Cepheid period - Study guides, Class notes & Summaries

 -1.5 magnitude Sirius appears 25x brighter than 2 magnitude Polaris.  “All neutron stars are pulsars, but not all pulsars are neutron stars” FALSE  “Spectroscopic Binary” is the term given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts.  A 6.8 solar mass neutron star does NOT exist.  A loop of gas and charged particles following the magnetic field lines between sunspot’s poles is a Prominence/...

AS101 - Assignment #9 Questions and Answers 100% Pass Who first noticed that for Cepheid variable stars there was a direct relationship between the luminosity and the period of the variation in their brightness? a. Henrietta Leavitt b. Harlow Shapley c. Annie Cannon d. Edwin Hubble - a Who first calibrated the Cephied variable stars for use in determining distance? a. Carl Sagan b. Henrietta Leavitt c. Harlow Shapley d. Edwin Hubble - c 2 | P a g e Author: Katelyn Whitman. ©2025, ...

Astro 102 - Final Exam Set Questions With 100% Correct Answers | Latest Update What is cosmology? - ANSWER : the study of how the distribution of galaxies changes over time How does the size of a supernova compare with the size of the observable universe? - ANSWER : The size of a supernova is 2/3 the size of the observable universe Cepheids with longer periods have... - ANSWER : higher luminosities A Cepheid with a period of 30 days has an average luminosity that is.... - ANS...

To get started, click on the blue Cepheids link on the main screen of the Interactive Figure. The Interactive Figure (in red) shows a graph of the Cepheid period-luminosity relation. This graph indicates that __________. - Cepheids with longer periods have higher luminosities A Cepheid with a period of 30 days has an average luminosity that is about __________ times the luminosity of the Sun. - 10,000 Click on the blue "Cepheid" label, then click the label on the bottom of the Intera...

How does the hypothesis of inflation account for the existence of the "seeds" of density from which galaxies and other large structures formed? Ans- Inflation would have caused random, microscopic quantum fluctuations to grow so large in size that they became the seeds of structure. Why do virtually all the galaxies in the universe appear to be moving away from our own? Ans- Expansion causes all galaxies to move away from nearly all others. Suppose we observe a Cepheid variable in a ...

Name: Date: STUDENT EXPLORATION: BIG BANG THEORY – HUBBLE’S LAW DIRECTIONS: FOLLOW THE INSTRUCTIONS TO GO THROUGH THE SIMULATION. RESPOND TO THE QUESTIONS AND PROMPTS IN THE ORANGE BOXES. 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 th...

Gizmos 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 motorcycle headlights, one in each direction. The headlight on your left appea...

What are the characteristics of disk stars (yellow) of the Milky Way Galaxy? - High mass stars, the Sun, youngest stars, and stars that all orbit in nearly the same plane What are the characteristics of halo stars (green) of the Milky Way Galaxy? - Globular clusters, oldest stars, stars whose orbits can be inclined at any angle, and stars with smallest abundance of heavy elements. What are the characteristics of spiral galaxies? - They contain abundant clouds of cool gas and dust, are rare...

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...

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...