Penentuan Jarak dalam Astronomi II
... The duration of the Cepheids stage is typically less than 0.5 Myr and, taking also in consideration the rarity of massive stars at all, we guess that Cepheids form very poor galactic population Statistics of Cepheids discovered: ~3000 proven and suspected in the Galaxy, ~2500 in the LMC, ~1500 in th ...
... The duration of the Cepheids stage is typically less than 0.5 Myr and, taking also in consideration the rarity of massive stars at all, we guess that Cepheids form very poor galactic population Statistics of Cepheids discovered: ~3000 proven and suspected in the Galaxy, ~2500 in the LMC, ~1500 in th ...
AST 1A INTRODUCTION TO THE SOLAR SYSTEM Spring 2017 CH
... 2. What is the difference between our solar system, our galaxy, and the universe? 3. Why are light-years more convenient than miles, kilometers, or astronomical units for measuring certain distances? 4. Why is it difficult to detect planets orbiting other stars? 5. What does the size of the star ima ...
... 2. What is the difference between our solar system, our galaxy, and the universe? 3. Why are light-years more convenient than miles, kilometers, or astronomical units for measuring certain distances? 4. Why is it difficult to detect planets orbiting other stars? 5. What does the size of the star ima ...
REVIEW: STAR`S TEST
... What is the name of our galaxy ? ____MILKY WAY______ The planets that are closer to the sun have a ...
... What is the name of our galaxy ? ____MILKY WAY______ The planets that are closer to the sun have a ...
galaxy.
... in M 31, the Andromeda galaxy. The period-luminosity relationship for Cepheids defines a close relationship between the period of pulsation and the absolute magnitude of the star. Sine the apparent magnitude can be measured directly, determining the period of a Cepheid variable gives a precise measu ...
... in M 31, the Andromeda galaxy. The period-luminosity relationship for Cepheids defines a close relationship between the period of pulsation and the absolute magnitude of the star. Sine the apparent magnitude can be measured directly, determining the period of a Cepheid variable gives a precise measu ...
Which of the following is the best description of an Sc galaxy? A) a
... What evidence do we have that galaxies have extended haloes of dark matter? A) orbital speed doesn't fall off in the outer parts of galaxies B) the outer parts of galaxies are intense infrared sources C) light from background galaxies is blocked by the dark matter D) the orbits of distant globular c ...
... What evidence do we have that galaxies have extended haloes of dark matter? A) orbital speed doesn't fall off in the outer parts of galaxies B) the outer parts of galaxies are intense infrared sources C) light from background galaxies is blocked by the dark matter D) the orbits of distant globular c ...
2008 - UCL
... If the boiometric correction for the star is BC* : -3.0 and that for the Sun BCo: -0.1, what is the luminosity of the star? 10. Sketch a diagram showing the typical form of the 'rotation curve' for spiral gaiaxies. Comment on the nature of the rotation curve, and the main inference drawn from ...
... If the boiometric correction for the star is BC* : -3.0 and that for the Sun BCo: -0.1, what is the luminosity of the star? 10. Sketch a diagram showing the typical form of the 'rotation curve' for spiral gaiaxies. Comment on the nature of the rotation curve, and the main inference drawn from ...
- MrKowalik.com
... 4. If Earth and another celestial object were coming closer together, the electromagnetic waves are bunched together resulting in _____________________________________ 5. If Earth and another celestial object were moving apart, the electromagnetic waves are spread out causing a _____________________ ...
... 4. If Earth and another celestial object were coming closer together, the electromagnetic waves are bunched together resulting in _____________________________________ 5. If Earth and another celestial object were moving apart, the electromagnetic waves are spread out causing a _____________________ ...
Science 9 Unit 5: Space Name:
... 3. What is adaptive optics? How does this technology work? Adaptive optics is the technology that adjusts the mirror of a telescope, or adjusts the image of a telescope, to cancel the effects of the constant changes in Earth’s atmosphere. This technology works by computers that control the image , a ...
... 3. What is adaptive optics? How does this technology work? Adaptive optics is the technology that adjusts the mirror of a telescope, or adjusts the image of a telescope, to cancel the effects of the constant changes in Earth’s atmosphere. This technology works by computers that control the image , a ...
Magnitude scale theory
... Consider two stars A and B. Star A appears to be brighter than star B. In other words the intensity of the light reaching the observer from star A is greater than that from star B. ...
... Consider two stars A and B. Star A appears to be brighter than star B. In other words the intensity of the light reaching the observer from star A is greater than that from star B. ...
History of the Universe and Solar System
... first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. This is explained by “dark phantom energy”, which is hypothesized to be forming between galaxies and pushing them apart by repulsive gravitational force. Dark energy is cal ...
... first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. This is explained by “dark phantom energy”, which is hypothesized to be forming between galaxies and pushing them apart by repulsive gravitational force. Dark energy is cal ...
GEK - National University of Singapore
... star from the earth, and one way to do that is through this technique, called stellar parallax. a) Explain how this is done? Parallax is the apparent shift of a foreground object relative to some distant background as the observer’s point of view changes. Astronomers make use this trick as a measure ...
... star from the earth, and one way to do that is through this technique, called stellar parallax. a) Explain how this is done? Parallax is the apparent shift of a foreground object relative to some distant background as the observer’s point of view changes. Astronomers make use this trick as a measure ...
HR-diagram - Bakersfield College
... Distance, Apparent Magnitude, and Absolute Magnitude of Some Stars View from Earth 32.6 ly ...
... Distance, Apparent Magnitude, and Absolute Magnitude of Some Stars View from Earth 32.6 ly ...
Some Common SI Units of Length
... beyond our Solar System. In fact it is about one quarter of the way to the nearest star! Light years are good units for measuring the vast distances throughout our Milky Way galaxy and beyond into the Greater Universe. Don’t be fooled by the name light year. It is not a measure of time. It is define ...
... beyond our Solar System. In fact it is about one quarter of the way to the nearest star! Light years are good units for measuring the vast distances throughout our Milky Way galaxy and beyond into the Greater Universe. Don’t be fooled by the name light year. It is not a measure of time. It is define ...
Stars!!!!
... • This only happens to the most massive stars. • They become supernovas with more then 5 times the mass of the sun left. • The gravity is so strong that it pulls all the gases in so close that not even light can escape ...
... • This only happens to the most massive stars. • They become supernovas with more then 5 times the mass of the sun left. • The gravity is so strong that it pulls all the gases in so close that not even light can escape ...
Where is the Sun in the Milk Way?
... m1 and m2 are the apparent magnitudes of two stars F1 and € F2 are their observed fluxes ...
... m1 and m2 are the apparent magnitudes of two stars F1 and € F2 are their observed fluxes ...
How We Know the Earth Revolves Activity
... ever thought about this? For thousands of years it was thought that the Earth was at the center of the universe and that everything moved around the Earth at different rates. Today, scientists know that the Earth moves around the Sun due to the phenomenon known as “parallax”. Parallax is the apparen ...
... ever thought about this? For thousands of years it was thought that the Earth was at the center of the universe and that everything moved around the Earth at different rates. Today, scientists know that the Earth moves around the Sun due to the phenomenon known as “parallax”. Parallax is the apparen ...
ISP 205 Review Questions, Week 13
... lower spectrum is for a galaxy that is moving away from us due to the expansion of the Universe, so that the Doppler effect has shifted its absorption lines to the red. The shift can be related to the velocity of recession of the galaxy through the formula Δλ/λ = v/c. In this formula, λ is the "rest ...
... lower spectrum is for a galaxy that is moving away from us due to the expansion of the Universe, so that the Doppler effect has shifted its absorption lines to the red. The shift can be related to the velocity of recession of the galaxy through the formula Δλ/λ = v/c. In this formula, λ is the "rest ...
PHYSICS 1500 ASTRONOMY Sample Exam Solutions Section B
... Time to collapse depends on mass, but is probably say 1 million years (for a 4 solar mass star) to 30 million years (for a 1 solar mass star) or more – these are the times to reach the ZAMS (as illustrated above). Any timescale of this order is acceptable, with mass noted as the determining factor. ...
... Time to collapse depends on mass, but is probably say 1 million years (for a 4 solar mass star) to 30 million years (for a 1 solar mass star) or more – these are the times to reach the ZAMS (as illustrated above). Any timescale of this order is acceptable, with mass noted as the determining factor. ...
Goal: To understand the HR diagram
... • If we plotted all the stars from a single cluster what might we get? • First we should ask 2 questions: • 1) How do the distances from us compare to all the stars in the cluster (close to same, or not close)? • 2) How do the ages of the stars in the cluster compare? ...
... • If we plotted all the stars from a single cluster what might we get? • First we should ask 2 questions: • 1) How do the distances from us compare to all the stars in the cluster (close to same, or not close)? • 2) How do the ages of the stars in the cluster compare? ...
Unit 3 Review Sheet
... What are the 2 major pieces of evidence for the expansion of the Universe and why is each one important? ...
... What are the 2 major pieces of evidence for the expansion of the Universe and why is each one important? ...
Document
... Only about half of this power reaches the earth's surface, meaning that a one square meter solar panel that is 15% efficient can generate about 100 watts while the sun is shining…that is enough to light six compact florescent bulbs ...
... Only about half of this power reaches the earth's surface, meaning that a one square meter solar panel that is 15% efficient can generate about 100 watts while the sun is shining…that is enough to light six compact florescent bulbs ...
AST 207 Homework 5 Due 14 October 2011
... 2. Life on Deneb. Here you will find out what it means to live near a giant like Deneb. Recall that the luminosity of a star, where T is its temperature and R is its radius. Star ...
... 2. Life on Deneb. Here you will find out what it means to live near a giant like Deneb. Recall that the luminosity of a star, where T is its temperature and R is its radius. Star ...
PHYS 390 Lecture 3
... of the flux F on Earth can be inverted to find d. That is: (i) extract L from some observable characteristic of the star (ii) measure F on Earth (iii) use F = L / 4πd2 to solve for d. The problem with this approach is that dust and gas between Earth and the star in question tend to reduce F and give ...
... of the flux F on Earth can be inverted to find d. That is: (i) extract L from some observable characteristic of the star (ii) measure F on Earth (iii) use F = L / 4πd2 to solve for d. The problem with this approach is that dust and gas between Earth and the star in question tend to reduce F and give ...
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.