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... Parallax: the apparent shift in the position of an object due to the movement of the observer. Remember looking at your finger through the left and then right eye? One parsec is the distance an object must be in order to have a parallax of one arc second. One parsec = 3.3 light years Alpha Centauri ...
... Parallax: the apparent shift in the position of an object due to the movement of the observer. Remember looking at your finger through the left and then right eye? One parsec is the distance an object must be in order to have a parallax of one arc second. One parsec = 3.3 light years Alpha Centauri ...
LIGO Star Chart
... the northern hemisphere. No telescope is necessary but the sky should be dark. This activity will show you how to locate several features of the night sky. The Big Dipper is the easiest group of stars to identify and can point you in the direction of other interesting areas of the sky. ...
... the northern hemisphere. No telescope is necessary but the sky should be dark. This activity will show you how to locate several features of the night sky. The Big Dipper is the easiest group of stars to identify and can point you in the direction of other interesting areas of the sky. ...
Schedule for Spring 2013 SCI 103 Introductory Astronomy
... Rate of mass conversion into energy Maximum lifetime of the Sun Relationship between the radius, temperature and luminosity of the Sun ...
... Rate of mass conversion into energy Maximum lifetime of the Sun Relationship between the radius, temperature and luminosity of the Sun ...
PHYS 1470 3.0 W16/17 Highlights of Astronomy Assignment #2
... c. What would Venus’ surface temperature, T, be, assuming that Venus radiated into space an amount, Pem , that is equal to the power it absorbed? d. What is the mean temperature on Venus, how much is it different from the temperature you computed in c) and what is the reason for the difference (if t ...
... c. What would Venus’ surface temperature, T, be, assuming that Venus radiated into space an amount, Pem , that is equal to the power it absorbed? d. What is the mean temperature on Venus, how much is it different from the temperature you computed in c) and what is the reason for the difference (if t ...
Starlight (conclusion)
... Types of stars, important terms Main Sequence Giants Supergiants White dwarfs What does it all mean? ...
... Types of stars, important terms Main Sequence Giants Supergiants White dwarfs What does it all mean? ...
Observing Information for Waddesdon, 4th October 2014
... Cygnus. It is 1400 light years distant so is a tremendously bright star Vega is the brightest of the three stars; it is almost overhead high to the S or SW and is the brightest star in the constellation Lyra. It is 25 light years away so quite close. Altair is south and about half way from the horiz ...
... Cygnus. It is 1400 light years distant so is a tremendously bright star Vega is the brightest of the three stars; it is almost overhead high to the S or SW and is the brightest star in the constellation Lyra. It is 25 light years away so quite close. Altair is south and about half way from the horiz ...
TEST1-WHITE Modern scientific theories are NOT: Testable
... e. Direction of motion 29. Spectral lines are often referred to as the star’s “fingerprints” because: a. Fingerprints also consist of individual lines that make a pattern b. Both are unique to their source c. Both can be easily categorized d. Both are characteristic of the individual that produced t ...
... e. Direction of motion 29. Spectral lines are often referred to as the star’s “fingerprints” because: a. Fingerprints also consist of individual lines that make a pattern b. Both are unique to their source c. Both can be easily categorized d. Both are characteristic of the individual that produced t ...
Chapter 5 Essay Questions
... 3 What is the definition of density? Approximately, what is the average density of the sun? 4 The corona is much hotter than the photosphere, yet we have to wait for a total solar eclipse to see the corona. Why is that? 5 Suppose you have a cool gas cloud of atoms, and you send visible light of all ...
... 3 What is the definition of density? Approximately, what is the average density of the sun? 4 The corona is much hotter than the photosphere, yet we have to wait for a total solar eclipse to see the corona. Why is that? 5 Suppose you have a cool gas cloud of atoms, and you send visible light of all ...
Ch16: The Milky Way
... Sun’s orbital motion (radius and velocity) tells us mass within Sun’s orbit: 1.0 x 1011 MSun The total amount of light suggests ~ few x 109 Msun Dark matter! ...
... Sun’s orbital motion (radius and velocity) tells us mass within Sun’s orbit: 1.0 x 1011 MSun The total amount of light suggests ~ few x 109 Msun Dark matter! ...
Chapter 10 Measuring the Stars: Giants, Dwarfs, and the Main
... • Transverse - perpendicular to line of sight • Radial - along our line of sight * ___________________ - annual movement of a star across the sky as seen from Earth • _____________________ has the largest known proper motion of any star – 10.3"/year – Most stars have proper motions less than 1”/year ...
... • Transverse - perpendicular to line of sight • Radial - along our line of sight * ___________________ - annual movement of a star across the sky as seen from Earth • _____________________ has the largest known proper motion of any star – 10.3"/year – Most stars have proper motions less than 1”/year ...
spring_2002_final - University of Maryland Astronomy
... C. using its angular size and distance from Earth. D. using data from spacecraft flybys. E. by measuring the time that it takes for the Red Spot to disappear from view. 49. If you were thrown onto the Martian surface near the equator without a spacesuit, what would be the most likely cause of your d ...
... C. using its angular size and distance from Earth. D. using data from spacecraft flybys. E. by measuring the time that it takes for the Red Spot to disappear from view. 49. If you were thrown onto the Martian surface near the equator without a spacesuit, what would be the most likely cause of your d ...
Stellar and Atomic Spectra
... Spectral classification of stars • The spectral classification essentially sorts stars according to their surface temperature.Sequence is: O B A F G K M • O type is hottest (~25,000K), M type is coolest (~2500K) • Star Colors: O blue to M red • Sequence subdivided by attaching one numerical digit, ...
... Spectral classification of stars • The spectral classification essentially sorts stars according to their surface temperature.Sequence is: O B A F G K M • O type is hottest (~25,000K), M type is coolest (~2500K) • Star Colors: O blue to M red • Sequence subdivided by attaching one numerical digit, ...
Light - Dan Caton
... Hydrogen Spectral Line Formation • Transitions in Bohr atom model give rise to different groups • Optical: Balmer (n=2) • UV: Lyman (n=1) • Ionization is transitions to/from infinity. ...
... Hydrogen Spectral Line Formation • Transitions in Bohr atom model give rise to different groups • Optical: Balmer (n=2) • UV: Lyman (n=1) • Ionization is transitions to/from infinity. ...
The Ever Expanding Universe
... Herculean task that involved over 2000 years of work! The Greeks knew how to do it using their mathematical invention trigonometry (the mathematics of right triangles), but a telescope precise enough to measure extremely tiny angles was not available until the 19th century when Friedrich Bessel succ ...
... Herculean task that involved over 2000 years of work! The Greeks knew how to do it using their mathematical invention trigonometry (the mathematics of right triangles), but a telescope precise enough to measure extremely tiny angles was not available until the 19th century when Friedrich Bessel succ ...
1. Which of the following statements is incorrect concerning sidereal
... A. The celestial spheres do not have just one common centre. B. The motions of the Sun are not its motions, but the motion of Earth. C. The Earth follow an elliptical orbit in its revolution around the Sun D. What appears to us as retrograde and forward motion of the planets is not their own, but th ...
... A. The celestial spheres do not have just one common centre. B. The motions of the Sun are not its motions, but the motion of Earth. C. The Earth follow an elliptical orbit in its revolution around the Sun D. What appears to us as retrograde and forward motion of the planets is not their own, but th ...
ASTR 1101-001 Spring 2008 - Louisiana State University
... Determining Intrinsic Brightness • Measure apparent magnitude, “m”. • Measure distance to star using stellar parallax. • “Move” star to a standard distance from us (10 parsecs) and adjust its magnitude accordingly absolute magnitude, “M”. – The absolute magnitude of each star in our catalog tells ...
... Determining Intrinsic Brightness • Measure apparent magnitude, “m”. • Measure distance to star using stellar parallax. • “Move” star to a standard distance from us (10 parsecs) and adjust its magnitude accordingly absolute magnitude, “M”. – The absolute magnitude of each star in our catalog tells ...
7th Grade Astronomy Study Guide
... a. the study of the makeup of stars b. the study of space travel c. the study of the universe’s origin, structure, and future d. the study of the solar system ____ 40. What is an imaginary point directly above an observer’s head? a. celestial sphere c. zenith b. altitude d. right ascension ____ 41. ...
... a. the study of the makeup of stars b. the study of space travel c. the study of the universe’s origin, structure, and future d. the study of the solar system ____ 40. What is an imaginary point directly above an observer’s head? a. celestial sphere c. zenith b. altitude d. right ascension ____ 41. ...
Ch. 5 The Universe and Solar System
... • Proof: 1929 Edwin Hubble observed that galaxies are moving away from each other—that the universe is expanding. • Red shift—means movement is away. • Proof 2: 1965 Arno Penzlas and Robert Wilson discovered background radiation—a remnant of the Big Bang. It is evenly distributed. • Proof 3: 1995 NA ...
... • Proof: 1929 Edwin Hubble observed that galaxies are moving away from each other—that the universe is expanding. • Red shift—means movement is away. • Proof 2: 1965 Arno Penzlas and Robert Wilson discovered background radiation—a remnant of the Big Bang. It is evenly distributed. • Proof 3: 1995 NA ...
24exoplanets5s
... The planets are detected by measuring the motions they induce in the central star The period and velocity of the motions allows the determination of the mass and orbit of the planet New missions in the next 20 years will allow for the detection of many new planets, including Earth-like, habitable ...
... The planets are detected by measuring the motions they induce in the central star The period and velocity of the motions allows the determination of the mass and orbit of the planet New missions in the next 20 years will allow for the detection of many new planets, including Earth-like, habitable ...
SNC 1D1 Space Unit Review Answers How long does it take the
... -When the temperature reaches 10,000,000 Celsius, nuclear fusion begins and the protostar begins producing energy -Enormous pressure and heat cause hydrogen atoms to combine to become helium atoms and light energy in the core -Condensed grains from nebula collide and stick to form planetesimals -The ...
... -When the temperature reaches 10,000,000 Celsius, nuclear fusion begins and the protostar begins producing energy -Enormous pressure and heat cause hydrogen atoms to combine to become helium atoms and light energy in the core -Condensed grains from nebula collide and stick to form planetesimals -The ...
Homework 2
... 5 orders of magnitude smaller, and therefore Mt otal will remain constant. As our period only depends on the combined mass of the system, which remains unchanged, the period will not be significantly altered. In (b), we are asked to compute the period of a system with a star that is 4 times more mas ...
... 5 orders of magnitude smaller, and therefore Mt otal will remain constant. As our period only depends on the combined mass of the system, which remains unchanged, the period will not be significantly altered. In (b), we are asked to compute the period of a system with a star that is 4 times more mas ...
Deep Space Objects
... that emit a beam of electromagnetic radiation are called pulsars. Astronomers use the beams of pulsars that happen to point toward us as highly precise measuring tools to make new discoveries from Earth. Ridiculously big stars may collapse with so much force that they actually tear a hole in the ‘s ...
... that emit a beam of electromagnetic radiation are called pulsars. Astronomers use the beams of pulsars that happen to point toward us as highly precise measuring tools to make new discoveries from Earth. Ridiculously big stars may collapse with so much force that they actually tear a hole in the ‘s ...
IK Pegasi
![](https://commons.wikimedia.org/wiki/Special:FilePath/Location_of_IK_Pegasi.png?width=300)
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.