Cepheid variable - 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/...

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...

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 observational measurement is required to determine the distance to a Galaxy using Hubble's Law? - ANSWER-Redshift What were the conditions of the early universe? - ANSWER-Hot and very dense True or False: If Light traveled for 5 billion years, then the distance between the two galaxies must have been less than 5 billion light years when the light began its journey because the distances between galaxies are always increasing in the expanding universe - ANSWER-True If our universe is...

What observational measurement is required to determine the distance to a Galaxy using Hubble's Law? - ANSWER-Redshift What were the conditions of the early universe? - ANSWER-Hot and very dense True or False: If Light traveled for 5 billion years, then the distance between the two galaxies must have been less than 5 billion light years when the light began its journey because the distances between galaxies are always increasing in the expanding universe - ANSWER-True If our universe is...

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...

Science Bowl Astronomy Study Guide Rated A+ Albedo Amount of sunlight that is reflected by the surface of a planet or a satellite, such as the Moon. Aphelion The point in an orbit in which an object is at its farthest possible distance from the Sun. Apogee The point in an orbit in which an object is at its farthest possible distance from the Earth. Astronomical Unit (AU) Mean distance from the Earth to the Sun. Aurora Glow in the Earth's ionosphere caused by the interaction...

What observational measurement is required to determine the distance to a Galaxy using Hubble's Law? - ANSWER-Redshift What were the conditions of the early universe? - ANSWER-Hot and very dense True or False: If Light traveled for 5 billion years, then the distance between the two galaxies must have been less than 5 billion light years when the light began its journey because the distances between galaxies are always increasing in the expanding universe - ANSWER-True If our universe is...