure the distance to Andromeda (about 2 million ly) • Works best for periodic variables ...
... distance ladder out as far as we can see Cepheids – about 50 million ly • In 1920 Hubble used this technique to measure the distance to Andromeda (about 2 million ly) • Works best for periodic variables ...
Stars in the night Sky - ScienceEducationatNewPaltz
... o Are zenith and nadir points time-dependent? That is, do they differ for an observer at the same location but at different times? o Is it meaningful to speak of the azimuth of a star at the observer's zenith? A line (arc) from the point due north on the horizon (0 degrees) passing through the zenit ...
... o Are zenith and nadir points time-dependent? That is, do they differ for an observer at the same location but at different times? o Is it meaningful to speak of the azimuth of a star at the observer's zenith? A line (arc) from the point due north on the horizon (0 degrees) passing through the zenit ...
Virtual Sky II (Rev 10/11)
... Procedure 4 Arcturus Nears the Sun Over long periods the appearance of constellations will change. Go to ‘Open Settings’ to open up Settings> Arcturus Nears Sun. Initiate the demo by clicking start. Stop when Arcturus reaches the boundary (purple line) between Bootes and Virgo. How many years did it ...
... Procedure 4 Arcturus Nears the Sun Over long periods the appearance of constellations will change. Go to ‘Open Settings’ to open up Settings> Arcturus Nears Sun. Initiate the demo by clicking start. Stop when Arcturus reaches the boundary (purple line) between Bootes and Virgo. How many years did it ...
CHAP
... A. APPARENT BRIGHTNESS - Stars that are _________ to Earth appear brighter to us and stars ____________ from Earth seem dimmer. B. ABSOLUTE BRIGHTNESS ...
... A. APPARENT BRIGHTNESS - Stars that are _________ to Earth appear brighter to us and stars ____________ from Earth seem dimmer. B. ABSOLUTE BRIGHTNESS ...
May
... NGC4656 is a type SBm barred spiral galaxy in the constellation Canes Venatici (KAY-neez- vë-NAT-ih-si). Popularly known as the Hockey Stick Galaxy, the key features are the angled tilt of the disk and the apparent offset of the core. If observing at low magnification look in the same field of view ...
... NGC4656 is a type SBm barred spiral galaxy in the constellation Canes Venatici (KAY-neez- vë-NAT-ih-si). Popularly known as the Hockey Stick Galaxy, the key features are the angled tilt of the disk and the apparent offset of the core. If observing at low magnification look in the same field of view ...
RR animation
... RR Lyraes are pulsating horizontal branch stars of spectral class A (and rarely F), with a mass of around half the Sun's. They are thought to have previously shed mass and consequently, they were once stars with similar or slightly less mass than the Sun, around 0.8 solar masses. RR Lyrae stars puls ...
... RR Lyraes are pulsating horizontal branch stars of spectral class A (and rarely F), with a mass of around half the Sun's. They are thought to have previously shed mass and consequently, they were once stars with similar or slightly less mass than the Sun, around 0.8 solar masses. RR Lyrae stars puls ...
Thought Question
... How would the absolute magnitude of Alpha Centauri change if it were three times farther away? A. It would be +3 magnitudes fainter B. It would be -3 magnitudes brighter C. It would stay the same (its absolute magnitude is an intrinsic property of a star) ...
... How would the absolute magnitude of Alpha Centauri change if it were three times farther away? A. It would be +3 magnitudes fainter B. It would be -3 magnitudes brighter C. It would stay the same (its absolute magnitude is an intrinsic property of a star) ...
Activity 4
... In this equation, m is the apparent magnitude and M is the absolute magnitude. Apparent magnitude can be easily measured from a CCD image, but absolute magnitude takes some work. Cepheid variables ...
... In this equation, m is the apparent magnitude and M is the absolute magnitude. Apparent magnitude can be easily measured from a CCD image, but absolute magnitude takes some work. Cepheid variables ...
Crux
Crux /ˈkrʌks/, located in the deep southern sky, is the smallest yet one of the most distinctive of the 88 modern constellations. Its name is Latin for cross, and it is dominated by a cross-shaped asterism that is commonly known as the Southern Cross. Although visible to the Ancient Greeks, it was seen as part of the constellation Centaurus, and not defined or accurately mapped till the 16th century.Known as Acrux, blue-white Alpha Crucis is the constellation's brightest star and the bottom star of the cross. Nearly as bright are Beta and Gamma, while Delta and Epsilon make up the asterism. Many of the constellation's brighter stars are members of the Scorpius–Centaurus Association, a loose group of hot blue-white stars that appear to share a common origin and motion across the Milky Way. Two star systems have been found to have planets. The constellation also contains four Cepheid variables visible to the naked eye under optimum conditions. Crux also contains the Jewel Box, a bright open cluster, and the Coalsack Nebula, the most prominent dark nebula in the sky.