Microsoft Power Point version
... Deneb has an Absolute visual magnitude of -8.73 (this is about the same brightness as the quarter moon---but at 32.6 light years away!) Using the weird equation, the distance to deneb can be calculated: 2500 light years (M – m = 5 – 5log(d)) One last obvious question: How did we ever know the Absolu ...
... Deneb has an Absolute visual magnitude of -8.73 (this is about the same brightness as the quarter moon---but at 32.6 light years away!) Using the weird equation, the distance to deneb can be calculated: 2500 light years (M – m = 5 – 5log(d)) One last obvious question: How did we ever know the Absolu ...
Unit 1
... for light, we would expect to see light from a star in orbit around another star to arrive at different times, depending on the velocity of the star. • We do not see this – light always travels at the same speed. ...
... for light, we would expect to see light from a star in orbit around another star to arrive at different times, depending on the velocity of the star. • We do not see this – light always travels at the same speed. ...
Planetarium Key Points
... Latitude is the elevation of the visible pole and, roughly, of Polaris The motion of the sphere seems uniform, for this reason it was the source for time telling, but the time scale that comes from is NOT uniform: rotation is slowing down, the day is longer and longer at the rate of 2 ms a centu ...
... Latitude is the elevation of the visible pole and, roughly, of Polaris The motion of the sphere seems uniform, for this reason it was the source for time telling, but the time scale that comes from is NOT uniform: rotation is slowing down, the day is longer and longer at the rate of 2 ms a centu ...
29.2 - Stars - s3.amazonaws.com
... • Distance to stars from Earth is measured in Light-years – Light-year = distance light travels in one year – Light-year = 9.461 x 1015 m ...
... • Distance to stars from Earth is measured in Light-years – Light-year = distance light travels in one year – Light-year = 9.461 x 1015 m ...
Test #3
... a) Fusion of hydrogen atoms into helium atoms., b) Collapse of an interstellar cloud. c) Formation of a photosphere., d) Instability in an interstellar cloud. 37. The observed slowing of a clock in the vicinity of a black hole is a prediction of: a) Special relativity, b) General relativity, c) Stel ...
... a) Fusion of hydrogen atoms into helium atoms., b) Collapse of an interstellar cloud. c) Formation of a photosphere., d) Instability in an interstellar cloud. 37. The observed slowing of a clock in the vicinity of a black hole is a prediction of: a) Special relativity, b) General relativity, c) Stel ...
Stars Notes
... Astronomers can use line spectrums to identify the chemical elements in a star. Each element produces a characteristic pattern of spectral lines. Hydrogen Helium Sodium Calcium ...
... Astronomers can use line spectrums to identify the chemical elements in a star. Each element produces a characteristic pattern of spectral lines. Hydrogen Helium Sodium Calcium ...
9 spectroscopic parallax
... Can’t go back in time to watch stars form, or go forward in time to see them die. ...
... Can’t go back in time to watch stars form, or go forward in time to see them die. ...
Astronomy
... Big Bang Theory: the tremendously powerful explosion of an incredibly dense mass about 15-20 billion years ago that produced the expanding universe that exists today. Celestial object: something in space, such as a star or planet. Constellation: stars that appear to be grouped in patterns forming th ...
... Big Bang Theory: the tremendously powerful explosion of an incredibly dense mass about 15-20 billion years ago that produced the expanding universe that exists today. Celestial object: something in space, such as a star or planet. Constellation: stars that appear to be grouped in patterns forming th ...
Chapter 2 Knowing the Heavens
... 1. What role did astronomy play in ancient civilizations? 2. Are the stars that make up a constellation actually close to one other? 3. Are the same stars visible every night of the year? What is so special about the North Star? 4. Are the same stars visible from any location on Earth? 5. What cause ...
... 1. What role did astronomy play in ancient civilizations? 2. Are the stars that make up a constellation actually close to one other? 3. Are the same stars visible every night of the year? What is so special about the North Star? 4. Are the same stars visible from any location on Earth? 5. What cause ...
幻灯片 1
... High amplitude Delta Scuti star High amplitudes between 0.1 and 1mag Low rotational velocities ...
... High amplitude Delta Scuti star High amplitudes between 0.1 and 1mag Low rotational velocities ...
The Hidden Lives of Galaxies NSTA 2001
... Materials for Life Cycles of Stars This presentation, and other materials on the Life Cycles of Stars, are available on the Imagine the Universe! web site at: http://imagine.gsfc.nasa.gov/docs/teachers/lifecycles/stars.html ...
... Materials for Life Cycles of Stars This presentation, and other materials on the Life Cycles of Stars, are available on the Imagine the Universe! web site at: http://imagine.gsfc.nasa.gov/docs/teachers/lifecycles/stars.html ...
Monday, April 15
... Earth = a grain of sand The Earth orbits the Sun at a distance of one meter Proxima Centauri lies 270 kilometers (170 miles) away Barnard’s Star lies 370 kilometers (230 miles) away Less than 100 stars lie within 1000 kilometers (600 miles) ...
... Earth = a grain of sand The Earth orbits the Sun at a distance of one meter Proxima Centauri lies 270 kilometers (170 miles) away Barnard’s Star lies 370 kilometers (230 miles) away Less than 100 stars lie within 1000 kilometers (600 miles) ...
REVIEW: STAR`S TEST
... What factor determines a star’s color ? _______surface temperature______________________________ The apparent magnitude of a star tells you how bright the star is as viewed from A nebula is a huge cloud of gas, primarily composed of hydrogen A nebula becomes a star when _______fusion takes place____ ...
... What factor determines a star’s color ? _______surface temperature______________________________ The apparent magnitude of a star tells you how bright the star is as viewed from A nebula is a huge cloud of gas, primarily composed of hydrogen A nebula becomes a star when _______fusion takes place____ ...
Lecture2
... Why do the stars move? The Earth Rotates (from W to E) It appears to us as if the sky (the Celestial Sphere) rotates (from E to W) Path of Stars Stars “attached” to celestial sphere Path is a circle (like latitude circle) Called diurnal circle (diurnal = daily) ...
... Why do the stars move? The Earth Rotates (from W to E) It appears to us as if the sky (the Celestial Sphere) rotates (from E to W) Path of Stars Stars “attached” to celestial sphere Path is a circle (like latitude circle) Called diurnal circle (diurnal = daily) ...
Homework 5 (stellar properties)
... 2. (2 pts.) What does luminosity measure that is different from what absolute visual magnitude measures? ...
... 2. (2 pts.) What does luminosity measure that is different from what absolute visual magnitude measures? ...
Evan_Skillman_1
... Pleiades now has no stars with life expectancy less than around 100 million years. ...
... Pleiades now has no stars with life expectancy less than around 100 million years. ...
Star - Uplift Education
... Cepheid variables are stars with regular variation in absolute magnitude (luminosity) (rapid brightening, gradual dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces wit ...
... Cepheid variables are stars with regular variation in absolute magnitude (luminosity) (rapid brightening, gradual dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces wit ...
Surveying the Stars
... • Just about anything you want to find out about a star, you can find out if it’s in an eclipsing binary system (well, maybe a slight exaggeration, but not much) ...
... • Just about anything you want to find out about a star, you can find out if it’s in an eclipsing binary system (well, maybe a slight exaggeration, but not much) ...
Lecture 24 - Empyrean Quest Publishers
... from apparent brightness and distance (d). Apparent magnitude (old way). We can see about 1,000 stars in Northern Hemisphere with naked eye. Hipparchus rated them from 1 to 6. A '1' is 2.52 x brighter than a '2', etc. Range in brightness from the sun at '-26' magnitude to the faintest objects seen a ...
... from apparent brightness and distance (d). Apparent magnitude (old way). We can see about 1,000 stars in Northern Hemisphere with naked eye. Hipparchus rated them from 1 to 6. A '1' is 2.52 x brighter than a '2', etc. Range in brightness from the sun at '-26' magnitude to the faintest objects seen a ...
Unit 1: The Big Picture
... – Thought Milky Way made up entire universe until 1920s – Small fuzzy patches in telescopes appeared as nebulae, Latin for clouds – Edwin Hubble measured approximate distance to nearby Andromeda…no way Milky Way was that large – 3 Types: spiral, elliptical, irregular ...
... – Thought Milky Way made up entire universe until 1920s – Small fuzzy patches in telescopes appeared as nebulae, Latin for clouds – Edwin Hubble measured approximate distance to nearby Andromeda…no way Milky Way was that large – 3 Types: spiral, elliptical, irregular ...
Document
... b. They show where less light is absorbed by a star’s atmosphere. c. They are the emission lines of an electrically charged element. d. They show where a star has black spots. _____ 10. What objects are formed from the materials in the core of a supernova? a. black holes and supergiants b. red giant ...
... b. They show where less light is absorbed by a star’s atmosphere. c. They are the emission lines of an electrically charged element. d. They show where a star has black spots. _____ 10. What objects are formed from the materials in the core of a supernova? a. black holes and supergiants b. red giant ...
t2 images part 1
... proportional to their distance from each other: v=H* d Where H is the Hubble Constant If the Universe is expanding, it stands that at some point in the past everything in the Universe was all concentrated at the same point and began expanding outward. This point in time is called the “Big Ba ...
... proportional to their distance from each other: v=H* d Where H is the Hubble Constant If the Universe is expanding, it stands that at some point in the past everything in the Universe was all concentrated at the same point and began expanding outward. This point in time is called the “Big Ba ...
Habitibility of Earth, in our Solar System, and Beyond
... Temperature in a solar system Heat mostly from star, decreases away from it. Yellow zone = liquid water at planet’s surface. Stars get hotter as ...
... Temperature in a solar system Heat mostly from star, decreases away from it. Yellow zone = liquid water at planet’s surface. Stars get hotter as ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.