lecture23
... More luminous variable stars have large Period Variability is EXTREMELY USEFUL, because it is an absolute distance indicator ...
... More luminous variable stars have large Period Variability is EXTREMELY USEFUL, because it is an absolute distance indicator ...
Groups of Stars
... that are held close together because of gravity • More than half of all stars are members of star systems • Is our Sun part of a star system? ...
... that are held close together because of gravity • More than half of all stars are members of star systems • Is our Sun part of a star system? ...
Brightness + Magnitude of Stars
... A. Apparent or Relative Brightness-(cont.) *** As distance to Star Decreases brightness Increases (Inverse Relationship) *** As Luminosity of Star increases brightness Increases (Direct Relationship) B. Apparent Magnitude A number assigned to a celestial object that is a measure of its relative br ...
... A. Apparent or Relative Brightness-(cont.) *** As distance to Star Decreases brightness Increases (Inverse Relationship) *** As Luminosity of Star increases brightness Increases (Direct Relationship) B. Apparent Magnitude A number assigned to a celestial object that is a measure of its relative br ...
Barred Spiral Galaxy
... • Large amounts of electrically charged gas are ejected suddenly from the Sun’s corona. ...
... • Large amounts of electrically charged gas are ejected suddenly from the Sun’s corona. ...
Nights of the Heavenly G With
... the Pleiades and the Hyades. How do you know that the Hyades is an older cluster just by looking at it? There are at least two other good clusters in Taurus, NGC-1647 and NGC-1746. Have you ever observed them? 8. Finally, enjoy the sweep down though Orion's belt. Your binoculars will show that thes ...
... the Pleiades and the Hyades. How do you know that the Hyades is an older cluster just by looking at it? There are at least two other good clusters in Taurus, NGC-1647 and NGC-1746. Have you ever observed them? 8. Finally, enjoy the sweep down though Orion's belt. Your binoculars will show that thes ...
Starry Starry Night Vocabulary
... compared to surrounding regions. They appear dark because they are cooler than the surrounding photosphere. Supergiant star: A low-mass star of great size and luminosity that has a relatively low surface temperature, giving it a reddish or orange hue. It is larger, brighter, and more massive than a ...
... compared to surrounding regions. They appear dark because they are cooler than the surrounding photosphere. Supergiant star: A low-mass star of great size and luminosity that has a relatively low surface temperature, giving it a reddish or orange hue. It is larger, brighter, and more massive than a ...
Winter constellations
... Taurus, the Bull, with another prominent red star, Aldebaran, making up the eye of the Bull. The Taurus constellation looks particularly brilliant with binoculars, glittering with young blue stars. Aldebaran is a red supergiant star and is about five times the mass of the sun. The name means ‘follow ...
... Taurus, the Bull, with another prominent red star, Aldebaran, making up the eye of the Bull. The Taurus constellation looks particularly brilliant with binoculars, glittering with young blue stars. Aldebaran is a red supergiant star and is about five times the mass of the sun. The name means ‘follow ...
Making H-R Diagrams - PLC-METS
... Stars in the sky are not created equal and are composed of different materials, different temperatures, different brightness, different sizes, and different distances from Earth. A star’s mass dictates how bright it will be, how long it will live, its temperature and its size. The Sun is the center ...
... Stars in the sky are not created equal and are composed of different materials, different temperatures, different brightness, different sizes, and different distances from Earth. A star’s mass dictates how bright it will be, how long it will live, its temperature and its size. The Sun is the center ...
The Night Sky 12-07
... evening twilight. During the first few days of April, before it disappears from view, Mercury can be glimpsed along the horizon well below Mars. Jupiter reaches opposition this month, which means that it will be up all night long and high in the south at local midnight. For us in the U.P. on Eastern ...
... evening twilight. During the first few days of April, before it disappears from view, Mercury can be glimpsed along the horizon well below Mars. Jupiter reaches opposition this month, which means that it will be up all night long and high in the south at local midnight. For us in the U.P. on Eastern ...
Ch. 27 Stars & Galaxies
... Distance to the stars Light Years: The distance that light travels in one year. Speed of light is 300,000 km/sec. Light travels about 9.5 trillion km in one year. Fun Fact: Light from the sun takes 8 min. to reach Earth!!! ...
... Distance to the stars Light Years: The distance that light travels in one year. Speed of light is 300,000 km/sec. Light travels about 9.5 trillion km in one year. Fun Fact: Light from the sun takes 8 min. to reach Earth!!! ...
Homework 5 (stellar properties)
... 6. (3 pts.) What two observations/measurements would you make to classify a star according to its luminosity (i.e., luminosity class, e.g., Ia, Ib, II, III, IV, or V)? (Hint: Look at the HR diagram.) Which equation relates these two quantities to the size (radius) of a star (after all, the luminosit ...
... 6. (3 pts.) What two observations/measurements would you make to classify a star according to its luminosity (i.e., luminosity class, e.g., Ia, Ib, II, III, IV, or V)? (Hint: Look at the HR diagram.) Which equation relates these two quantities to the size (radius) of a star (after all, the luminosit ...
Hertzsprung-Russell Diagram Astronomy Project Purpose: To
... sun. Example: Betelgeuse is 38000 LSUN, and emits 1.4 x 1031 watts 3.) With the provided formula, determine the star’s radius, and find some way of comparing it to other objects in the solar system. Example: The radius of Betelgeuse is 380,000,000 km, which could fit the entire orbit of the inner pl ...
... sun. Example: Betelgeuse is 38000 LSUN, and emits 1.4 x 1031 watts 3.) With the provided formula, determine the star’s radius, and find some way of comparing it to other objects in the solar system. Example: The radius of Betelgeuse is 380,000,000 km, which could fit the entire orbit of the inner pl ...
The Fates of Stars Mass-Luminosity Relation: Lifetime Relation:
... be perfectly accurate; just show the general trend.) Remember that the temp. axis goes backwards. 2. Calculate the mass and total lifetime of one of these stars and fill this entries in the table. Make sure to translate the lifetime to years. (You may do the other stars if you have extra time.) 3. U ...
... be perfectly accurate; just show the general trend.) Remember that the temp. axis goes backwards. 2. Calculate the mass and total lifetime of one of these stars and fill this entries in the table. Make sure to translate the lifetime to years. (You may do the other stars if you have extra time.) 3. U ...
source
... be perfectly accurate; just show the general trend.) Remember that the temp. axis goes backwards. 2. Calculate the mass and total lifetime of one of these stars and fill this entries in the table. Make sure to translate the lifetime to years. (You may do the other stars if you have extra time.) 3. U ...
... be perfectly accurate; just show the general trend.) Remember that the temp. axis goes backwards. 2. Calculate the mass and total lifetime of one of these stars and fill this entries in the table. Make sure to translate the lifetime to years. (You may do the other stars if you have extra time.) 3. U ...
1/2016
... Description: Globular cluster NGC 288 was discovered by William Herschel on October 27, 1785 and cataloged by him as H VI.20. NGC 288 attracted attention of astronomers in the late 1980s when it was compared with the otherwise similar globular cluster NGC 362 on about the same right ascension (but m ...
... Description: Globular cluster NGC 288 was discovered by William Herschel on October 27, 1785 and cataloged by him as H VI.20. NGC 288 attracted attention of astronomers in the late 1980s when it was compared with the otherwise similar globular cluster NGC 362 on about the same right ascension (but m ...
Astronomy 2
... uses data from lots of stars, so there are lots of dots. The position of each dot on the diagram corresponds to the star's luminosity and its temperature The vertical position represents the star's luminosity (absolute magnitude). The horizontal position represents the star's surface temperature ...
... uses data from lots of stars, so there are lots of dots. The position of each dot on the diagram corresponds to the star's luminosity and its temperature The vertical position represents the star's luminosity (absolute magnitude). The horizontal position represents the star's surface temperature ...
Lab 1-2 : Vocabulary
... • Absolute - the magnitude of a star computed as if viewed from a distance of 32.6 light-years. • Apparent – a star’s brightness as it appears from Earth. The sun APPEARS brighter than the other stars because it is closer to us! ...
... • Absolute - the magnitude of a star computed as if viewed from a distance of 32.6 light-years. • Apparent – a star’s brightness as it appears from Earth. The sun APPEARS brighter than the other stars because it is closer to us! ...
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.