Cepheid variable Study guides, Class notes & Summaries
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ASTR 1010 Final Vanderbilt; 100% VERIFIED (GRADED A+)
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dark energy + evidence correct answers a mysterious repulsive force that appears to be causing the expansion of the universe to accelerate 
 
Type Ia supernovae as standard candles; Hbl law says they should be moving faster there; inverse square law for light dictates that dimmer = farther; calculated dstncs to things are even farther than their redshift predicts; they are being pushed away 
 
dark matter + evidence correct answers matter (gravity, attractive force) that does not give off electr...
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Science Bowl Astronomy Exam Questions With Complete Solutions (Verified And Updated)
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Science Bowl Astronomy Exam Questions 
With Complete Solutions (Verified And 
Updated) 
A solar eclipse can only occur at a: A. full moon B. new moon C. ½ gibbous moon D. ¼ gibbous 
moon - answerAnswer: B 
Which of the following constellations cannot be seen in the summer sky of the northern 
hemisphere? A. Libra B. Orion C. Ursa Major D. Cygnus - answerAnswer: B 
What percent of stars in the sky that appear to be single stars are actually binary stars: A. about 
90% B. about 50% C. about 20 %...
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ASTRON final exam Questions and answers, VERIFIED./ 2024/25 EXAM PREDICTION QUESTIONS/
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ASTRON final exam Questions and 
answers, VERIFIED. 
Ch 17- What do we use medthods of stand candles? - -Astronomers cannot use parallax to measure 
vast distances because the angle by which the galaxy's position changes as we move around the sun is 
too tiny to be detected, so astronomers must use this method to find distance 
How do we use standard candles? - -if we know the luminosity we can use the inverse-square law to 
deduce its distance from how bright it looks to us 
Cepheids - -ar...
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GIZMOS STUDENT EXPLORATION: BIG BANG THEORY – HUBBLE’S LAW 2021 THE BEST EXAM
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GIZMOS STUDENT EXPLORATION: BIG BANG THEORY – 
HUBBLE’S LAW 
2021 THE BEST EXAM 
 
Student Exploration: Big Bang Theory – Hubble’s Law 
Vocabulary: absolute brightness, absorption spectrum, apparent brightness, Big Bang theory, 
blueshift, Cepheid variable, Doppler shift, Hubble constant, Hubble’s law, luminosity, 
megaparsec, period, redshift, spectrograph 
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 
Standing by the side of a lonely highway at night, you see two moto...
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Astronomy 110 Final Exam
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How many constellations are there? - 88 constellations 
 
lookback time - The time elapsed between when we detect the light here on Earth and when it was originally emitted by the source, is known as the 'lookback time'. 
 
Center of Milky Way - The Galactic Center (or Galactic Centre) is the rotational center of the Milky Way galaxy; it is a supermassive black hole of 4.100 ± 0.034 million solar masses, which powers the compact radio source Sagittarius A. 
 
Period- Luminosity relation - In ...
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GIZMOS Student Exploration: Big Bang Theory – Hubble’s Law 2023 Student Exploration: Big Bang Theory – Hubble’s Law, GRADE A!!!
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Vocabulary: absolute brightness, absorption spectrum, apparent brightness, Big Bang theory, blueshift, Cepheid variable, Doppler shift, Hubble constant, Hubble’s law, luminosity, megaparsec, period, redshift, spectrograph 
 
 
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 
Standing by the side of a lonely highway at night, you see two motorcycle headlights, one in each direction. The headlight on your left appears brighter than the one on your right. 
 
1.	If the headlights are ...
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BIG BANG GIZMOS-HUBBLE'S LAW WITH VERIFIED SOLUTIONS ALREADY GRADED A+
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Absolute brightness 
the intrinsic brightness of a star that depends only on its luminosity. 
 
 
 
Apparent brightness 
how bright a star appears to an observer on Earth. 
 
 
 
Mpc 
Astronomers describe the apparent brightness of a star as the ratio between the brightness of the star to the brightness of the Sun when viewed from a distance of 1 _____________ . For example, a star with an apparent brightness of 10 is 10 times brighter than the sun would be if viewed from a distance of 1 _______...
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Student Exploration: Big Bang Theory – Hubble’s Law ALL ANSWERS 100% CORRECT FALL-2021 SOLUTION GUARANTEED GRADE A+ 20222023
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Vocabulary: absolute brightness, absorption spectrum, apparent brightness, Big Bang theory, blueshift, Cepheid variable, Doppler shift, Hubble constant, Hubble’s law, luminosity, megaparsec, period, redshift, spectrograph Gizmo Warm-up In 1912, an astronomer named Henrietta Swan Leavitt studied a class of stars called Cepheid variables. These stars change from bright to dim to bright again. Her discoveries led to a method of measuring distances to other galaxies and eventually helped to suppor...
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astr 115 final exam study guide | Detailed and Complete Solutions
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Hydrostatic Equilibrium 
The current distinguishing criterion between dwarf 
planets and small Solar System bodies 
Evolution of stars of different mass 
-Star formation produces a wide variety of stars 
-Only a few high-mass stars (O, B Type) are produced 
-The lowest mass stars (eg.M type) are the most 
common. 
-If a "star" forms with a mass less than about 1/10 the 
mass of the Sun, it will not have enough pressure in its 
core to ignite nuclear fusion. 
•The lower limit to the mass of a...
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GIZMO Star Spectra |Student Exploration: Star Spectra 2023 - ALL ANSWERS ARE CORRECT
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Student Exploration: Star Spectra 
Directions: Follow the instructions to go through the simulation. Respond to the questions and 
prompts in the orange boxes. 
Vocabulary: absorption spectrum, binary star, blueshift, Cepheid variable, emission spectrum, giant 
star, nebula, redshift, spectrum, star 
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 
1. What happens when light goes through a prism? When light goes through a prism the light bends. 
 This band of colors is called a spec...
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