Star spectra - Study guides, Class notes & Summaries

4 ways light interacts with matter - ️️1. emission (lightbulb) 2. absobtion 3. transmission (air, glass) 4. relfection / scattering accretion heat - ️️deposits energy brought by planetismals accretion heat - ️️Heat generated by meteor bombardment (deposits energy brought from planets) Adaptive Optic - ️️technologie that corrects astronomical seeing Angular Resolution - ️️The ability of a telescope to distinguish between adjacent objects in the sky. Asterism - ️️A...

ASTR 102 Exam Questions With All Correct Answers Current Update We have learned that the centre of the milky way contains a very massive black hole. We developed this understanding by: - Answer -Monitoring the orbital motions of many individual stars in the very central parts of the Milky Way If the sun were to be squashed down small enough to become a black hole, then: - Answer -The planets in the solar system would orbit the Sun in unchanged fashion (but would receive no light from it) ...

How did Hubble classify galaxies? - -shape and structural properties -stellar content -gas and dust -star formation -stellar motion What are the different categories Hubble used to classified galaxies ? - Spirals, barred spirals, ellipticals, irregulars What are the characteristics of spiral galaxies? - -flattened galactic disk with spiral arms -central galactic bulge -extended halo of faint old stars -spirals are classified according to the size of the central bulge and tightness of...

Gizmo: Star Spectra Vocabulary: absorption spectrum, binary star, blue shift, 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? It forms a rainbow. This band of colors is called a spectrum. 2. A rainbow is an example of a spectrum. What is the sequence of colors in a rainbow? Red, orange, yellow, green, blue, indigo, violet. Gizmo Warm-up The inte...

Astronomy Midterm 3 Exam - Questions and Answers (Complete Solutions) If you have a 100-watt light bulb, how much energy does it use each minute? A) 6,000 joules B) 6,000 watts C) 600 joules D) 600 watts E) 100 joules If a material is highly opaque, then it A) reflects most light. B) absorbs most light. C) transmits most light. D) scatters most light. E) emits most light. When light reflects off an object, what is the relation between the angle of incidence and the angle of reflection? A) angl...

A hydrogen atom that has been photoionized is _____. - ️️An ion, a proton, and positively charged. A main sequence O star will have a ___ temperature, a ____ radius, a ____ luminosity and a ____ absolute magnitude than a main sequence G star like the Sun. - ️️larger, larger, larger, smaller A star that is 50 pc away will show a parallax of _____. - ️️.02 arc secs A star with T=10,000 K (spectral type A) shows strong absorption lines from _______. - ️️neutral hydrogen (H I) ac...

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...

A few decades ago, there was great controversy among astronomers over the question of quasar distances, with some arguing that quasars are much nearer than application of Hubble's law would seem to imply. Why do nearly all astronomers now agree that quasars really are quite far away? - ️️We now have images and spectra that clearly show quasars to be embedded at the centers of distant galaxies and within distant galaxy clusters. A quasar's spectrum is hugely redshifted. What do most astron...

Suppose you know the frequency of a photon and the speed of light. What else can you determine about the photon? correct answers its wavelength and energy Which forms of light are lower in energy and frequency than the light that our eyes can see? correct answers infrared and radio If we say that a material is opaque to ultraviolet light, we mean that it __________. correct answers absorbs ultraviolet light Red light has a __________ wavelength and a __________ frequency that does blue ...

Test Bank for Foundations of Astronomy, 14e 14th Edition by Michael A. Seeds, Dana Backman. Full Chapters test bank included Part 1: Exploring the Sky Chapter 1: Here and Now 1-1 Where Are We? 1-2 When Is Now? 1-3 Why Study Astronomy? Chapter 2: A User's Guide to the Sky 2-1 Stars and Constellations 2-2 The Sky and Celestial Motions 2-3 Sun and Planets 2-4 Astronomical Influences on Earth's Climate Chapter 3: Moon Phases and Eclipses 3-1 The Changeable Moon 3-2 Lunar Eclipses...