Chapter 28 – Stars and Galaxies
... 1. Stars are mostly of super-hot gases – mostly H & He E. Mass, Size and Temperature of Stars 1. Mass is something that can not be observed directly. It can only be calculated based on other observations 2. Stellar mass is expressed as multiples of the sun’s mass Betelgeuse’s mass – 20 solar masse ...
... 1. Stars are mostly of super-hot gases – mostly H & He E. Mass, Size and Temperature of Stars 1. Mass is something that can not be observed directly. It can only be calculated based on other observations 2. Stellar mass is expressed as multiples of the sun’s mass Betelgeuse’s mass – 20 solar masse ...
An Introduction to Astronomy and Cosmology
... Eve or the 30th June. Since the time definition was changed, 22 leap seconds have had to be added, about one every 18 months, but there were none between 1998 and 2005 showing the slowdown is not particularly regular. Leap seconds are somewhat of a nuisance for systems such as the Global Positioning ...
... Eve or the 30th June. Since the time definition was changed, 22 leap seconds have had to be added, about one every 18 months, but there were none between 1998 and 2005 showing the slowdown is not particularly regular. Leap seconds are somewhat of a nuisance for systems such as the Global Positioning ...
Night Sky Checklist July–August–September Unaided Eye Astronomy
... Delphinus, the Dolphin, is a faint little constellation that is noticeable mainly because it lies just outside the Summer Triangle between Cygnus and Aquila. Stars (The stars on the checklist are easily visible to the unaided eye except in the most light polluted parts of cities.) Antares is a red s ...
... Delphinus, the Dolphin, is a faint little constellation that is noticeable mainly because it lies just outside the Summer Triangle between Cygnus and Aquila. Stars (The stars on the checklist are easily visible to the unaided eye except in the most light polluted parts of cities.) Antares is a red s ...
PH109 Exploring the Universe, Test 3, Fall 2001 Please indicate the
... 2. The temperature of the layer of gas that produces the visible light of the Sun is about _______. a) 15 million K, b) 300,000 K, c) 10 million K, d) 1 million K, e) 5800 K 3. What is the net result of the proton-proton chain? a) 2 heliums are fused into 1 carbon, 1 neutrinos + energy b) 4 hydrogen ...
... 2. The temperature of the layer of gas that produces the visible light of the Sun is about _______. a) 15 million K, b) 300,000 K, c) 10 million K, d) 1 million K, e) 5800 K 3. What is the net result of the proton-proton chain? a) 2 heliums are fused into 1 carbon, 1 neutrinos + energy b) 4 hydrogen ...
Stars and Constellations
... how stars evolve. Lead students to understand the difference between apparent magnitude and absolute magnitude. Showing a flashlight at varying distances is a concrete means of demonstrating the difference. 2) Have students construct simple astrolabes using drinking straws, washers, string and protr ...
... how stars evolve. Lead students to understand the difference between apparent magnitude and absolute magnitude. Showing a flashlight at varying distances is a concrete means of demonstrating the difference. 2) Have students construct simple astrolabes using drinking straws, washers, string and protr ...
Date_________________ TWINKLE, TWINKLE
... a star. The spectra of stars provide one basis for classifying stars. Stars have colors which you can notice if you let your eyes acclimate at night (red, orange, yellow, white, and blue). The major lines in a star's spectrum dictates the color. Stars of similar color share other characteristics tha ...
... a star. The spectra of stars provide one basis for classifying stars. Stars have colors which you can notice if you let your eyes acclimate at night (red, orange, yellow, white, and blue). The major lines in a star's spectrum dictates the color. Stars of similar color share other characteristics tha ...
6. 1 Star Distances 6. 2 Apparent Brightness, Intrinsic Brightness
... The large size of the giants and supergiants means their atmospheres have low densities. Giant stars, luminosity class Ill, have narrow spectral lines, and supergiants, class I, have extremely narrow lines. Class V main-sequence stars have relatively broad spectral lines. ...
... The large size of the giants and supergiants means their atmospheres have low densities. Giant stars, luminosity class Ill, have narrow spectral lines, and supergiants, class I, have extremely narrow lines. Class V main-sequence stars have relatively broad spectral lines. ...
Stellar Evolution
... •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. •The more massive a Main Sequence star is, the hotter (bluer), and more luminous. •The Main Sequence is ...
... •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. •The more massive a Main Sequence star is, the hotter (bluer), and more luminous. •The Main Sequence is ...
Stars Study Guide KEY
... Use this KEY to check your study guide for accuracy. Answers do not need to be word-for-word the same(but important facts/details should not be missing! Goal 1: Diagram the life cycle of stars. Explain how the cycle for low-mass stars differs from that of highmass stars. ...
... Use this KEY to check your study guide for accuracy. Answers do not need to be word-for-word the same(but important facts/details should not be missing! Goal 1: Diagram the life cycle of stars. Explain how the cycle for low-mass stars differs from that of highmass stars. ...
SR Stellar Properties
... 4. Are any of the stars that you plotted on the H-R diagram white dwarf stars? What is the evidence for your answer? ______________________________________________________________________________ 5. Our sun has a surface temperature of 6000 K and an absolute magnitude of + 4.7. Plot the Sun on the H ...
... 4. Are any of the stars that you plotted on the H-R diagram white dwarf stars? What is the evidence for your answer? ______________________________________________________________________________ 5. Our sun has a surface temperature of 6000 K and an absolute magnitude of + 4.7. Plot the Sun on the H ...
A Star is a ball of matter that is pulled together by gravity, and that
... 4. Measuring the Distance to Stars: we measure the distance between objects in space using ___________. –Parallax is the apparent change in _______________of a star in the sky when viewed from two different positions in earth’s revolution. The ______________a star is, the ________________its paralla ...
... 4. Measuring the Distance to Stars: we measure the distance between objects in space using ___________. –Parallax is the apparent change in _______________of a star in the sky when viewed from two different positions in earth’s revolution. The ______________a star is, the ________________its paralla ...
Lecture 6
... Brightness is a function of the inverse square of distance, so if distance was cut by half it would get brighter by 4x=1/(.5)2 ...
... Brightness is a function of the inverse square of distance, so if distance was cut by half it would get brighter by 4x=1/(.5)2 ...
Formation of Stars - mcp
... 3. Our sun is used to determine masses of stars ◦ 1.0 solar mass = mass of our sun ◦ If a stellar object is less than .01 solar mass it will not turn into a star ...
... 3. Our sun is used to determine masses of stars ◦ 1.0 solar mass = mass of our sun ◦ If a stellar object is less than .01 solar mass it will not turn into a star ...
Powerpoint of lecture 1
... choosing constant to make scale consistent with Hipparchus. Absolute magnitude M is defined as the apparent magnitude a star ...
... choosing constant to make scale consistent with Hipparchus. Absolute magnitude M is defined as the apparent magnitude a star ...
Oct 2017 - What`s Out Tonight?
... A Light Year (ly) is a unit of length and is equal to the discan be seen with the naked eye. tance light travels in one year. Since light moves at the speed of Our 186,282 miles a second, one light year is nearly 6 trillion miles Double Stars Moon long. The closest nighttime star visible to the nake ...
... A Light Year (ly) is a unit of length and is equal to the discan be seen with the naked eye. tance light travels in one year. Since light moves at the speed of Our 186,282 miles a second, one light year is nearly 6 trillion miles Double Stars Moon long. The closest nighttime star visible to the nake ...
Where is the Sun in the Milk Way?
... • This equaDon shows the effect of the geometrical diluDon of the flux as a funcDon of distance from a star. • It’s also called the “Inverse-‐Square Law” ...
... • This equaDon shows the effect of the geometrical diluDon of the flux as a funcDon of distance from a star. • It’s also called the “Inverse-‐Square Law” ...
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.