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Science 9 Unit 5: Space Name - Science 9
Science 9 Unit 5: Space Name - Science 9

... Telescopes enable astronomers to see further into space and identify distant stars. The problem they still have is how far are they from the Earth? The answer to this question lies in two methods. Triangulation and Parallax are two ways to measure distances indirectly, on the ground, or in space. ...
Stars PowerPoint Slides
Stars PowerPoint Slides

... Analyze spectra to infer these properties; distance not required. ...
Light Years
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... Distances in space are so large that it does not make sense to use a typical unit such as kilometers or miles. Instead, astronomers use a special unit called a light year to measure the distances between stars and galaxies. A light year is the distance that light travels in one year. Moving 300,000 ...
Neutron Stars and Black Holes
Neutron Stars and Black Holes

... D. There is not enough information to tell ...
What is a standard candle?
What is a standard candle?

... D. There is not enough information to tell ...
Lecture 6 - Stars and Distances
Lecture 6 - Stars and Distances

... Explained Werthimer, “if we had looked at the sky even a few seconds later we wouldn’t have found a match” for this candidate. A signal that drifts so quickly that it can only be heard for seconds at a time at a given frequency can only be detected by blind luck. Needless to say, such a transmission ...
Milky Way
Milky Way

... cataloged over 1000 nebulae. – Many star clusters – Open clusters matched the Milky Way – Globular clusters more uniform in space ...
The Stars - University of Redlands
The Stars - University of Redlands

... – Semimajor axis: “how far you are away from that something” – Mass: “how much gravity is pulling you around in orbit” ...
AY 20 Fall 2010
AY 20 Fall 2010

... Galaxies: standard candles: variable stars, supernovae One of a kind proper motion studies: H2O masers at Galactic Center 8 kpc ...
Integrative Studies 410 Our Place in the Universe
Integrative Studies 410 Our Place in the Universe

... • Implosion of a white dwarf after it accretes a certain amount of matter, reaching about 1.4 solar masses • Very predictable; used as a standard candle – Estimate distances to galaxies where they occur ...
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... Just as brightness is related to apparent magnitude, luminosity is related to a term called “absolute magnitude.” Astronomers refer to a star’s “absolute magnitude (M)” as the apparent magnitude it would have at an arbitrary standardized distance of 10 parsecs (i.e., 32.6 light-years). #2. Combine ...
HOMEWORK #1
HOMEWORK #1

... Just as brightness is related to apparent magnitude, luminosity is related to a term called “absolute magnitude.” Astronomers refer to a star’s “absolute magnitude (M)” as the apparent magnitude it would have at an arbitrary standardized distance of 10 parsecs (i.e., 32.6 light-years). #2. Combine ...
OBAFGKM
OBAFGKM

... and why apparent vs absolute magnitudes? ...
Extension worksheet – Topic 6 - Cambridge Resources for the IB
Extension worksheet – Topic 6 - Cambridge Resources for the IB

... The average apparent magnitude of a Cepheid star is m  5.8 and the period of variation of its luminosity is 12 days. Using the relation M  2.83log10 T  1.81 between period T (in days) and average absolute magnitude M calculate the distance to this star. ...
Distances in Space Vocabulary - Londonderry NH School District
Distances in Space Vocabulary - Londonderry NH School District

... The light year is the most wellknown space distance unit used for measuring distances outside our solar system. It is equal to the distance light will travel in one year. Light travels 300,000 kilometers or 186,000 miles per second. A light year (LY) is over 9,000,000,000,000 kilometers or 5,865,696 ...
STUDY QUESTIONS #10 The MILKY WAY GALAXY diameter face
STUDY QUESTIONS #10 The MILKY WAY GALAXY diameter face

... 9. Using the rotation curve above, astronomers have calculated a mass for the whole Galaxy, out to about 50,000 light-year radius where there are no more stars, to be about 2 × 1011 M , yet by measuring light at all wavelengths, they only measure one sixth of that mass (3 × 1010 M ). Using the orbit ...
A star is a - Trimble County Schools
A star is a - Trimble County Schools

... __________________ cannot distinguish the distance a star is from earth • Clusters are stars close to each other due to gravitational attraction Binary Stars • _____________________________ – Pairs of stars that revolve around one another – Gravitationally bound & orbiting a common center of mass • ...
Great Astronomers of the 20th Century
Great Astronomers of the 20th Century

... Jill Tarter • Joint appointment at UC Berkeley and SETI ...
Celestial Distances
Celestial Distances

... observations (as in a celestial census), we need to know the distance to the star How can we measure the great distances to stars? We use various techniques, useful at different scales, with each scale connecting to the next, like a ladder On the Earth, lengths are specified in precise units such as ...
Class notes 2 - University of Texas Astronomy
Class notes 2 - University of Texas Astronomy

... triple system α Centauri. Other stars: ⎯ well spaced out; interstellar space is very empty. Mean distance between stars ~ 1 pc ~ 4 × 107 their radius (⇒ don't collide within lifetime of Galaxy, ~ 1010 years); ⎯ majority are fainter, cooler, and of lower mass than the Sun; ⎯ about half are double ...
Name Date ______ Period _____ Earth Science Chapter 25 Study
Name Date ______ Period _____ Earth Science Chapter 25 Study

... Stars that radiate short pulses of radio energy are called ____________________. The most dense stars known to exist are called ___________. The average star spends ____________________ percent of its life as a hydrogen-burning, main-sequence star. The sun is positioned about ____________________ of ...
Jeopardy
Jeopardy

... The mass of the objects & the distance between them ...
Distances in Space Vocabulary
Distances in Space Vocabulary

... Nothing in space or our universe stays still. Planets, moons, stars, and galaxies are in constant motion. They are moving due to the expansion of the space in the universe. Space has no known boundaries. The location of Earth in space has to be relative to other moving objects. ...
Distance and Luminosity (new 2012)
Distance and Luminosity (new 2012)

... Because of the Earth's revolution around the Sun, nearby stars appear to move with respect to very distant stars which seem to be standing still. Measure the angle to the star and observe how it changes as the position of the earth changes. In the diagram if the observation point is at the top of th ...
Stars - TeacherWeb
Stars - TeacherWeb

... using this as your topic sentence: “The three main characteristics used for classifying stars are size, temperature and brightness.” • Your paragraph should include, in addition to the topic sentence, three detail sentences each followed by an example sentence and finished off with a conclusion sent ...
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Cosmic distance ladder



The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.
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