Binary star - Study guides, Class notes & Summaries

CompTIA Network+ Study Guide: Exam N10-009 (Sybex Study Guide) 6th Edition 2024 with complete solution Table of Contents 1. Cover 2. Table of Contents 3. Title Page 4. Copyright 5. Acknowledgments 6. About the Authors 7. About the Technical Editor 8. Table of Exercises 9. Introduction 1. What Is the Network+ Certification? 2. Why Become Network+ Certified? 3. How to Become Network+ Certified 4. Tips for Taking the Network+ Exam 5. Who Should Read This Book? 6. What Does This Bo...

 -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/...

This exam is entirely multiple choice or true/false. A=T, B=F TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) The photosphere is about 100 times the diameter of the Earth, and large sunspots are larger than our whole planet. 1) 2) Granulation is the most obvious proof of solar convective energy transport. 2) 3) The solar corona is much cooler than the Sun's surface, hence we must wait for a total solar eclipse to glimpse it with the naked eye. 3)...

We have learned that the centre of the milky way contains a very massive black hole. We developed this understanding by: - 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: - The planets in the solar system would orbit the Sun in unchanged fashion (but would receive no light from it) The first stellar mass black hole identified, Cygnus X-1, was found in 1973. The n...

Consider a spectroscopic binary star system in which the spectra of both stars are observed. If Star A is more massive than Star B, which star has the greater orbital velocity? a) Star A b) Star B c) They both have the same velocity d) The star that is closest to the center of mass e) It depends on where they are in their orbits - Consider a spectroscopic binary star system in which the spectra of both stars are observed. If Star A is more massive than Star B, which star has the greater o...

White dwarfs: properties - Remaining cores of dead, low mass stars Electron degeneracy pressure supports them against gravity Slowly fade with time Sirius and its hot WD companion White dwarfs with same mass as Sun are about same size as Earth; slowly cooling Typical density 10^6 gram / cubic cm Higher mass white dwarfs are smaller Cannot be more massive than 1.4MSun, the Chandrasekhar limit WDs in binaries: nova, supernova Type I - Mass falls toward white dwarf from binary companion ...

Which two factors primarily determine the characteristics of a star? Ans- its mass and its stage of life Star A is identical to Star B, except that Star A is twice as far from us as Star B. Therefore... Ans- both stars have the same luminosity, but the apparent brightness of Star B is four times that of Star A Which of the following statements about spectral types of stars is not generally true? Ans- The spectral type of a star can be used to determine its distance. Sirius is a star ...

Planetary ___ have common plane and direction, low eccentricity; correct answers orbits ___shows similar order; correct answers Rotation Moons have similar ___. correct answers motions Orbital spacing ___random. correct answers not Terrestrial and Jovian planets show ___ and composition correct answers trends in size The collapse of an interstellar cloud. As the cloud contracts, it rotates faster, and the outer parts flatten into a disk. This can be observed happening elsewhere in...

Luminosity - The total amount of power a star emits into space that's measured in watts. Apparent Brightness - Amount of starlight that actually reaches Earth HR Diagram - is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature and evolutionary stage. Stars in the stable phase of hydrogen burning lie along the Main Sequence according to their mass. OBAFGKM - Oh Be A Fine Girl Kiss Me Main Sequence - the vast majorit...

True & False The objective of SOL performance tuning on the client side is to generate an SOL query that returns the correct answer in the least amount of time, using the maximum amount of resources on the server side All database transactions must display at least the properties of Atomicity, consistency, convenience, and isolation Database recovery techniques are based on the isolation transaction property which indicate that the data used during execution of a transaction cannot...