Main sequence star - Study guides, Class notes & Summaries

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...

ASTRONOMY EXAM FINAL!!!! QUESTIONS AND ANSWERS 100% SOLVED What is the mass that divides low mass stars from high mass stars? (what is the criteria for a low mass star or a high mass star in terms of M) ️️M < 8M = low mass M > 8M = high mass What is the evolutionary endpoint for most low mass stars? ️️White Dwarf What is the evolutionary endpoint for most high mass stars? ️️Neutron Star What is happening in the core of a star while it is on the main sequence? ️️...

A high-luminosity star... A. is always at a larger distance than a low-luminosity star B. emits more light than a low-luminosity star C. is always redder than a star with a lower luminosity D. is at a lower temperature than a low-luminosity star E. is always at a smaller distance than a low-luminosity star Answer - B If a red giant appears the same brightness as a red main sequence star, which one is further away? A. the red giant B. we cannot tell C. it depends on the phase o...

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...

Astro 7n Exam 2A high-luminosity star... A. is always at a larger distance than a low-luminosity star B. emits more light than a low-luminosity star C. is always redder than a star with a lower luminosity D. is at a lower temperature than a low-luminosity star E. is always at a smaller distance than a low-luminosity star - correct answer B If a red giant appears the same brightness as a red main sequence star, which one is further away? A. the red giant B. we cannot tell C. it...

Astro 7n Exam 2 Questions And Revised Correct Answers Already Passed A high-luminosity star... A. is always at a larger distance than a low-luminosity star B. emits more light than a low-luminosity star C. is always redder than a star with a lower luminosity D. is at a lower temperature than a low-luminosity star E. is always at a smaller distance than a low-luminosity star - ANSWER : B If a red giant appears the same brightness as a red main sequence star, which one is furth...

Where does (did) a hub send data? A. Only to the receiving system B. Only to the sending system C. To all the systems connected to the hub D. Only to the server - Answer-To all the systems connected to the hub; A hub sends data to all the systems connected to it. What uniquely identifies every NIC? A. IP address B. Media access control address C. ISO number D. Packet ID number - Answer-Media Access Control (MAC) address What Windows utility do you use to find the MAC address for a sys...

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 ...

A high luminosity star - correct answer Emits more light than a low-luminosity star If a red giant appears the same brightness as a red main sequence star, which one is farther away? - correct answer The red giant The heaviest nuclei of all are formed... - correct answer During a supernova explosion Hydrogen-2 + proton = ____ + energy: - correct answer Helium-3 Which of the following has the smallest radius? - correct answer Neutron star Why does the main sequence part of a star'...

The sequence of events for the Sunlike star isstellar nursery Protostar , Sunlike star on main sequence, red giant, planetary nebula , white dwarf What fundamental particles make up a helium 3 atom5 up quarks, 4 down quarks, 2 electrons What passes in front of the Sun during a solar eclipse viewed from earththe moon Which of the following moves the fastest?venus at its perihelon ( closest point to the sun)