Stars Power Point
... 1. LIGHT YEARS – distance that light travels in one year – 9.5 trillion kilometers (light moves 300,000 Km/sec) 2. PARALLAX – an apparent shift in the position of an object when viewed from different directions ...
... 1. LIGHT YEARS – distance that light travels in one year – 9.5 trillion kilometers (light moves 300,000 Km/sec) 2. PARALLAX – an apparent shift in the position of an object when viewed from different directions ...
H-R Diagram - SFA Physics
... stars in the night sky. Transfer the main sequence curve from Figure 1 onto Figure 2. ...
... stars in the night sky. Transfer the main sequence curve from Figure 1 onto Figure 2. ...
PowerPoint - Earth Science with Mrs. Wilson
... the absolute magnitude (real brightness) of a star and its surface temperature. They plotted the data on a graph. ...
... the absolute magnitude (real brightness) of a star and its surface temperature. They plotted the data on a graph. ...
Measuring Stars
... •The spectrum of a star is pretty much a black body distribution •How bright each point on the surface is depends only on ...
... •The spectrum of a star is pretty much a black body distribution •How bright each point on the surface is depends only on ...
AST 207 Test 2 Answers 20 October 2010
... star A. Prof. Adams says he discovered a new type of star that is fainter than white dwarfs. Has he discovered a new type of star? Explain. The clues are very much like Walter Adams’ discovery that Sirius B is a white dwarf. However, there is a crucial missing clue. Since Sirius A and B were known t ...
... star A. Prof. Adams says he discovered a new type of star that is fainter than white dwarfs. Has he discovered a new type of star? Explain. The clues are very much like Walter Adams’ discovery that Sirius B is a white dwarf. However, there is a crucial missing clue. Since Sirius A and B were known t ...
name - New York Science Teacher
... TASK# 1: MAGNITUDE & BRIGHTNESS You will begin by learning how to identify stars by their magnitude (brightness), color, and temperature, and spectral class. PART 1: Use the Stars: Lights in the Sky (www.seasky.org/celestial-objects/stars.html) and write out the answers to the following questions on ...
... TASK# 1: MAGNITUDE & BRIGHTNESS You will begin by learning how to identify stars by their magnitude (brightness), color, and temperature, and spectral class. PART 1: Use the Stars: Lights in the Sky (www.seasky.org/celestial-objects/stars.html) and write out the answers to the following questions on ...
cosmological horizon
... what is the redshift of this galaxy? what is its recession velocity? how far away is it? ...
... what is the redshift of this galaxy? what is its recession velocity? how far away is it? ...
Astro 1 & 100 Levine Homework Stars Name:____________________________
... Stars, prior to doing this portion of the homework, if you need a refresher on m and M. Ranking questions are 2 points each. Consider the following table of stars: ID for ranking ...
... Stars, prior to doing this portion of the homework, if you need a refresher on m and M. Ranking questions are 2 points each. Consider the following table of stars: ID for ranking ...
Great Astronomers of the 20th Century
... Jill Tarter • Joint appointment at UC Berkeley and SETI ...
... Jill Tarter • Joint appointment at UC Berkeley and SETI ...
Star Formation
... • Small, hot stars that are dim are not on the main sequence and are called white dwarves. ...
... • Small, hot stars that are dim are not on the main sequence and are called white dwarves. ...
1 Ay 124 Winter 2014 – HOMEWORK #2 Problem 1
... than 1M , whose lifetimes are shorter than the age of the galaxy. a) Find the slope x such that an observer in a homogeneous, isotropic region counts, at every apparent bolmetric magnitude, equal numbers of stars in each octave of luminosity. What type of star dominates the counts if x is flatter t ...
... than 1M , whose lifetimes are shorter than the age of the galaxy. a) Find the slope x such that an observer in a homogeneous, isotropic region counts, at every apparent bolmetric magnitude, equal numbers of stars in each octave of luminosity. What type of star dominates the counts if x is flatter t ...
1” “Sky-Notes” of the Open University Astronomy Club. June 2005. A
... individual stars in a 4" (100mm) telescope. Increasing aperture brings greater rewards. lord Rosse and others using the 72" at Birr Castle in the 19th century observed three dark rifts radiating from the centre. later visual observers confirmed these. However with the advent of photography the rifts ...
... individual stars in a 4" (100mm) telescope. Increasing aperture brings greater rewards. lord Rosse and others using the 72" at Birr Castle in the 19th century observed three dark rifts radiating from the centre. later visual observers confirmed these. However with the advent of photography the rifts ...
Astronomy – Studying the Stars & Space
... and dense that even use their hydrogen quickly and may light cannot escape explode in a huge its gravity bright flash • Gas or dust that sink • Can be brighter than into black hole from a an entire galaxy for star form x-ray light several days which may indicate a • A collapsed star can black holes’ ...
... and dense that even use their hydrogen quickly and may light cannot escape explode in a huge its gravity bright flash • Gas or dust that sink • Can be brighter than into black hole from a an entire galaxy for star form x-ray light several days which may indicate a • A collapsed star can black holes’ ...
Life Cycles of Stars
... The Hipparcos Data • 118,218 stars measured: parallax and motion • 22,396 accurate to 10% - a 20-fold improvement • Stars out to 200-300 l.y. are known to within 10% • 30,000 more accurate to 20% • All pre-Hipparcos distance data is obsolete ...
... The Hipparcos Data • 118,218 stars measured: parallax and motion • 22,396 accurate to 10% - a 20-fold improvement • Stars out to 200-300 l.y. are known to within 10% • 30,000 more accurate to 20% • All pre-Hipparcos distance data is obsolete ...
The life of Stars
... • Eclipsing binaries (stars do not change physically, only their relative position changes) • Nova (two stars “collaborating” to produce “star eruption”) • Cepheids (stars do change physically) • RR Lyrae Stars (stars do change physically) • Mira Stars (stars do change physically) ...
... • Eclipsing binaries (stars do not change physically, only their relative position changes) • Nova (two stars “collaborating” to produce “star eruption”) • Cepheids (stars do change physically) • RR Lyrae Stars (stars do change physically) • Mira Stars (stars do change physically) ...
Calculating Main Sequence Lifetimes
... The luminosity (L) of a star is the energy radiated from all of its surface in one second. The absolute magnitude (M) is used usually to measure the luminosity of the stars; it is related to the stellar luminosity by an approximate relation: ⎛ L ⎞ M ≅ −2.5log⎜⎜ star ⎟⎟ + 5 ⎝ LSun ⎠ To drop t ...
... The luminosity (L) of a star is the energy radiated from all of its surface in one second. The absolute magnitude (M) is used usually to measure the luminosity of the stars; it is related to the stellar luminosity by an approximate relation: ⎛ L ⎞ M ≅ −2.5log⎜⎜ star ⎟⎟ + 5 ⎝ LSun ⎠ To drop t ...
Stars Unit 1-2: Stars
... Elements in Stars • Scientists use spectral analysis to determine the composition of stars. – Spectral analysis is a process that uses a tool called a spectroscope to separate the different wavelengths of light coming from a star. – By observing which wavelengths are stronger, missing, or weaker, s ...
... Elements in Stars • Scientists use spectral analysis to determine the composition of stars. – Spectral analysis is a process that uses a tool called a spectroscope to separate the different wavelengths of light coming from a star. – By observing which wavelengths are stronger, missing, or weaker, s ...
The Hubble Deep Field (HDF)
... The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. They pointed Hubble at a fairly empty region of space, one where very few stars are seen. The image was assembled from 342 separate exp ...
... The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. They pointed Hubble at a fairly empty region of space, one where very few stars are seen. The image was assembled from 342 separate exp ...
The Hubble Deep Field (HDF)
... The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. They pointed Hubble at a fairly empty region of space, one where very few stars are seen. The image was assembled from 342 separate exp ...
... The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. They pointed Hubble at a fairly empty region of space, one where very few stars are seen. The image was assembled from 342 separate exp ...
Science 9: Unit E: Space Exploration
... A problem with telescopes on Earth is that the moving atmosphere distorts the image of the stars and planets; that’s why stars twinkle in the sky. A way around this problem is to build telescopes where the atmosphere is thinner like on mountain tops. Another method is to have a computer measure the ...
... A problem with telescopes on Earth is that the moving atmosphere distorts the image of the stars and planets; that’s why stars twinkle in the sky. A way around this problem is to build telescopes where the atmosphere is thinner like on mountain tops. Another method is to have a computer measure the ...
The Family of Stars
... With ground-based telescopes, we can measure parallaxes p ≥ 0.02 arc sec => d ≤ 50 pc ...
... With ground-based telescopes, we can measure parallaxes p ≥ 0.02 arc sec => d ≤ 50 pc ...
Astronomy 360 - indstate.edu
... You can scale sky distances with your hand. For most people a fully spread hand at arm’s length covers about 20o of sky or about the length of the Big Dipper from the tip of the handle to the bowl. Finger widths alone give just a few degrees. ...
... You can scale sky distances with your hand. For most people a fully spread hand at arm’s length covers about 20o of sky or about the length of the Big Dipper from the tip of the handle to the bowl. Finger widths alone give just a few degrees. ...
Ch. 27 Stars & Galaxies
... What is your guess for the cause of the stellar motion shown in these photographs? ...
... What is your guess for the cause of the stellar motion shown in these photographs? ...
Malmquist bias
The Malmquist bias is an effect in observational astronomy which leads to the preferential detection of intrinsically bright objects. It was first described in 1922 by Swedish astronomer Gunnar Malmquist (1893–1982), who then greatly elaborated upon this work in 1925. In statistics, this bias is referred to as a selection bias and affects the survey results in a brightness limited survey, where stars below a certain apparent brightness are not included. Since observed stars and galaxies appear dimmer when farther away, the brightness that is measured will fall off with distance until their brightness falls below the observational threshold. Objects which are more luminous, or intrinsically brighter, can be observed at a greater distance, creating a false trend of increasing intrinsic brightness, and other related quantities, with distance. This effect has led to many spurious claims in the field of astronomy. Properly correcting for these effects has become an area of great focus.